1697 lines
74 KiB
C
1697 lines
74 KiB
C
/*
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* Linux Security Module interfaces
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*
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* Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
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* Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
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* Copyright (C) 2001 James Morris <jmorris@intercode.com.au>
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* Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)
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* Copyright (C) 2015 Intel Corporation.
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* Copyright (C) 2015 Casey Schaufler <casey@schaufler-ca.com>
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* Copyright (C) 2016 Mellanox Techonologies
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Due to this file being licensed under the GPL there is controversy over
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* whether this permits you to write a module that #includes this file
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* without placing your module under the GPL. Please consult a lawyer for
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* advice before doing this.
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*
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*/
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#ifndef __LINUX_LSM_HOOKS_H
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#define __LINUX_LSM_HOOKS_H
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#include <linux/security.h>
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#include <linux/init.h>
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#include <linux/rculist.h>
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/**
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* union security_list_options - Linux Security Module hook function list
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*
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* Security hooks for program execution operations.
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*
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* @bprm_creds_for_exec:
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* If the setup in prepare_exec_creds did not setup @bprm->cred->security
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* properly for executing @bprm->file, update the LSM's portion of
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* @bprm->cred->security to be what commit_creds needs to install for the
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* new program. This hook may also optionally check permissions
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* (e.g. for transitions between security domains).
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* The hook must set @bprm->secureexec to 1 if AT_SECURE should be set to
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* request libc enable secure mode.
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* @bprm contains the linux_binprm structure.
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* Return 0 if the hook is successful and permission is granted.
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* @bprm_creds_from_file:
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* If @file is setpcap, suid, sgid or otherwise marked to change
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* privilege upon exec, update @bprm->cred to reflect that change.
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* This is called after finding the binary that will be executed.
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* without an interpreter. This ensures that the credentials will not
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* be derived from a script that the binary will need to reopen, which
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* when reopend may end up being a completely different file. This
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* hook may also optionally check permissions (e.g. for transitions
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* between security domains).
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* The hook must set @bprm->secureexec to 1 if AT_SECURE should be set to
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* request libc enable secure mode.
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* The hook must add to @bprm->per_clear any personality flags that
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* should be cleared from current->personality.
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* @bprm contains the linux_binprm structure.
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* Return 0 if the hook is successful and permission is granted.
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* @bprm_check_security:
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* This hook mediates the point when a search for a binary handler will
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* begin. It allows a check against the @bprm->cred->security value
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* which was set in the preceding creds_for_exec call. The argv list and
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* envp list are reliably available in @bprm. This hook may be called
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* multiple times during a single execve.
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* @bprm contains the linux_binprm structure.
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* Return 0 if the hook is successful and permission is granted.
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* @bprm_committing_creds:
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* Prepare to install the new security attributes of a process being
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* transformed by an execve operation, based on the old credentials
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* pointed to by @current->cred and the information set in @bprm->cred by
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* the bprm_creds_for_exec hook. @bprm points to the linux_binprm
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* structure. This hook is a good place to perform state changes on the
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* process such as closing open file descriptors to which access will no
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* longer be granted when the attributes are changed. This is called
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* immediately before commit_creds().
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* @bprm_committed_creds:
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* Tidy up after the installation of the new security attributes of a
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* process being transformed by an execve operation. The new credentials
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* have, by this point, been set to @current->cred. @bprm points to the
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* linux_binprm structure. This hook is a good place to perform state
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* changes on the process such as clearing out non-inheritable signal
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* state. This is called immediately after commit_creds().
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*
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* Security hooks for mount using fs_context.
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* [See also Documentation/filesystems/mount_api.rst]
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*
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* @fs_context_dup:
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* Allocate and attach a security structure to sc->security. This pointer
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* is initialised to NULL by the caller.
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* @fc indicates the new filesystem context.
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* @src_fc indicates the original filesystem context.
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* @fs_context_parse_param:
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* Userspace provided a parameter to configure a superblock. The LSM may
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* reject it with an error and may use it for itself, in which case it
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* should return 0; otherwise it should return -ENOPARAM to pass it on to
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* the filesystem.
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* @fc indicates the filesystem context.
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* @param The parameter
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*
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* Security hooks for filesystem operations.
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*
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* @sb_alloc_security:
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* Allocate and attach a security structure to the sb->s_security field.
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* The s_security field is initialized to NULL when the structure is
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* allocated.
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* @sb contains the super_block structure to be modified.
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* Return 0 if operation was successful.
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* @sb_delete:
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* Release objects tied to a superblock (e.g. inodes).
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* @sb contains the super_block structure being released.
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* @sb_free_security:
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* Deallocate and clear the sb->s_security field.
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* @sb contains the super_block structure to be modified.
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* @sb_free_mnt_opts:
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* Free memory associated with @mnt_ops.
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* @sb_eat_lsm_opts:
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* Eat (scan @orig options) and save them in @mnt_opts.
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* @sb_statfs:
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* Check permission before obtaining filesystem statistics for the @mnt
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* mountpoint.
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* @dentry is a handle on the superblock for the filesystem.
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* Return 0 if permission is granted.
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* @sb_mount:
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* Check permission before an object specified by @dev_name is mounted on
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* the mount point named by @nd. For an ordinary mount, @dev_name
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* identifies a device if the file system type requires a device. For a
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* remount (@flags & MS_REMOUNT), @dev_name is irrelevant. For a
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* loopback/bind mount (@flags & MS_BIND), @dev_name identifies the
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* pathname of the object being mounted.
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* @dev_name contains the name for object being mounted.
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* @path contains the path for mount point object.
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* @type contains the filesystem type.
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* @flags contains the mount flags.
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* @data contains the filesystem-specific data.
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* Return 0 if permission is granted.
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* @sb_copy_data:
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* Allow mount option data to be copied prior to parsing by the filesystem,
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* so that the security module can extract security-specific mount
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* options cleanly (a filesystem may modify the data e.g. with strsep()).
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* This also allows the original mount data to be stripped of security-
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* specific options to avoid having to make filesystems aware of them.
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* @orig the original mount data copied from userspace.
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* @copy copied data which will be passed to the security module.
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* Returns 0 if the copy was successful.
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* @sb_mnt_opts_compat:
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* Determine if the new mount options in @mnt_opts are allowed given
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* the existing mounted filesystem at @sb.
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* @sb superblock being compared
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* @mnt_opts new mount options
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* Return 0 if options are compatible.
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* @sb_remount:
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* Extracts security system specific mount options and verifies no changes
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* are being made to those options.
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* @sb superblock being remounted
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* @data contains the filesystem-specific data.
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* Return 0 if permission is granted.
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* @sb_kern_mount:
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* Mount this @sb if allowed by permissions.
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* @sb_show_options:
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* Show (print on @m) mount options for this @sb.
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* @sb_umount:
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* Check permission before the @mnt file system is unmounted.
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* @mnt contains the mounted file system.
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* @flags contains the unmount flags, e.g. MNT_FORCE.
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* Return 0 if permission is granted.
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* @sb_pivotroot:
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* Check permission before pivoting the root filesystem.
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* @old_path contains the path for the new location of the
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* current root (put_old).
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* @new_path contains the path for the new root (new_root).
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* Return 0 if permission is granted.
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* @sb_set_mnt_opts:
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* Set the security relevant mount options used for a superblock
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* @sb the superblock to set security mount options for
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* @opts binary data structure containing all lsm mount data
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* @sb_clone_mnt_opts:
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* Copy all security options from a given superblock to another
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* @oldsb old superblock which contain information to clone
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* @newsb new superblock which needs filled in
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* @sb_add_mnt_opt:
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* Add one mount @option to @mnt_opts.
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* @sb_parse_opts_str:
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* Parse a string of security data filling in the opts structure
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* @options string containing all mount options known by the LSM
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* @opts binary data structure usable by the LSM
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* @move_mount:
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* Check permission before a mount is moved.
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* @from_path indicates the mount that is going to be moved.
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* @to_path indicates the mountpoint that will be mounted upon.
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* @dentry_init_security:
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* Compute a context for a dentry as the inode is not yet available
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* since NFSv4 has no label backed by an EA anyway.
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* @dentry dentry to use in calculating the context.
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* @mode mode used to determine resource type.
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* @name name of the last path component used to create file
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* @xattr_name pointer to place the pointer to security xattr name.
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* Caller does not have to free the resulting pointer. Its
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* a pointer to static string.
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* @ctx pointer to place the pointer to the resulting context in.
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* @ctxlen point to place the length of the resulting context.
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* @dentry_create_files_as:
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* Compute a context for a dentry as the inode is not yet available
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* and set that context in passed in creds so that new files are
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* created using that context. Context is calculated using the
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* passed in creds and not the creds of the caller.
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* @dentry dentry to use in calculating the context.
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* @mode mode used to determine resource type.
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* @name name of the last path component used to create file
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* @old creds which should be used for context calculation
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* @new creds to modify
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*
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*
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* Security hooks for inode operations.
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*
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* @inode_alloc_security:
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* Allocate and attach a security structure to @inode->i_security. The
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* i_security field is initialized to NULL when the inode structure is
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* allocated.
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* @inode contains the inode structure.
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* Return 0 if operation was successful.
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* @inode_free_security:
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* @inode contains the inode structure.
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* Deallocate the inode security structure and set @inode->i_security to
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* NULL.
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* @inode_init_security:
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* Obtain the security attribute name suffix and value to set on a newly
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* created inode and set up the incore security field for the new inode.
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* This hook is called by the fs code as part of the inode creation
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* transaction and provides for atomic labeling of the inode, unlike
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* the post_create/mkdir/... hooks called by the VFS. The hook function
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* is expected to allocate the name and value via kmalloc, with the caller
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* being responsible for calling kfree after using them.
