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Merge branch 'master' of git://git.infradead.org/users/eparis/selinux into for-linus 

Conflicts:
	lib/flex_array.c
	security/selinux/avc.c
	security/selinux/hooks.c
	security/selinux/ss/policydb.c
	security/smack/smack_lsm.c

Manually resolve conflicts.

Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
James Morris 2011-05-24 23:20:19 +10:00
parent 434d42cfd0 7a627e3b9a
commit b7b57551bb
14 changed files with 399 additions and 221 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
MAINTAINERS
View File

@ -5592,10 +5592,11 @@ M: James Morris <jmorris@namei.org>
M: Eric Paris <eparis@parisplace.org> M: Eric Paris <eparis@parisplace.org>
L: selinux@tycho.nsa.gov (subscribers-only, general discussion) L: selinux@tycho.nsa.gov (subscribers-only, general discussion)
W: http://selinuxproject.org W: http://selinuxproject.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6.git T: git git://git.infradead.org/users/eparis/selinux.git
S: Supported S: Supported
F: include/linux/selinux* F: include/linux/selinux*
F: security/selinux/ F: security/selinux/
F: scripts/selinux/
APPARMOR SECURITY MODULE APPARMOR SECURITY MODULE
M: John Johansen <john.johansen@canonical.com> M: John Johansen <john.johansen@canonical.com>

7
include/linux/lsm_audit.h
View File

@ -27,7 +27,7 @@
/* Auxiliary data to use in generating the audit record. */ /* Auxiliary data to use in generating the audit record. */
struct common_audit_data { struct common_audit_data {
char type; char type;
#define LSM_AUDIT_DATA_FS 1 #define LSM_AUDIT_DATA_PATH 1
#define LSM_AUDIT_DATA_NET 2 #define LSM_AUDIT_DATA_NET 2
#define LSM_AUDIT_DATA_CAP 3 #define LSM_AUDIT_DATA_CAP 3
#define LSM_AUDIT_DATA_IPC 4 #define LSM_AUDIT_DATA_IPC 4
@ -35,12 +35,13 @@ struct common_audit_data {
#define LSM_AUDIT_DATA_KEY 6 #define LSM_AUDIT_DATA_KEY 6
#define LSM_AUDIT_DATA_NONE 7 #define LSM_AUDIT_DATA_NONE 7
#define LSM_AUDIT_DATA_KMOD 8 #define LSM_AUDIT_DATA_KMOD 8
#define LSM_AUDIT_DATA_INODE 9
#define LSM_AUDIT_DATA_DENTRY 10
struct task_struct *tsk; struct task_struct *tsk;
union { union {
struct {
struct path path; struct path path;
struct dentry *dentry;
struct inode *inode; struct inode *inode;
} fs;
struct { struct {
int netif; int netif;
struct sock *sk; struct sock *sk;

