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landlock: Fix landlock_add_rule(2) documentation 

It is not mandatory to pass a file descriptor obtained with the O_PATH
flag.  Also, replace rule's accesses with ruleset's accesses.

Link: https://lore.kernel.org/r/20220506160820.524344-2-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün 2022-05-06 18:08:11 +02:00
parent 81709f3dcc
commit a13e248ff9
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2 changed files with 6 additions and 6 deletions
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5
include/uapi/linux/landlock.h
View File

@ -62,8 +62,9 @@ struct landlock_path_beneath_attr {
*/
__u64 allowed_access;
/**
* @parent_fd: File descriptor, open with ``O_PATH``, which identifies
* the parent directory of a file hierarchy, or just a file.
* @parent_fd: File descriptor, preferably opened with ``O_PATH``,
* which identifies the parent directory of a file hierarchy, or just a
* file.
*/
__s32 parent_fd;
/*

7
security/landlock/syscalls.c
View File

@ -292,14 +292,13 @@ out_fdput:
*
* - EOPNOTSUPP: Landlock is supported by the kernel but disabled at boot time;
* - EINVAL: @flags is not 0, or inconsistent access in the rule (i.e.
* &landlock_path_beneath_attr.allowed_access is not a subset of the rule's
* accesses);
* &landlock_path_beneath_attr.allowed_access is not a subset of the
* ruleset handled accesses);
* - ENOMSG: Empty accesses (e.g. &landlock_path_beneath_attr.allowed_access);
* - EBADF: @ruleset_fd is not a file descriptor for the current thread, or a
* member of @rule_attr is not a file descriptor as expected;
* - EBADFD: @ruleset_fd is not a ruleset file descriptor, or a member of
* @rule_attr is not the expected file descriptor type (e.g. file open
* without O_PATH);
* @rule_attr is not the expected file descriptor type;
* - EPERM: @ruleset_fd has no write access to the underlying ruleset;
* - EFAULT: @rule_attr inconsistency.
*/