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* If the security module does not use security attributes or does
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* not wish to put a security attribute on this particular inode,
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* then it should return -EOPNOTSUPP to skip this processing.
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* @inode contains the inode structure of the newly created inode.
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* @dir contains the inode structure of the parent directory.
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* @qstr contains the last path component of the new object
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* @name will be set to the allocated name suffix (e.g. selinux).
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* @value will be set to the allocated attribute value.
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* @len will be set to the length of the value.
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* Returns 0 if @name and @value have been successfully set,
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* -EOPNOTSUPP if no security attribute is needed, or
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* -ENOMEM on memory allocation failure.
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* @inode_init_security_anon:
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* Set up the incore security field for the new anonymous inode
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* and return whether the inode creation is permitted by the security
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* module or not.
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* @inode contains the inode structure
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* @name name of the anonymous inode class
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* @context_inode optional related inode
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* Returns 0 on success, -EACCES if the security module denies the
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* creation of this inode, or another -errno upon other errors.
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* @inode_create:
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* Check permission to create a regular file.
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* @dir contains inode structure of the parent of the new file.
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* @dentry contains the dentry structure for the file to be created.
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* @mode contains the file mode of the file to be created.
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* Return 0 if permission is granted.
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* @inode_link:
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* Check permission before creating a new hard link to a file.
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* @old_dentry contains the dentry structure for an existing
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* link to the file.
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* @dir contains the inode structure of the parent directory
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* of the new link.
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* @new_dentry contains the dentry structure for the new link.
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* Return 0 if permission is granted.
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* @path_link:
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* Check permission before creating a new hard link to a file.
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* @old_dentry contains the dentry structure for an existing link
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* to the file.
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* @new_dir contains the path structure of the parent directory of
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* the new link.
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* @new_dentry contains the dentry structure for the new link.
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* Return 0 if permission is granted.
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* @inode_unlink:
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* Check the permission to remove a hard link to a file.
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* @dir contains the inode structure of parent directory of the file.
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* @dentry contains the dentry structure for file to be unlinked.
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* Return 0 if permission is granted.
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* @path_unlink:
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* Check the permission to remove a hard link to a file.
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* @dir contains the path structure of parent directory of the file.
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* @dentry contains the dentry structure for file to be unlinked.
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* Return 0 if permission is granted.
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* @inode_symlink:
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* Check the permission to create a symbolic link to a file.
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* @dir contains the inode structure of parent directory of
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* the symbolic link.
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* @dentry contains the dentry structure of the symbolic link.
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* @old_name contains the pathname of file.
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* Return 0 if permission is granted.
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* @path_symlink:
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* Check the permission to create a symbolic link to a file.
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* @dir contains the path structure of parent directory of
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* the symbolic link.
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* @dentry contains the dentry structure of the symbolic link.
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* @old_name contains the pathname of file.
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* Return 0 if permission is granted.
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* @inode_mkdir:
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* Check permissions to create a new directory in the existing directory
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* associated with inode structure @dir.
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* @dir contains the inode structure of parent of the directory
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* to be created.
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* @dentry contains the dentry structure of new directory.
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* @mode contains the mode of new directory.
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* Return 0 if permission is granted.
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* @path_mkdir:
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* Check permissions to create a new directory in the existing directory
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* associated with path structure @path.
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* @dir contains the path structure of parent of the directory
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* to be created.
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* @dentry contains the dentry structure of new directory.
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* @mode contains the mode of new directory.
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* Return 0 if permission is granted.
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* @inode_rmdir:
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* Check the permission to remove a directory.
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* @dir contains the inode structure of parent of the directory
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* to be removed.
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* @dentry contains the dentry structure of directory to be removed.
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* Return 0 if permission is granted.
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* @path_rmdir:
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* Check the permission to remove a directory.
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* @dir contains the path structure of parent of the directory to be
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* removed.
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* @dentry contains the dentry structure of directory to be removed.
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* Return 0 if permission is granted.
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* @inode_mknod:
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* Check permissions when creating a special file (or a socket or a fifo
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* file created via the mknod system call). Note that if mknod operation
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* is being done for a regular file, then the create hook will be called
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* and not this hook.
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* @dir contains the inode structure of parent of the new file.
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* @dentry contains the dentry structure of the new file.
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* @mode contains the mode of the new file.
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* @dev contains the device number.
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* Return 0 if permission is granted.
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* @path_mknod:
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* Check permissions when creating a file. Note that this hook is called
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* even if mknod operation is being done for a regular file.
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* @dir contains the path structure of parent of the new file.
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* @dentry contains the dentry structure of the new file.
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* @mode contains the mode of the new file.
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* @dev contains the undecoded device number. Use new_decode_dev() to get
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* the decoded device number.
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* Return 0 if permission is granted.
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* @inode_rename:
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* Check for permission to rename a file or directory.
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* @old_dir contains the inode structure for parent of the old link.
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* @old_dentry contains the dentry structure of the old link.
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* @new_dir contains the inode structure for parent of the new link.
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* @new_dentry contains the dentry structure of the new link.
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* Return 0 if permission is granted.
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* @path_rename:
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* Check for permission to rename a file or directory.
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* @old_dir contains the path structure for parent of the old link.
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* @old_dentry contains the dentry structure of the old link.
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* @new_dir contains the path structure for parent of the new link.
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* @new_dentry contains the dentry structure of the new link.
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* Return 0 if permission is granted.
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* @path_chmod:
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* Check for permission to change a mode of the file @path. The new
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* mode is specified in @mode.
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* @path contains the path structure of the file to change the mode.
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* @mode contains the new DAC's permission, which is a bitmask of
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* constants from <include/uapi/linux/stat.h>
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* Return 0 if permission is granted.
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* @path_chown:
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* Check for permission to change owner/group of a file or directory.
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* @path contains the path structure.
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* @uid contains new owner's ID.
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* @gid contains new group's ID.
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* Return 0 if permission is granted.
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* @path_chroot:
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* Check for permission to change root directory.
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* @path contains the path structure.
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* Return 0 if permission is granted.
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* @path_notify:
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* Check permissions before setting a watch on events as defined by @mask,
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* on an object at @path, whose type is defined by @obj_type.
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* @inode_readlink:
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* Check the permission to read the symbolic link.
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* @dentry contains the dentry structure for the file link.
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* Return 0 if permission is granted.
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* @inode_follow_link:
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* Check permission to follow a symbolic link when looking up a pathname.
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* @dentry contains the dentry structure for the link.
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* @inode contains the inode, which itself is not stable in RCU-walk
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* @rcu indicates whether we are in RCU-walk mode.
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* Return 0 if permission is granted.
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* @inode_permission:
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* Check permission before accessing an inode. This hook is called by the
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* existing Linux permission function, so a security module can use it to
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* provide additional checking for existing Linux permission checks.
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* Notice that this hook is called when a file is opened (as well as many
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* other operations), whereas the file_security_ops permission hook is
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* called when the actual read/write operations are performed.
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* @inode contains the inode structure to check.
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* @mask contains the permission mask.
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* Return 0 if permission is granted.
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* @inode_setattr:
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* Check permission before setting file attributes. Note that the kernel
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* call to notify_change is performed from several locations, whenever
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* file attributes change (such as when a file is truncated, chown/chmod
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* operations, transferring disk quotas, etc).
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* @dentry contains the dentry structure for the file.
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* @attr is the iattr structure containing the new file attributes.
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* Return 0 if permission is granted.
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* @path_truncate:
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* Check permission before truncating a file.
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* @path contains the path structure for the file.
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* Return 0 if permission is granted.
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* @inode_getattr:
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* Check permission before obtaining file attributes.
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* @path contains the path structure for the file.
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* Return 0 if permission is granted.
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* @inode_setxattr:
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* Check permission before setting the extended attributes
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* @value identified by @name for @dentry.
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* Return 0 if permission is granted.
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* @inode_post_setxattr:
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* Update inode security field after successful setxattr operation.
|
|
* @value identified by @name for @dentry.
|
|
* @inode_getxattr:
|
|
* Check permission before obtaining the extended attributes
|
|
* identified by @name for @dentry.
|
|
* Return 0 if permission is granted.
|
|
* @inode_listxattr:
|
|
* Check permission before obtaining the list of extended attribute
|
|
* names for @dentry.
|
|
* Return 0 if permission is granted.
|
|
* @inode_removexattr:
|
|
* Check permission before removing the extended attribute
|
|
* identified by @name for @dentry.
|
|
* Return 0 if permission is granted.
|
|
* @inode_getsecurity:
|
|
* Retrieve a copy of the extended attribute representation of the
|
|
* security label associated with @name for @inode via @buffer. Note that
|
|
* @name is the remainder of the attribute name after the security prefix
|
|
* has been removed. @alloc is used to specify of the call should return a
|
|
* value via the buffer or just the value length Return size of buffer on
|
|
* success.
|
|
* @inode_setsecurity:
|
|
* Set the security label associated with @name for @inode from the
|
|
* extended attribute value @value. @size indicates the size of the
|
|
* @value in bytes. @flags may be XATTR_CREATE, XATTR_REPLACE, or 0.
|
|
* Note that @name is the remainder of the attribute name after the
|
|
* security. prefix has been removed.
|
|
* Return 0 on success.
|
|
* @inode_listsecurity:
|
|
* Copy the extended attribute names for the security labels
|
|
* associated with @inode into @buffer. The maximum size of @buffer
|
|
* is specified by @buffer_size. @buffer may be NULL to request
|
|
* the size of the buffer required.
|
|
* Returns number of bytes used/required on success.
|
|
* @inode_need_killpriv:
|
|
* Called when an inode has been changed.
|
|
* @dentry is the dentry being changed.