24
lib/flex_array.c
View File

@ -88,7 +88,10 @@ struct flex_array *flex_array_alloc(int element_size, unsigned int total,
gfp_t flags) gfp_t flags)
{ {
struct flex_array *ret; struct flex_array *ret;
int max_size = FLEX_ARRAY_NR_BASE_PTRS * int max_size = 0;
if (element_size)
max_size = FLEX_ARRAY_NR_BASE_PTRS *
FLEX_ARRAY_ELEMENTS_PER_PART(element_size); FLEX_ARRAY_ELEMENTS_PER_PART(element_size);
/* max_size will end up 0 if element_size > PAGE_SIZE */ /* max_size will end up 0 if element_size > PAGE_SIZE */
@ -183,15 +186,18 @@ __fa_get_part(struct flex_array *fa, int part_nr, gfp_t flags)
int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src, int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src,
gfp_t flags) gfp_t flags)
{ {
int part_nr = fa_element_to_part_nr(fa, element_nr); int part_nr;
struct flex_array_part *part; struct flex_array_part *part;
void *dst; void *dst;
if (element_nr >= fa->total_nr_elements) if (element_nr >= fa->total_nr_elements)
return -ENOSPC; return -ENOSPC;
if (!fa->element_size)
return 0;
if (elements_fit_in_base(fa)) if (elements_fit_in_base(fa))
part = (struct flex_array_part *)&fa->parts[0]; part = (struct flex_array_part *)&fa->parts[0];
else { else {
part_nr = fa_element_to_part_nr(fa, element_nr);
part = __fa_get_part(fa, part_nr, flags); part = __fa_get_part(fa, part_nr, flags);
if (!part) if (!part)
return -ENOMEM; return -ENOMEM;
@ -211,15 +217,18 @@ EXPORT_SYMBOL(flex_array_put);
*/ */
int flex_array_clear(struct flex_array *fa, unsigned int element_nr) int flex_array_clear(struct flex_array *fa, unsigned int element_nr)
{ {
int part_nr = fa_element_to_part_nr(fa, element_nr); int part_nr;
struct flex_array_part *part; struct flex_array_part *part;
void *dst; void *dst;
if (element_nr >= fa->total_nr_elements) if (element_nr >= fa->total_nr_elements)
return -ENOSPC; return -ENOSPC;
if (!fa->element_size)
return 0;
if (elements_fit_in_base(fa)) if (elements_fit_in_base(fa))
part = (struct flex_array_part *)&fa->parts[0]; part = (struct flex_array_part *)&fa->parts[0];
else { else {
part_nr = fa_element_to_part_nr(fa, element_nr);
part = fa->parts[part_nr]; part = fa->parts[part_nr];
if (!part) if (!part)
return -EINVAL; return -EINVAL;
@ -264,6 +273,8 @@ int flex_array_prealloc(struct flex_array *fa, unsigned int start,
if (end >= fa->total_nr_elements) if (end >= fa->total_nr_elements)
return -ENOSPC; return -ENOSPC;
if (!fa->element_size)
return 0;
if (elements_fit_in_base(fa)) if (elements_fit_in_base(fa))
return 0; return 0;
start_part = fa_element_to_part_nr(fa, start); start_part = fa_element_to_part_nr(fa, start);
@ -291,14 +302,17 @@ EXPORT_SYMBOL(flex_array_prealloc);
*/ */
void *flex_array_get(struct flex_array *fa, unsigned int element_nr) void *flex_array_get(struct flex_array *fa, unsigned int element_nr)
{ {
int part_nr = fa_element_to_part_nr(fa, element_nr); int part_nr;
struct flex_array_part *part; struct flex_array_part *part;
if (!fa->element_size)
return NULL;
if (element_nr >= fa->total_nr_elements) if (element_nr >= fa->total_nr_elements)
return NULL; return NULL;
if (elements_fit_in_base(fa)) if (elements_fit_in_base(fa))
part = (struct flex_array_part *)&fa->parts[0]; part = (struct flex_array_part *)&fa->parts[0];
else { else {
part_nr = fa_element_to_part_nr(fa, element_nr);
part = fa->parts[part_nr]; part = fa->parts[part_nr];
if (!part) if (!part)
return NULL; return NULL;
@ -353,7 +367,7 @@ int flex_array_shrink(struct flex_array *fa)
int part_nr; int part_nr;
int ret = 0; int ret = 0;
if (!fa->total_nr_elements) if (!fa->total_nr_elements || !fa->element_size)
return 0; return 0;
if (elements_fit_in_base(fa)) if (elements_fit_in_base(fa))
return ret; return ret;