|
|
* Return <0 on error to abort the inode change operation.
|
|
* Return 0 if inode_killpriv does not need to be called.
|
|
* Return >0 if inode_killpriv does need to be called.
|
|
* @inode_killpriv:
|
|
* The setuid bit is being removed. Remove similar security labels.
|
|
* Called with the dentry->d_inode->i_mutex held.
|
|
* @mnt_userns: user namespace of the mount
|
|
* @dentry is the dentry being changed.
|
|
* Return 0 on success. If error is returned, then the operation
|
|
* causing setuid bit removal is failed.
|
|
* @inode_getsecid:
|
|
* Get the secid associated with the node.
|
|
* @inode contains a pointer to the inode.
|
|
* @secid contains a pointer to the location where result will be saved.
|
|
* In case of failure, @secid will be set to zero.
|
|
* @inode_copy_up:
|
|
* A file is about to be copied up from lower layer to upper layer of
|
|
* overlay filesystem. Security module can prepare a set of new creds
|
|
* and modify as need be and return new creds. Caller will switch to
|
|
* new creds temporarily to create new file and release newly allocated
|
|
* creds.
|
|
* @src indicates the union dentry of file that is being copied up.
|
|
* @new pointer to pointer to return newly allocated creds.
|
|
* Returns 0 on success or a negative error code on error.
|
|
* @inode_copy_up_xattr:
|
|
* Filter the xattrs being copied up when a unioned file is copied
|
|
* up from a lower layer to the union/overlay layer.
|
|
* @name indicates the name of the xattr.
|
|
* Returns 0 to accept the xattr, 1 to discard the xattr, -EOPNOTSUPP if
|
|
* security module does not know about attribute or a negative error code
|
|
* to abort the copy up. Note that the caller is responsible for reading
|
|
* and writing the xattrs as this hook is merely a filter.
|
|
* @d_instantiate:
|
|
* Fill in @inode security information for a @dentry if allowed.
|
|
* @getprocattr:
|
|
* Read attribute @name for process @p and store it into @value if allowed.
|
|
* @setprocattr:
|
|
* Write (set) attribute @name to @value, size @size if allowed.
|
|
*
|
|
* Security hooks for kernfs node operations
|
|
*
|
|
* @kernfs_init_security:
|
|
* Initialize the security context of a newly created kernfs node based
|
|
* on its own and its parent's attributes.
|
|
*
|
|
* @kn_dir the parent kernfs node
|
|
* @kn the new child kernfs node
|
|
*
|
|
* Security hooks for file operations
|
|
*
|
|
* @file_permission:
|
|
* Check file permissions before accessing an open file. This hook is
|
|
* called by various operations that read or write files. A security
|
|
* module can use this hook to perform additional checking on these
|
|
* operations, e.g. to revalidate permissions on use to support privilege
|
|
* bracketing or policy changes. Notice that this hook is used when the
|
|
* actual read/write operations are performed, whereas the
|
|
* inode_security_ops hook is called when a file is opened (as well as
|
|
* many other operations).
|
|
* Caveat: Although this hook can be used to revalidate permissions for
|
|
* various system call operations that read or write files, it does not
|
|
* address the revalidation of permissions for memory-mapped files.
|
|
* Security modules must handle this separately if they need such
|
|
* revalidation.
|
|
* @file contains the file structure being accessed.
|
|
* @mask contains the requested permissions.
|
|
* Return 0 if permission is granted.
|
|
* @file_alloc_security:
|
|
* Allocate and attach a security structure to the file->f_security field.
|
|
* The security field is initialized to NULL when the structure is first
|
|
* created.
|
|
* @file contains the file structure to secure.
|
|
* Return 0 if the hook is successful and permission is granted.
|
|
* @file_free_security:
|
|
* Deallocate and free any security structures stored in file->f_security.
|
|
* @file contains the file structure being modified.
|
|
* @file_ioctl:
|
|
* @file contains the file structure.
|
|
* @cmd contains the operation to perform.
|
|
* @arg contains the operational arguments.
|
|
* Check permission for an ioctl operation on @file. Note that @arg
|
|
* sometimes represents a user space pointer; in other cases, it may be a
|
|
* simple integer value. When @arg represents a user space pointer, it
|
|
* should never be used by the security module.
|
|
* Return 0 if permission is granted.
|
|
* @mmap_addr :
|
|
* Check permissions for a mmap operation at @addr.
|
|
* @addr contains virtual address that will be used for the operation.
|
|
* Return 0 if permission is granted.
|
|
* @mmap_file :
|
|
* Check permissions for a mmap operation. The @file may be NULL, e.g.
|
|
* if mapping anonymous memory.
|
|
* @file contains the file structure for file to map (may be NULL).
|
|
* @reqprot contains the protection requested by the application.
|
|
* @prot contains the protection that will be applied by the kernel.
|
|
* @flags contains the operational flags.
|
|
* Return 0 if permission is granted.
|
|
* @file_mprotect:
|
|
* Check permissions before changing memory access permissions.
|
|
* @vma contains the memory region to modify.
|
|
* @reqprot contains the protection requested by the application.
|
|
* @prot contains the protection that will be applied by the kernel.
|
|
* Return 0 if permission is granted.
|
|
* @file_lock:
|
|
* Check permission before performing file locking operations.
|
|
* Note the hook mediates both flock and fcntl style locks.
|
|
* @file contains the file structure.
|
|
* @cmd contains the posix-translated lock operation to perform
|
|
* (e.g. F_RDLCK, F_WRLCK).
|
|
* Return 0 if permission is granted.
|
|
* @file_fcntl:
|
|
* Check permission before allowing the file operation specified by @cmd
|
|
* from being performed on the file @file. Note that @arg sometimes
|
|
* represents a user space pointer; in other cases, it may be a simple
|
|
* integer value. When @arg represents a user space pointer, it should
|
|
* never be used by the security module.
|
|
* @file contains the file structure.
|
|
* @cmd contains the operation to be performed.
|
|
* @arg contains the operational arguments.
|
|
* Return 0 if permission is granted.
|
|
* @file_set_fowner:
|
|
* Save owner security information (typically from current->security) in
|
|
* file->f_security for later use by the send_sigiotask hook.
|
|
* @file contains the file structure to update.
|
|
* Return 0 on success.
|
|
* @file_send_sigiotask:
|
|
* Check permission for the file owner @fown to send SIGIO or SIGURG to the
|
|
* process @tsk. Note that this hook is sometimes called from interrupt.
|
|
* Note that the fown_struct, @fown, is never outside the context of a
|
|
* struct file, so the file structure (and associated security information)
|
|
* can always be obtained: container_of(fown, struct file, f_owner)
|
|
* @tsk contains the structure of task receiving signal.
|
|
* @fown contains the file owner information.
|
|
* @sig is the signal that will be sent. When 0, kernel sends SIGIO.
|
|
* Return 0 if permission is granted.
|
|
* @file_receive:
|
|
* This hook allows security modules to control the ability of a process
|
|
* to receive an open file descriptor via socket IPC.
|
|
* @file contains the file structure being received.
|
|
* Return 0 if permission is granted.
|
|
* @file_open:
|
|
* Save open-time permission checking state for later use upon
|
|
* file_permission, and recheck access if anything has changed
|
|
* since inode_permission.
|
|
*
|
|
* Security hooks for task operations.
|
|
*
|
|
* @task_alloc:
|
|
* @task task being allocated.
|
|
* @clone_flags contains the flags indicating what should be shared.
|
|
* Handle allocation of task-related resources.
|
|
* Returns a zero on success, negative values on failure.
|
|
* @task_free:
|
|
* @task task about to be freed.
|
|
* Handle release of task-related resources. (Note that this can be called
|
|
* from interrupt context.)
|
|
* @cred_alloc_blank:
|
|
* @cred points to the credentials.
|
|
* @gfp indicates the atomicity of any memory allocations.
|
|
* Only allocate sufficient memory and attach to @cred such that
|
|
* cred_transfer() will not get ENOMEM.
|
|
* @cred_free:
|
|
* @cred points to the credentials.
|
|
* Deallocate and clear the cred->security field in a set of credentials.
|
|
* @cred_prepare:
|
|
* @new points to the new credentials.
|
|
* @old points to the original credentials.
|
|
* @gfp indicates the atomicity of any memory allocations.
|
|
* Prepare a new set of credentials by copying the data from the old set.
|
|
* @cred_transfer:
|
|
* @new points to the new credentials.
|
|
* @old points to the original credentials.
|
|
* Transfer data from original creds to new creds
|
|
* @cred_getsecid:
|
|
* Retrieve the security identifier of the cred structure @c
|
|
* @c contains the credentials, secid will be placed into @secid.
|
|
* In case of failure, @secid will be set to zero.
|
|
* @kernel_act_as:
|
|
* Set the credentials for a kernel service to act as (subjective context).
|
|
* @new points to the credentials to be modified.
|
|
* @secid specifies the security ID to be set
|
|
* The current task must be the one that nominated @secid.
|
|
* Return 0 if successful.
|
|
* @kernel_create_files_as:
|
|
* Set the file creation context in a set of credentials to be the same as
|
|
* the objective context of the specified inode.
|
|
* @new points to the credentials to be modified.
|
|
* @inode points to the inode to use as a reference.
|
|
* The current task must be the one that nominated @inode.
|
|
* Return 0 if successful.
|
|
* @kernel_module_request:
|
|
* Ability to trigger the kernel to automatically upcall to userspace for
|
|
* userspace to load a kernel module with the given name.
|
|
* @kmod_name name of the module requested by the kernel
|
|
* Return 0 if successful.
|
|
* @kernel_load_data:
|
|
* Load data provided by userspace.
|
|
* @id kernel load data identifier
|
|
* @contents if a subsequent @kernel_post_load_data will be called.
|
|
* Return 0 if permission is granted.
|
|
* @kernel_post_load_data:
|
|
* Load data provided by a non-file source (usually userspace buffer).
|
|
* @buf pointer to buffer containing the data contents.
|
|
* @size length of the data contents.
|
|
* @id kernel load data identifier
|
|
* @description a text description of what was loaded, @id-specific
|
|
* Return 0 if permission is granted.
|
|
* This must be paired with a prior @kernel_load_data call that had
|
|
* @contents set to true.
|
|
* @kernel_read_file:
|
|
* Read a file specified by userspace.
|
|
* @file contains the file structure pointing to the file being read
|
|
* by the kernel.
|
|
* @id kernel read file identifier
|
|
* @contents if a subsequent @kernel_post_read_file will be called.
|
|
* Return 0 if permission is granted.
|
|
* @kernel_post_read_file:
|
|
* Read a file specified by userspace.
|
|
* @file contains the file structure pointing to the file being read
|
|
* by the kernel.
|
|
* @buf pointer to buffer containing the file contents.
|
|
* @size length of the file contents.
|
|
* @id kernel read file identifier
|
|
* This must be paired with a prior @kernel_read_file call that had
|
|
* @contents set to true.
|
|
* Return 0 if permission is granted.
|
|
* @task_fix_setuid:
|
|
* Update the module's state after setting one or more of the user
|
|
* identity attributes of the current process. The @flags parameter
|
|
* indicates which of the set*uid system calls invoked this hook. If
|
|
* @new is the set of credentials that will be installed. Modifications
|
|
* should be made to this rather than to @current->cred.
|
|
* @old is the set of credentials that are being replaces
|
|
* @flags contains one of the LSM_SETID_* values.
|
|
* Return 0 on success.
|
|
* @task_fix_setgid:
|
|
* Update the module's state after setting one or more of the group
|
|
* identity attributes of the current process. The @flags parameter
|
|
* indicates which of the set*gid system calls invoked this hook.
|
|
* @new is the set of credentials that will be installed. Modifications
|
|
* should be made to this rather than to @current->cred.
|
|
* @old is the set of credentials that are being replaced.
|
|
* @flags contains one of the LSM_SETID_* values.
|
|
* Return 0 on success.
|
|
* @task_setpgid:
|
|
* Check permission before setting the process group identifier of the
|
|
* process @p to @pgid.
|
|
* @p contains the task_struct for process being modified.
|
|
* @pgid contains the new pgid.
|
|
* Return 0 if permission is granted.
|
|
* @task_getpgid:
|
|
* Check permission before getting the process group identifier of the
|
|
* process @p.
|
|
* @p contains the task_struct for the process.
|
|
* Return 0 if permission is granted.
|
|
* @task_getsid:
|
|
* Check permission before getting the session identifier of the process
|
|
* @p.
|
|
* @p contains the task_struct for the process.
|
|
* Return 0 if permission is granted.
|
|
* @task_getsecid_subj:
|
|
* Retrieve the subjective security identifier of the task_struct in @p
|
|
* and return it in @secid. Special care must be taken to ensure that @p
|
|
* is the either the "current" task, or the caller has exclusive access
|
|
* to @p.
|
|
* In case of failure, @secid will be set to zero.
|
|
* @task_getsecid_obj:
|
|
* Retrieve the objective security identifier of the task_struct in @p
|
|
* and return it in @secid.
|
|
* In case of failure, @secid will be set to zero.
|
|
*
|
|
* @task_setnice:
|
|
* Check permission before setting the nice value of @p to @nice.
|
|
* @p contains the task_struct of process.
|
|
* @nice contains the new nice value.
|
|
* Return 0 if permission is granted.
|
|
* @task_setioprio:
|
|
* Check permission before setting the ioprio value of @p to @ioprio.
|
|
* @p contains the task_struct of process.
|
|
* @ioprio contains the new ioprio value
|
|
* Return 0 if permission is granted.
|
|
* @task_getioprio:
|
|
* Check permission before getting the ioprio value of @p.
|
|
* @p contains the task_struct of process.
|
|
* Return 0 if permission is granted.
|
|
* @task_prlimit:
|
|
* Check permission before getting and/or setting the resource limits of
|
|
* another task.
|
|
* @cred points to the cred structure for the current task.
|
|
* @tcred points to the cred structure for the target task.
|
|
* @flags contains the LSM_PRLIMIT_* flag bits indicating whether the
|
|
* resource limits are being read, modified, or both.
|
|
* Return 0 if permission is granted.
|
|
* @task_setrlimit:
|
|
* Check permission before setting the resource limits of process @p
|
|
* for @resource to @new_rlim. The old resource limit values can
|
|
* be examined by dereferencing (p->signal->rlim + resource).
|
|
* @p points to the task_struct for the target task's group leader.
|
|
* @resource contains the resource whose limit is being set.
|
|
* @new_rlim contains the new limits for @resource.
|
|
* Return 0 if permission is granted.
|
|
* @task_setscheduler:
|
|
* Check permission before setting scheduling policy and/or parameters of
|
|
* process @p.
|
|
* @p contains the task_struct for process.
|
|
* Return 0 if permission is granted.
|
|
* @task_getscheduler:
|
|
* Check permission before obtaining scheduling information for process
|
|
* @p.
|
|
* @p contains the task_struct for process.
|
|
* Return 0 if permission is granted.
|
|
* @task_movememory:
|
|
* Check permission before moving memory owned by process @p.
|
|
* @p contains the task_struct for process.
|
|
* Return 0 if permission is granted.
|
|
* @task_kill:
|
|
* Check permission before sending signal @sig to @p. @info can be NULL,
|
|
* the constant 1, or a pointer to a kernel_siginfo structure. If @info is 1 or
|
|
* SI_FROMKERNEL(info) is true, then the signal should be viewed as coming
|
|
* from the kernel and should typically be permitted.
|
|
* SIGIO signals are handled separately by the send_sigiotask hook in
|
|
* file_security_ops.
|
|
* @p contains the task_struct for process.
|
|
* @info contains the signal information.
|
|
* @sig contains the signal value.
|
|
* @cred contains the cred of the process where the signal originated, or
|
|
* NULL if the current task is the originator.
|
|
* Return 0 if permission is granted.
|
|
* @task_prctl:
|
|
* Check permission before performing a process control operation on the
|
|
* current process.
|
|
* @option contains the operation.
|
|
* @arg2 contains a argument.
|
|
* @arg3 contains a argument.
|
|
* @arg4 contains a argument.
|
|
* @arg5 contains a argument.
|
|
* Return -ENOSYS if no-one wanted to handle this op, any other value to
|
|
* cause prctl() to return immediately with that value.
|
|
* @task_to_inode:
|
|
* Set the security attributes for an inode based on an associated task's
|
|
* security attributes, e.g. for /proc/pid inodes.
|
|
* @p contains the task_struct for the task.
|
|
* @inode contains the inode structure for the inode.
|
|
*
|
|
* Security hooks for Netlink messaging.
|
|
*
|
|
* @netlink_send:
|
|
* Save security information for a netlink message so that permission
|
|
* checking can be performed when the message is processed. The security
|
|
* information can be saved using the eff_cap field of the
|
|
* netlink_skb_parms structure. Also may be used to provide fine
|
|
* grained control over message transmission.
|
|
* @sk associated sock of task sending the message.
|
|
* @skb contains the sk_buff structure for the netlink message.
|
|
* Return 0 if the information was successfully saved and message
|
|
* is allowed to be transmitted.
|
|
*
|
|
* Security hooks for Unix domain networking.
|
|
*
|
|
* @unix_stream_connect:
|
|
* Check permissions before establishing a Unix domain stream connection
|
|
* between @sock and @other.
|
|
* @sock contains the sock structure.
|
|
* @other contains the peer sock structure.
|
|
* @newsk contains the new sock structure.
|
|
* Return 0 if permission is granted.
|
|
* @unix_may_send:
|
|
* Check permissions before connecting or sending datagrams from @sock to
|
|
* @other.
|
|
* @sock contains the socket structure.
|
|
* @other contains the peer socket structure.
|
|
* Return 0 if permission is granted.
|
|
*
|
|
* The @unix_stream_connect and @unix_may_send hooks were necessary because
|
|
* Linux provides an alternative to the conventional file name space for Unix
|
|
* domain sockets. Whereas binding and connecting to sockets in the file name
|
|
* space is mediated by the typical file permissions (and caught by the mknod
|
|
* and permission hooks in inode_security_ops), binding and connecting to
|
|
* sockets in the abstract name space is completely unmediated. Sufficient
|
|
* control of Unix domain sockets in the abstract name space isn't possible
|
|
* using only the socket layer hooks, since we need to know the actual target
|
|
* socket, which is not looked up until we are inside the af_unix code.
|
|
*
|
|
* Security hooks for socket operations.
|
|
*
|
|
* @socket_create:
|
|
* Check permissions prior to creating a new socket.
|
|
* @family contains the requested protocol family.
|
|
* @type contains the requested communications type.
|
|
* @protocol contains the requested protocol.
|
|
* @kern set to 1 if a kernel socket.
|
|
* Return 0 if permission is granted.
|
|
* @socket_post_create:
|
|
* This hook allows a module to update or allocate a per-socket security
|
|
* structure. Note that the security field was not added directly to the
|
|
* socket structure, but rather, the socket security information is stored
|
|
* in the associated inode. Typically, the inode alloc_security hook will
|
|
* allocate and attach security information to
|
|
* SOCK_INODE(sock)->i_security. This hook may be used to update the
|
|
* SOCK_INODE(sock)->i_security field with additional information that
|
|
* wasn't available when the inode was allocated.