47
security/lsm_audit.c
View File

@ -210,7 +210,6 @@ static inline void print_ipv4_addr(struct audit_buffer *ab, __be32 addr,
static void dump_common_audit_data(struct audit_buffer *ab, static void dump_common_audit_data(struct audit_buffer *ab,
struct common_audit_data *a) struct common_audit_data *a)
{ {
struct inode *inode = NULL;
struct task_struct *tsk = current; struct task_struct *tsk = current;
if (a->tsk) if (a->tsk)
@ -229,20 +228,36 @@ static void dump_common_audit_data(struct audit_buffer *ab,
case LSM_AUDIT_DATA_CAP: case LSM_AUDIT_DATA_CAP:
audit_log_format(ab, " capability=%d ", a->u.cap); audit_log_format(ab, " capability=%d ", a->u.cap);
break; break;
case LSM_AUDIT_DATA_FS: case LSM_AUDIT_DATA_PATH: {
if (a->u.fs.path.dentry) { struct inode *inode;
struct dentry *dentry = a->u.fs.path.dentry;
if (a->u.fs.path.mnt) { audit_log_d_path(ab, "path=", &a->u.path);
audit_log_d_path(ab, "path=", &a->u.fs.path);
} else { inode = a->u.path.dentry->d_inode;
audit_log_format(ab, " name="); if (inode)
audit_log_untrustedstring(ab, audit_log_format(ab, " dev=%s ino=%lu",
dentry->d_name.name); inode->i_sb->s_id,
inode->i_ino);
break;
} }
inode = dentry->d_inode; case LSM_AUDIT_DATA_DENTRY: {
} else if (a->u.fs.inode) { struct inode *inode;
audit_log_format(ab, " name=");
audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
inode = a->u.dentry->d_inode;
if (inode)
audit_log_format(ab, " dev=%s ino=%lu",
inode->i_sb->s_id,
inode->i_ino);
break;
}
case LSM_AUDIT_DATA_INODE: {
struct dentry *dentry; struct dentry *dentry;
inode = a->u.fs.inode; struct inode *inode;
inode = a->u.inode;
dentry = d_find_alias(inode); dentry = d_find_alias(inode);
if (dentry) { if (dentry) {
audit_log_format(ab, " name="); audit_log_format(ab, " name=");
@ -250,12 +265,10 @@ static void dump_common_audit_data(struct audit_buffer *ab,
dentry->d_name.name); dentry->d_name.name);
dput(dentry); dput(dentry);
} }
} audit_log_format(ab, " dev=%s ino=%lu", inode->i_sb->s_id,
if (inode)
audit_log_format(ab, " dev=%s ino=%lu",
inode->i_sb->s_id,
inode->i_ino); inode->i_ino);
break; break;
}
case LSM_AUDIT_DATA_TASK: case LSM_AUDIT_DATA_TASK:
tsk = a->u.tsk; tsk = a->u.tsk;
if (tsk && tsk->pid) { if (tsk && tsk->pid) {

2
security/selinux/avc.c
View File

@ -526,7 +526,7 @@ int avc_audit(u32 ssid, u32 tsid,
* during retry. However this is logically just as if the operation * during retry. However this is logically just as if the operation
* happened a little later. * happened a little later.
*/ */
if ((a->type == LSM_AUDIT_DATA_FS) && if ((a->type == LSM_AUDIT_DATA_INODE) &&
(flags & IPERM_FLAG_RCU)) (flags & IPERM_FLAG_RCU))
return -ECHILD; return -ECHILD;