|
|
* @sock contains the newly created socket structure.
|
|
* @family contains the requested protocol family.
|
|
* @type contains the requested communications type.
|
|
* @protocol contains the requested protocol.
|
|
* @kern set to 1 if a kernel socket.
|
|
* @socket_socketpair:
|
|
* Check permissions before creating a fresh pair of sockets.
|
|
* @socka contains the first socket structure.
|
|
* @sockb contains the second socket structure.
|
|
* Return 0 if permission is granted and the connection was established.
|
|
* @socket_bind:
|
|
* Check permission before socket protocol layer bind operation is
|
|
* performed and the socket @sock is bound to the address specified in the
|
|
* @address parameter.
|
|
* @sock contains the socket structure.
|
|
* @address contains the address to bind to.
|
|
* @addrlen contains the length of address.
|
|
* Return 0 if permission is granted.
|
|
* @socket_connect:
|
|
* Check permission before socket protocol layer connect operation
|
|
* attempts to connect socket @sock to a remote address, @address.
|
|
* @sock contains the socket structure.
|
|
* @address contains the address of remote endpoint.
|
|
* @addrlen contains the length of address.
|
|
* Return 0 if permission is granted.
|
|
* @socket_listen:
|
|
* Check permission before socket protocol layer listen operation.
|
|
* @sock contains the socket structure.
|
|
* @backlog contains the maximum length for the pending connection queue.
|
|
* Return 0 if permission is granted.
|
|
* @socket_accept:
|
|
* Check permission before accepting a new connection. Note that the new
|
|
* socket, @newsock, has been created and some information copied to it,
|
|
* but the accept operation has not actually been performed.
|
|
* @sock contains the listening socket structure.
|
|
* @newsock contains the newly created server socket for connection.
|
|
* Return 0 if permission is granted.
|
|
* @socket_sendmsg:
|
|
* Check permission before transmitting a message to another socket.
|
|
* @sock contains the socket structure.
|
|
* @msg contains the message to be transmitted.
|
|
* @size contains the size of message.
|
|
* Return 0 if permission is granted.
|
|
* @socket_recvmsg:
|
|
* Check permission before receiving a message from a socket.
|
|
* @sock contains the socket structure.
|
|
* @msg contains the message structure.
|
|
* @size contains the size of message structure.
|
|
* @flags contains the operational flags.
|
|
* Return 0 if permission is granted.
|
|
* @socket_getsockname:
|
|
* Check permission before the local address (name) of the socket object
|
|
* @sock is retrieved.
|
|
* @sock contains the socket structure.
|
|
* Return 0 if permission is granted.
|
|
* @socket_getpeername:
|
|
* Check permission before the remote address (name) of a socket object
|
|
* @sock is retrieved.
|
|
* @sock contains the socket structure.
|
|
* Return 0 if permission is granted.
|
|
* @socket_getsockopt:
|
|
* Check permissions before retrieving the options associated with socket
|
|
* @sock.
|
|
* @sock contains the socket structure.
|
|
* @level contains the protocol level to retrieve option from.
|
|
* @optname contains the name of option to retrieve.
|
|
* Return 0 if permission is granted.
|
|
* @socket_setsockopt:
|
|
* Check permissions before setting the options associated with socket
|
|
* @sock.
|
|
* @sock contains the socket structure.
|
|
* @level contains the protocol level to set options for.
|
|
* @optname contains the name of the option to set.
|
|
* Return 0 if permission is granted.
|
|
* @socket_shutdown:
|
|
* Checks permission before all or part of a connection on the socket
|
|
* @sock is shut down.
|
|
* @sock contains the socket structure.
|
|
* @how contains the flag indicating how future sends and receives
|
|
* are handled.
|
|
* Return 0 if permission is granted.
|
|
* @socket_sock_rcv_skb:
|
|
* Check permissions on incoming network packets. This hook is distinct
|
|
* from Netfilter's IP input hooks since it is the first time that the
|
|
* incoming sk_buff @skb has been associated with a particular socket, @sk.
|
|
* Must not sleep inside this hook because some callers hold spinlocks.
|
|
* @sk contains the sock (not socket) associated with the incoming sk_buff.
|
|
* @skb contains the incoming network data.
|
|
* @socket_getpeersec_stream:
|
|
* This hook allows the security module to provide peer socket security
|
|
* state for unix or connected tcp sockets to userspace via getsockopt
|
|
* SO_GETPEERSEC. For tcp sockets this can be meaningful if the
|
|
* socket is associated with an ipsec SA.
|
|
* @sock is the local socket.
|
|
* @optval userspace memory where the security state is to be copied.
|
|
* @optlen userspace int where the module should copy the actual length
|
|
* of the security state.
|
|
* @len as input is the maximum length to copy to userspace provided
|
|
* by the caller.
|
|
* Return 0 if all is well, otherwise, typical getsockopt return
|
|
* values.
|
|
* @socket_getpeersec_dgram:
|
|
* This hook allows the security module to provide peer socket security
|
|
* state for udp sockets on a per-packet basis to userspace via
|
|
* getsockopt SO_GETPEERSEC. The application must first have indicated
|
|
* the IP_PASSSEC option via getsockopt. It can then retrieve the
|
|
* security state returned by this hook for a packet via the SCM_SECURITY
|
|
* ancillary message type.
|
|
* @sock contains the peer socket. May be NULL.
|
|
* @skb is the sk_buff for the packet being queried. May be NULL.
|
|
* @secid pointer to store the secid of the packet.
|
|
* Return 0 on success, error on failure.
|
|
* @sk_alloc_security:
|
|
* Allocate and attach a security structure to the sk->sk_security field,
|
|
* which is used to copy security attributes between local stream sockets.
|
|
* @sk_free_security:
|
|
* Deallocate security structure.
|
|
* @sk_clone_security:
|
|
* Clone/copy security structure.
|
|
* @sk_getsecid:
|
|
* Retrieve the LSM-specific secid for the sock to enable caching
|
|
* of network authorizations.
|
|
* @sock_graft:
|
|
* Sets the socket's isec sid to the sock's sid.
|
|
* @inet_conn_request:
|
|
* Sets the openreq's sid to socket's sid with MLS portion taken
|
|
* from peer sid.
|
|
* @inet_csk_clone:
|
|
* Sets the new child socket's sid to the openreq sid.
|
|
* @inet_conn_established:
|
|
* Sets the connection's peersid to the secmark on skb.
|
|
* @secmark_relabel_packet:
|
|
* check if the process should be allowed to relabel packets to
|
|
* the given secid
|
|
* @secmark_refcount_inc:
|
|
* tells the LSM to increment the number of secmark labeling rules loaded
|
|
* @secmark_refcount_dec:
|
|
* tells the LSM to decrement the number of secmark labeling rules loaded
|
|
* @req_classify_flow:
|
|
* Sets the flow's sid to the openreq sid.
|
|
* @tun_dev_alloc_security:
|
|
* This hook allows a module to allocate a security structure for a TUN
|
|
* device.
|
|
* @security pointer to a security structure pointer.
|
|
* Returns a zero on success, negative values on failure.
|
|
* @tun_dev_free_security:
|
|
* This hook allows a module to free the security structure for a TUN
|
|
* device.
|
|
* @security pointer to the TUN device's security structure
|
|
* @tun_dev_create:
|
|
* Check permissions prior to creating a new TUN device.
|
|
* @tun_dev_attach_queue:
|
|
* Check permissions prior to attaching to a TUN device queue.
|
|
* @security pointer to the TUN device's security structure.
|
|
* @tun_dev_attach:
|
|
* This hook can be used by the module to update any security state
|
|
* associated with the TUN device's sock structure.
|
|
* @sk contains the existing sock structure.
|
|
* @security pointer to the TUN device's security structure.
|
|
* @tun_dev_open:
|
|
* This hook can be used by the module to update any security state
|
|
* associated with the TUN device's security structure.
|
|
* @security pointer to the TUN devices's security structure.
|
|
*
|
|
* Security hooks for SCTP
|
|
*
|
|
* @sctp_assoc_request:
|
|
* Passes the @asoc and @chunk->skb of the association INIT packet to
|
|
* the security module.
|
|
* @asoc pointer to sctp association structure.
|
|
* @skb pointer to skbuff of association packet.
|
|
* Return 0 on success, error on failure.
|
|
* @sctp_bind_connect:
|
|
* Validiate permissions required for each address associated with sock
|
|
* @sk. Depending on @optname, the addresses will be treated as either
|
|
* for a connect or bind service. The @addrlen is calculated on each
|
|
* ipv4 and ipv6 address using sizeof(struct sockaddr_in) or
|
|
* sizeof(struct sockaddr_in6).
|
|
* @sk pointer to sock structure.
|
|
* @optname name of the option to validate.
|
|
* @address list containing one or more ipv4/ipv6 addresses.
|
|
* @addrlen total length of address(s).
|
|
* Return 0 on success, error on failure.
|
|
* @sctp_sk_clone:
|
|
* Called whenever a new socket is created by accept(2) (i.e. a TCP
|
|
* style socket) or when a socket is 'peeled off' e.g userspace
|
|
* calls sctp_peeloff(3).
|
|
* @asoc pointer to current sctp association structure.
|
|
* @sk pointer to current sock structure.
|
|
* @newsk pointer to new sock structure.
|
|
*
|
|
* Security hooks for Infiniband
|
|
*
|
|
* @ib_pkey_access:
|
|
* Check permission to access a pkey when modifing a QP.
|
|
* @subnet_prefix the subnet prefix of the port being used.
|
|
* @pkey the pkey to be accessed.
|
|
* @sec pointer to a security structure.
|
|
* @ib_endport_manage_subnet:
|
|
* Check permissions to send and receive SMPs on a end port.
|
|
* @dev_name the IB device name (i.e. mlx4_0).
|
|
* @port_num the port number.
|
|
* @sec pointer to a security structure.
|
|
* @ib_alloc_security:
|
|
* Allocate a security structure for Infiniband objects.
|
|
* @sec pointer to a security structure pointer.
|
|
* Returns 0 on success, non-zero on failure
|
|
* @ib_free_security:
|
|
* Deallocate an Infiniband security structure.
|
|
* @sec contains the security structure to be freed.
|
|
*
|
|
* Security hooks for XFRM operations.
|
|
*
|
|
* @xfrm_policy_alloc_security:
|
|
* @ctxp is a pointer to the xfrm_sec_ctx being added to Security Policy
|
|
* Database used by the XFRM system.
|
|
* @sec_ctx contains the security context information being provided by
|
|
* the user-level policy update program (e.g., setkey).
|
|
* Allocate a security structure to the xp->security field; the security
|
|
* field is initialized to NULL when the xfrm_policy is allocated.
|
|
* Return 0 if operation was successful (memory to allocate, legal context)
|
|
* @gfp is to specify the context for the allocation
|
|
* @xfrm_policy_clone_security:
|
|
* @old_ctx contains an existing xfrm_sec_ctx.
|
|
* @new_ctxp contains a new xfrm_sec_ctx being cloned from old.
|
|
* Allocate a security structure in new_ctxp that contains the
|
|
* information from the old_ctx structure.
|
|
* Return 0 if operation was successful (memory to allocate).
|
|
* @xfrm_policy_free_security:
|
|
* @ctx contains the xfrm_sec_ctx
|
|
* Deallocate xp->security.
|
|
* @xfrm_policy_delete_security:
|
|
* @ctx contains the xfrm_sec_ctx.
|
|
* Authorize deletion of xp->security.
|
|
* @xfrm_state_alloc:
|
|
* @x contains the xfrm_state being added to the Security Association
|
|
* Database by the XFRM system.
|
|
* @sec_ctx contains the security context information being provided by
|
|
* the user-level SA generation program (e.g., setkey or racoon).
|
|
* Allocate a security structure to the x->security field; the security
|
|
* field is initialized to NULL when the xfrm_state is allocated. Set the
|
|
* context to correspond to sec_ctx. Return 0 if operation was successful
|
|
* (memory to allocate, legal context).
|
|
* @xfrm_state_alloc_acquire:
|
|
* @x contains the xfrm_state being added to the Security Association
|
|
* Database by the XFRM system.
|
|
* @polsec contains the policy's security context.
|
|
* @secid contains the secid from which to take the mls portion of the
|
|
* context.
|
|
* Allocate a security structure to the x->security field; the security
|
|
* field is initialized to NULL when the xfrm_state is allocated. Set the
|
|
* context to correspond to secid. Return 0 if operation was successful
|
|
* (memory to allocate, legal context).
|
|
* @xfrm_state_free_security:
|
|
* @x contains the xfrm_state.
|
|
* Deallocate x->security.
|
|
* @xfrm_state_delete_security:
|
|
* @x contains the xfrm_state.
|
|
* Authorize deletion of x->security.
|
|
* @xfrm_policy_lookup:
|
|
* @ctx contains the xfrm_sec_ctx for which the access control is being
|
|
* checked.
|
|
* @fl_secid contains the flow security label that is used to authorize
|
|
* access to the policy xp.
|
|
* @dir contains the direction of the flow (input or output).
|
|
* Check permission when a flow selects a xfrm_policy for processing
|
|
* XFRMs on a packet. The hook is called when selecting either a
|
|
* per-socket policy or a generic xfrm policy.
|
|
* Return 0 if permission is granted, -ESRCH otherwise, or -errno
|
|
* on other errors.
|
|
* @xfrm_state_pol_flow_match:
|
|
* @x contains the state to match.
|
|
* @xp contains the policy to check for a match.
|
|
* @flic contains the flowi_common struct to check for a match.
|
|
* Return 1 if there is a match.
|
|
* @xfrm_decode_session:
|
|
* @skb points to skb to decode.
|
|
* @secid points to the flow key secid to set.
|
|
* @ckall says if all xfrms used should be checked for same secid.
|
|
* Return 0 if ckall is zero or all xfrms used have the same secid.
|
|
*
|
|
* Security hooks affecting all Key Management operations
|
|
*
|
|
* @key_alloc:
|
|
* Permit allocation of a key and assign security data. Note that key does
|
|
* not have a serial number assigned at this point.
|
|
* @key points to the key.
|
|
* @flags is the allocation flags
|
|
* Return 0 if permission is granted, -ve error otherwise.
|
|
* @key_free:
|
|
* Notification of destruction; free security data.
|
|
* @key points to the key.
|
|
* No return value.
|
|
* @key_permission:
|
|
* See whether a specific operational right is granted to a process on a
|
|
* key.
|
|
* @key_ref refers to the key (key pointer + possession attribute bit).
|
|
* @cred points to the credentials to provide the context against which to
|
|
* evaluate the security data on the key.
|
|
* @perm describes the combination of permissions required of this key.
|
|
* Return 0 if permission is granted, -ve error otherwise.
|
|
* @key_getsecurity:
|
|
* Get a textual representation of the security context attached to a key
|
|
* for the purposes of honouring KEYCTL_GETSECURITY. This function
|
|
* allocates the storage for the NUL-terminated string and the caller
|
|
* should free it.
|
|
* @key points to the key to be queried.
|
|
* @_buffer points to a pointer that should be set to point to the
|
|
* resulting string (if no label or an error occurs).
|
|
* Return the length of the string (including terminating NUL) or -ve if
|
|
* an error.
|
|
* May also return 0 (and a NULL buffer pointer) if there is no label.
|
|
*
|
|
* Security hooks affecting all System V IPC operations.
|
|
*
|
|
* @ipc_permission:
|
|
* Check permissions for access to IPC
|
|
* @ipcp contains the kernel IPC permission structure
|
|
* @flag contains the desired (requested) permission set
|
|
* Return 0 if permission is granted.
|
|
* @ipc_getsecid:
|
|
* Get the secid associated with the ipc object.
|
|
* @ipcp contains the kernel IPC permission structure.
|
|
* @secid contains a pointer to the location where result will be saved.
|
|
* In case of failure, @secid will be set to zero.
|
|
*
|
|
* Security hooks for individual messages held in System V IPC message queues
|
|
*
|
|
* @msg_msg_alloc_security:
|
|
* Allocate and attach a security structure to the msg->security field.
|
|
* The security field is initialized to NULL when the structure is first
|
|
* created.
|
|
* @msg contains the message structure to be modified.
|
|
* Return 0 if operation was successful and permission is granted.
|
|
* @msg_msg_free_security:
|
|
* Deallocate the security structure for this message.
|
|
* @msg contains the message structure to be modified.
|
|
*
|
|
* Security hooks for System V IPC Message Queues
|
|
*
|
|
* @msg_queue_alloc_security:
|
|
* Allocate and attach a security structure to the
|
|
* @perm->security field. The security field is initialized to
|
|
* NULL when the structure is first created.
|
|
* @perm contains the IPC permissions of the message queue.
|
|
* Return 0 if operation was successful and permission is granted.
|
|
* @msg_queue_free_security:
|
|
* Deallocate security field @perm->security for the message queue.
|
|
* @perm contains the IPC permissions of the message queue.
|
|
* @msg_queue_associate:
|
|
* Check permission when a message queue is requested through the
|
|
* msgget system call. This hook is only called when returning the
|
|
* message queue identifier for an existing message queue, not when a
|
|
* new message queue is created.
|
|
* @perm contains the IPC permissions of the message queue.
|
|
* @msqflg contains the operation control flags.
|
|
* Return 0 if permission is granted.
|
|
* @msg_queue_msgctl:
|
|
* Check permission when a message control operation specified by @cmd
|
|
* is to be performed on the message queue with permissions @perm.
|
|
* The @perm may be NULL, e.g. for IPC_INFO or MSG_INFO.
|
|
* @perm contains the IPC permissions of the msg queue. May be NULL.
|
|
* @cmd contains the operation to be performed.
|
|
* Return 0 if permission is granted.
|
|
* @msg_queue_msgsnd:
|
|
* Check permission before a message, @msg, is enqueued on the message
|
|
* queue with permissions @perm.
|
|
* @perm contains the IPC permissions of the message queue.
|
|
* @msg contains the message to be enqueued.
|
|
* @msqflg contains operational flags.
|
|
* Return 0 if permission is granted.
|
|
* @msg_queue_msgrcv:
|
|
* Check permission before a message, @msg, is removed from the message
|
|
* queue. The @target task structure contains a pointer to the
|
|
* process that will be receiving the message (not equal to the current
|
|
* process when inline receives are being performed).
|
|
* @perm contains the IPC permissions of the message queue.
|
|
* @msg contains the message destination.
|
|
* @target contains the task structure for recipient process.
|
|
* @type contains the type of message requested.
|
|
* @mode contains the operational flags.
|
|
* Return 0 if permission is granted.
|
|
*
|
|
* Security hooks for System V Shared Memory Segments
|
|
*
|
|
* @shm_alloc_security:
|
|
* Allocate and attach a security structure to the @perm->security
|
|
* field. The security field is initialized to NULL when the structure is
|
|
* first created.
|
|
* @perm contains the IPC permissions of the shared memory structure.
|
|
* Return 0 if operation was successful and permission is granted.
|
|
* @shm_free_security:
|
|
* Deallocate the security structure @perm->security for the memory segment.
|
|
* @perm contains the IPC permissions of the shared memory structure.
|
|
* @shm_associate:
|
|
* Check permission when a shared memory region is requested through the
|
|
* shmget system call. This hook is only called when returning the shared
|
|
* memory region identifier for an existing region, not when a new shared
|
|
* memory region is created.
|
|
* @perm contains the IPC permissions of the shared memory structure.
|
|
* @shmflg contains the operation control flags.
|
|
* Return 0 if permission is granted.
|
|
* @shm_shmctl:
|
|
* Check permission when a shared memory control operation specified by
|
|
* @cmd is to be performed on the shared memory region with permissions @perm.
|
|
* The @perm may be NULL, e.g. for IPC_INFO or SHM_INFO.
|
|
* @perm contains the IPC permissions of the shared memory structure.
|
|
* @cmd contains the operation to be performed.
|
|
* Return 0 if permission is granted.
|
|
* @shm_shmat:
|
|
* Check permissions prior to allowing the shmat system call to attach the
|
|
* shared memory segment with permissions @perm to the data segment of the
|
|
* calling process. The attaching address is specified by @shmaddr.
|
|
* @perm contains the IPC permissions of the shared memory structure.
|
|
* @shmaddr contains the address to attach memory region to.
|
|
* @shmflg contains the operational flags.
|
|
* Return 0 if permission is granted.
|
|
*
|
|
* Security hooks for System V Semaphores
|
|
*
|
|
* @sem_alloc_security:
|
|
* Allocate and attach a security structure to the @perm->security
|
|
* field. The security field is initialized to NULL when the structure is
|
|
* first created.
|
|
* @perm contains the IPC permissions of the semaphore.
|
|
* Return 0 if operation was successful and permission is granted.
|
|
* @sem_free_security:
|
|
* Deallocate security structure @perm->security for the semaphore.
|
|
* @perm contains the IPC permissions of the semaphore.
|
|
* @sem_associate:
|
|
* Check permission when a semaphore is requested through the semget
|
|
* system call. This hook is only called when returning the semaphore
|
|
* identifier for an existing semaphore, not when a new one must be
|
|
* created.
|
|
* @perm contains the IPC permissions of the semaphore.
|
|
* @semflg contains the operation control flags.
|
|
* Return 0 if permission is granted.
|
|
* @sem_semctl:
|
|
* Check permission when a semaphore operation specified by @cmd is to be
|
|
* performed on the semaphore. The @perm may be NULL, e.g. for
|
|
* IPC_INFO or SEM_INFO.
|
|
* @perm contains the IPC permissions of the semaphore. May be NULL.
|
|
* @cmd contains the operation to be performed.
|
|
* Return 0 if permission is granted.
|
|
* @sem_semop:
|
|
* Check permissions before performing operations on members of the
|
|
* semaphore set. If the @alter flag is nonzero, the semaphore set
|
|
* may be modified.
|
|
* @perm contains the IPC permissions of the semaphore.
|
|
* @sops contains the operations to perform.
|
|
* @nsops contains the number of operations to perform.
|
|
* @alter contains the flag indicating whether changes are to be made.
|
|
* Return 0 if permission is granted.
|
|
*
|
|
* @binder_set_context_mgr:
|
|
* Check whether @mgr is allowed to be the binder context manager.
|
|
* @mgr contains the struct cred for the current binder process.
|
|
* Return 0 if permission is granted.
|
|
* @binder_transaction:
|
|
* Check whether @from is allowed to invoke a binder transaction call
|
|
* to @to.
|
|
* @from contains the struct cred for the sending process.
|
|
* @to contains the struct cred for the receiving process.
|
|
* @binder_transfer_binder:
|
|
* Check whether @from is allowed to transfer a binder reference to @to.
|
|
* @from contains the struct cred for the sending process.
|
|
* @to contains the struct cred for the receiving process.
|
|
* @binder_transfer_file:
|
|
* Check whether @from is allowed to transfer @file to @to.
|
|
* @from contains the struct cred for the sending process.
|
|
* @file contains the struct file being transferred.
|
|
* @to contains the struct cred for the receiving process.
|
|
*
|
|
* @ptrace_access_check:
|
|
* Check permission before allowing the current process to trace the
|
|
* @child process.
|
|
* Security modules may also want to perform a process tracing check
|
|
* during an execve in the set_security or apply_creds hooks of
|
|
* tracing check during an execve in the bprm_set_creds hook of
|
|
* binprm_security_ops if the process is being traced and its security
|
|
* attributes would be changed by the execve.
|
|
* @child contains the task_struct structure for the target process.
|
|
* @mode contains the PTRACE_MODE flags indicating the form of access.
|
|
* Return 0 if permission is granted.
|
|
* @ptrace_traceme:
|
|
* Check that the @parent process has sufficient permission to trace the
|
|
* current process before allowing the current process to present itself
|
|
* to the @parent process for tracing.
|
|
* @parent contains the task_struct structure for debugger process.
|
|
* Return 0 if permission is granted.
|
|
* @capget:
|
|
* Get the @effective, @inheritable, and @permitted capability sets for
|
|
* the @target process. The hook may also perform permission checking to
|
|
* determine if the current process is allowed to see the capability sets
|
|
* of the @target process.
|
|
* @target contains the task_struct structure for target process.
|
|
* @effective contains the effective capability set.
|
|
* @inheritable contains the inheritable capability set.
|
|
* @permitted contains the permitted capability set.
|
|
* Return 0 if the capability sets were successfully obtained.
|
|
* @capset:
|
|
* Set the @effective, @inheritable, and @permitted capability sets for
|
|
* the current process.
|
|
* @new contains the new credentials structure for target process.
|
|
* @old contains the current credentials structure for target process.
|
|
* @effective contains the effective capability set.
|
|
* @inheritable contains the inheritable capability set.
|
|
* @permitted contains the permitted capability set.
|
|
* Return 0 and update @new if permission is granted.
|
|
* @capable:
|
|
* Check whether the @tsk process has the @cap capability in the indicated
|
|
* credentials.
|
|
* @cred contains the credentials to use.
|
|
* @ns contains the user namespace we want the capability in
|
|
* @cap contains the capability <include/linux/capability.h>.
|
|
* @opts contains options for the capable check <include/linux/security.h>
|
|
* Return 0 if the capability is granted for @tsk.
|
|
* @quotactl:
|
|
* Check whether the quotactl syscall is allowed for this @sb.
|
|
* @quota_on:
|
|
* Check whether QUOTAON is allowed for this @dentry.
|
|
* @syslog:
|
|
* Check permission before accessing the kernel message ring or changing
|
|
* logging to the console.
|
|
* See the syslog(2) manual page for an explanation of the @type values.
|
|
* @type contains the SYSLOG_ACTION_* constant from <include/linux/syslog.h>
|
|
* Return 0 if permission is granted.
|
|
* @settime:
|
|
* Check permission to change the system time.
|
|
* struct timespec64 is defined in <include/linux/time64.h> and timezone
|
|
* is defined in <include/linux/time.h>
|
|
* @ts contains new time
|
|
* @tz contains new timezone
|
|
* Return 0 if permission is granted.
|
|
* @vm_enough_memory:
|
|
* Check permissions for allocating a new virtual mapping.
|
|
* @mm contains the mm struct it is being added to.
|
|
* @pages contains the number of pages.
|
|
* Return 0 if permission is granted.
|
|
*
|
|
* @ismaclabel:
|
|
* Check if the extended attribute specified by @name
|
|
* represents a MAC label. Returns 1 if name is a MAC
|
|
* attribute otherwise returns 0.
|
|
* @name full extended attribute name to check against
|
|
* LSM as a MAC label.
|
|
*
|
|
* @secid_to_secctx:
|
|
* Convert secid to security context. If secdata is NULL the length of
|
|
* the result will be returned in seclen, but no secdata will be returned.
|
|
* This does mean that the length could change between calls to check the
|
|
* length and the next call which actually allocates and returns the
|
|
* secdata.
|
|
* @secid contains the security ID.
|
|
* @secdata contains the pointer that stores the converted security
|
|
* context.
|
|
* @seclen pointer which contains the length of the data
|
|
* @secctx_to_secid:
|
|
* Convert security context to secid.
|
|
* @secid contains the pointer to the generated security ID.
|
|
* @secdata contains the security context.
|
|
*
|
|
* @release_secctx:
|
|
* Release the security context.
|
|
* @secdata contains the security context.
|
|
* @seclen contains the length of the security context.
|
|
*
|
|
* Security hooks for Audit
|
|
*
|
|
* @audit_rule_init:
|
|
* Allocate and initialize an LSM audit rule structure.
|
|
* @field contains the required Audit action.
|
|
* Fields flags are defined in <include/linux/audit.h>
|
|
* @op contains the operator the rule uses.
|
|
* @rulestr contains the context where the rule will be applied to.
|
|
* @lsmrule contains a pointer to receive the result.
|
|
* Return 0 if @lsmrule has been successfully set,
|
|
* -EINVAL in case of an invalid rule.
|
|
*
|
|
* @audit_rule_known:
|
|
* Specifies whether given @krule contains any fields related to
|
|
* current LSM.
|
|
* @krule contains the audit rule of interest.
|
|
* Return 1 in case of relation found, 0 otherwise.
|
|
*
|
|
* @audit_rule_match:
|
|
* Determine if given @secid matches a rule previously approved
|
|
* by @audit_rule_known.
|
|
* @secid contains the security id in question.
|
|
* @field contains the field which relates to current LSM.
|
|
* @op contains the operator that will be used for matching.
|
|
* @lrule points to the audit rule that will be checked against.
|
|
* Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure.
|
|
*
|
|
* @audit_rule_free:
|
|
* Deallocate the LSM audit rule structure previously allocated by
|
|
* audit_rule_init.
|
|
* @lsmrule contains the allocated rule
|
|
*
|
|
* @inode_invalidate_secctx:
|
|
* Notify the security module that it must revalidate the security context
|
|
* of an inode.
|
|
*
|
|
* @inode_notifysecctx:
|
|
* Notify the security module of what the security context of an inode
|
|
* should be. Initializes the incore security context managed by the
|
|
* security module for this inode. Example usage: NFS client invokes
|
|
* this hook to initialize the security context in its incore inode to the
|
|
* value provided by the server for the file when the server returned the
|
|
* file's attributes to the client.
|
|
* Must be called with inode->i_mutex locked.
|
|
* @inode we wish to set the security context of.
|
|
* @ctx contains the string which we wish to set in the inode.
|
|
* @ctxlen contains the length of @ctx.
|
|
*
|
|
* @inode_setsecctx:
|
|
* Change the security context of an inode. Updates the
|
|
* incore security context managed by the security module and invokes the
|
|
* fs code as needed (via __vfs_setxattr_noperm) to update any backing
|
|
* xattrs that represent the context. Example usage: NFS server invokes
|
|
* this hook to change the security context in its incore inode and on the
|
|
* backing filesystem to a value provided by the client on a SETATTR
|
|
* operation.
|
|
* Must be called with inode->i_mutex locked.
|
|
* @dentry contains the inode we wish to set the security context of.
|
|
* @ctx contains the string which we wish to set in the inode.
|
|
* @ctxlen contains the length of @ctx.
|
|
*
|
|
* @inode_getsecctx:
|
|
* On success, returns 0 and fills out @ctx and @ctxlen with the security
|
|
* context for the given @inode.
|
|
* @inode we wish to get the security context of.
|
|
* @ctx is a pointer in which to place the allocated security context.
|
|
* @ctxlen points to the place to put the length of @ctx.
|
|
*
|
|
* Security hooks for the general notification queue:
|
|
*
|
|
* @post_notification:
|
|
* Check to see if a watch notification can be posted to a particular
|
|
* queue.
|
|
* @w_cred: The credentials of the whoever set the watch.
|
|
* @cred: The event-triggerer's credentials
|
|
* @n: The notification being posted
|
|
*
|
|
* @watch_key:
|
|
* Check to see if a process is allowed to watch for event notifications
|
|
* from a key or keyring.
|
|
* @key: The key to watch.
|
|
*
|
|
* Security hooks for using the eBPF maps and programs functionalities through
|
|
* eBPF syscalls.
|
|
*
|
|
* @bpf:
|
|
* Do a initial check for all bpf syscalls after the attribute is copied
|
|
* into the kernel. The actual security module can implement their own
|
|
* rules to check the specific cmd they need.
|
|
*
|
|
* @bpf_map:
|
|
* Do a check when the kernel generate and return a file descriptor for
|
|
* eBPF maps.
|
|
*
|
|
* @map: bpf map that we want to access
|
|
* @mask: the access flags
|
|
*
|
|
* @bpf_prog:
|
|
* Do a check when the kernel generate and return a file descriptor for
|
|
* eBPF programs.
|
|
*
|
|
* @prog: bpf prog that userspace want to use.
|
|
*
|
|
* @bpf_map_alloc_security:
|
|
* Initialize the security field inside bpf map.
|
|
*
|
|
* @bpf_map_free_security:
|
|
* Clean up the security information stored inside bpf map.
|
|
*
|
|
* @bpf_prog_alloc_security:
|
|
* Initialize the security field inside bpf program.
|
|
*
|
|
* @bpf_prog_free_security:
|
|
* Clean up the security information stored inside bpf prog.
|
|
*
|
|
* @locked_down:
|
|
* Determine whether a kernel feature that potentially enables arbitrary
|
|
* code execution in kernel space should be permitted.
|
|
*
|
|
* @what: kernel feature being accessed
|
|
*
|
|
* Security hooks for perf events
|
|
*
|
|
* @perf_event_open:
|
|
* Check whether the @type of perf_event_open syscall is allowed.
|
|
* @perf_event_alloc:
|
|
* Allocate and save perf_event security info.
|
|
* @perf_event_free:
|
|
* Release (free) perf_event security info.
|
|
* @perf_event_read:
|
|
* Read perf_event security info if allowed.
|
|
* @perf_event_write:
|
|
* Write perf_event security info if allowed.
|
|
*
|
|
* Security hooks for io_uring
|
|
*
|
|
* @uring_override_creds:
|
|
* Check if the current task, executing an io_uring operation, is allowed
|
|
* to override it's credentials with @new.
|
|
*
|
|
* @new: the new creds to use
|
|
*
|
|
* @uring_sqpoll:
|
|
* Check whether the current task is allowed to spawn a io_uring polling
|
|
* thread (IORING_SETUP_SQPOLL).
|
|
*
|
|
*/
|
|
union security_list_options {
|
|
#define LSM_HOOK(RET, DEFAULT, NAME, ...) RET (*NAME)(__VA_ARGS__);
|
|
#include "lsm_hook_defs.h"
|
|
#undef LSM_HOOK
|
|
};
|
|
|
|
struct security_hook_heads {
|
|
#define LSM_HOOK(RET, DEFAULT, NAME, ...) struct hlist_head NAME;
|
|
#include "lsm_hook_defs.h"
|
|
#undef LSM_HOOK
|
|
} __randomize_layout;
|
|
|
|
/*
|
|
* Security module hook list structure.
|
|
* For use with generic list macros for common operations.
|
|
*/
|
|
struct security_hook_list {
|
|
struct hlist_node list;
|
|
struct hlist_head *head;
|
|
union security_list_options hook;
|
|
char *lsm;
|
|
} __randomize_layout;
|
|
|
|
/*
|
|
* Security blob size or offset data.
|
|
*/
|
|
struct lsm_blob_sizes {
|
|
int lbs_cred;
|
|
int lbs_file;
|
|
int lbs_inode;
|
|
int lbs_superblock;
|
|
int lbs_ipc;
|
|
int lbs_msg_msg;
|
|
int lbs_task;
|
|
};
|
|
|
|
/*
|
|
* LSM_RET_VOID is used as the default value in LSM_HOOK definitions for void
|
|
* LSM hooks (in include/linux/lsm_hook_defs.h).
|
|
*/
|
|
#define LSM_RET_VOID ((void) 0)
|
|
|
|
/*
|
|
* Initializing a security_hook_list structure takes
|
|
* up a lot of space in a source file. This macro takes
|
|
* care of the common case and reduces the amount of
|
|
* text involved.
|
|
*/
|
|
#define LSM_HOOK_INIT(HEAD, HOOK) \
|
|
{ .head = &security_hook_heads.HEAD, .hook = { .HEAD = HOOK } }
|
|
|
|
extern struct security_hook_heads security_hook_heads;
|
|
extern char *lsm_names;
|
|
|
|
extern void security_add_hooks(struct security_hook_list *hooks, int count,
|
|
char *lsm);
|
|
|
|
#define LSM_FLAG_LEGACY_MAJOR BIT(0)
|
|
#define LSM_FLAG_EXCLUSIVE BIT(1)
|
|
|
|
enum lsm_order {
|
|
LSM_ORDER_FIRST = -1, /* This is only for capabilities. */
|
|
LSM_ORDER_MUTABLE = 0,
|
|
};
|
|
|
|
struct lsm_info {
|
|
const char *name; /* Required. */
|
|
enum lsm_order order; /* Optional: default is LSM_ORDER_MUTABLE */
|
|
unsigned long flags; /* Optional: flags describing LSM */
|
|
int *enabled; /* Optional: controlled by CONFIG_LSM */
|
|
int (*init)(void); /* Required. */
|
|
struct lsm_blob_sizes *blobs; /* Optional: for blob sharing. */
|
|
};
|
|
|
|
extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
|
|
extern struct lsm_info __start_early_lsm_info[], __end_early_lsm_info[];
|
|
|
|
#define DEFINE_LSM(lsm) \
|
|
static struct lsm_info __lsm_##lsm \
|
|
__used __section(".lsm_info.init") \
|
|
__aligned(sizeof(unsigned long))
|
|
|
|
#define DEFINE_EARLY_LSM(lsm) \
|
|
static struct lsm_info __early_lsm_##lsm \
|
|
__used __section(".early_lsm_info.init") \
|
|
__aligned(sizeof(unsigned long))
|
|
|
|
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
|
|
/*
|
|
* Assuring the safety of deleting a security module is up to
|
|
* the security module involved. This may entail ordering the
|
|
* module's hook list in a particular way, refusing to disable
|
|
* the module once a policy is loaded or any number of other
|
|
* actions better imagined than described.
|
|
*
|
|
* The name of the configuration option reflects the only module
|
|
* that currently uses the mechanism. Any developer who thinks
|
|
* disabling their module is a good idea needs to be at least as
|
|
* careful as the SELinux team.
|
|
*/
|
|
static inline void security_delete_hooks(struct security_hook_list *hooks,
|
|
int count)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
hlist_del_rcu(&hooks[i].list);
|
|
}
|
|
#endif /* CONFIG_SECURITY_SELINUX_DISABLE */
|
|
|
|
/* Currently required to handle SELinux runtime hook disable. */
|
|
#ifdef CONFIG_SECURITY_WRITABLE_HOOKS
|
|
#define __lsm_ro_after_init
|
|
#else
|
|
#define __lsm_ro_after_init __ro_after_init
|
|
#endif /* CONFIG_SECURITY_WRITABLE_HOOKS */
|
|
|
|
extern int lsm_inode_alloc(struct inode *inode);
|
|
|
|
#endif /* ! __LINUX_LSM_HOOKS_H */
|