92
security/selinux/hooks.c
View File

@ -990,6 +990,7 @@ static void selinux_write_opts(struct seq_file *m,
continue; continue;
default: default:
BUG(); BUG();
return;
}; };
/* we need a comma before each option */ /* we need a comma before each option */
seq_putc(m, ','); seq_putc(m, ',');
@ -1443,6 +1444,7 @@ static int task_has_capability(struct task_struct *tsk,
printk(KERN_ERR printk(KERN_ERR
"SELinux: out of range capability %d\n", cap); "SELinux: out of range capability %d\n", cap);
BUG(); BUG();
return -EINVAL;
} }
rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd); rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd);
@ -1487,8 +1489,8 @@ static int inode_has_perm(const struct cred *cred,
if (!adp) { if (!adp) {
adp = &ad; adp = &ad;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, INODE);
ad.u.fs.inode = inode; ad.u.inode = inode;
} }
return avc_has_perm_flags(sid, isec->sid, isec->sclass, perms, adp, flags); return avc_has_perm_flags(sid, isec->sid, isec->sclass, perms, adp, flags);
@ -1498,16 +1500,29 @@ static int inode_has_perm(const struct cred *cred,
the dentry to help the auditing code to more easily generate the the dentry to help the auditing code to more easily generate the
pathname if needed. */ pathname if needed. */
static inline int dentry_has_perm(const struct cred *cred, static inline int dentry_has_perm(const struct cred *cred,
struct vfsmount *mnt,
struct dentry *dentry, struct dentry *dentry,
u32 av) u32 av)
{ {
struct inode *inode = dentry->d_inode; struct inode *inode = dentry->d_inode;
struct common_audit_data ad; struct common_audit_data ad;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.mnt = mnt; ad.u.dentry = dentry;
ad.u.fs.path.dentry = dentry; return inode_has_perm(cred, inode, av, &ad, 0);
}
/* Same as inode_has_perm, but pass explicit audit data containing
the path to help the auditing code to more easily generate the
pathname if needed. */
static inline int path_has_perm(const struct cred *cred,
struct path *path,
u32 av)
{
struct inode *inode = path->dentry->d_inode;
struct common_audit_data ad;
COMMON_AUDIT_DATA_INIT(&ad, PATH);
ad.u.path = *path;
return inode_has_perm(cred, inode, av, &ad, 0); return inode_has_perm(cred, inode, av, &ad, 0);
} }
@ -1529,8 +1544,8 @@ static int file_has_perm(const struct cred *cred,
u32 sid = cred_sid(cred); u32 sid = cred_sid(cred);
int rc; int rc;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, PATH);
ad.u.fs.path = file->f_path; ad.u.path = file->f_path;
if (sid != fsec->sid) { if (sid != fsec->sid) {
rc = avc_has_perm(sid, fsec->sid, rc = avc_has_perm(sid, fsec->sid,
@ -1568,8 +1583,8 @@ static int may_create(struct inode *dir,
sid = tsec->sid; sid = tsec->sid;
newsid = tsec->create_sid; newsid = tsec->create_sid;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = dentry; ad.u.dentry = dentry;
rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR, rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
DIR__ADD_NAME | DIR__SEARCH, DIR__ADD_NAME | DIR__SEARCH,
@ -1621,8 +1636,8 @@ static int may_link(struct inode *dir,
dsec = dir->i_security; dsec = dir->i_security;
isec = dentry->d_inode->i_security; isec = dentry->d_inode->i_security;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = dentry; ad.u.dentry = dentry;
av = DIR__SEARCH; av = DIR__SEARCH;
av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME); av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
@ -1667,9 +1682,9 @@ static inline int may_rename(struct inode *old_dir,
old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode); old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
new_dsec = new_dir->i_security; new_dsec = new_dir->i_security;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = old_dentry; ad.u.dentry = old_dentry;
rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR, rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR,
DIR__REMOVE_NAME | DIR__SEARCH, &ad); DIR__REMOVE_NAME | DIR__SEARCH, &ad);
if (rc) if (rc)
@ -1685,7 +1700,7 @@ static inline int may_rename(struct inode *old_dir,
return rc; return rc;
} }
ad.u.fs.path.dentry = new_dentry; ad.u.dentry = new_dentry;
av = DIR__ADD_NAME | DIR__SEARCH; av = DIR__ADD_NAME | DIR__SEARCH;
if (new_dentry->d_inode) if (new_dentry->d_inode)
av |= DIR__REMOVE_NAME; av |= DIR__REMOVE_NAME;
@ -1895,7 +1910,7 @@ static int selinux_quota_on(struct dentry *dentry)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON); return dentry_has_perm(cred, dentry, FILE__QUOTAON);
} }
static int selinux_syslog(int type) static int selinux_syslog(int type)
@ -1992,8 +2007,8 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
return rc; return rc;
} }
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, PATH);
ad.u.fs.path = bprm->file->f_path; ad.u.path = bprm->file->f_path;
if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID) if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
new_tsec->sid = old_tsec->sid; new_tsec->sid = old_tsec->sid;
@ -2121,7 +2136,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
/* Revalidate access to inherited open files. */ /* Revalidate access to inherited open files. */
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, INODE);
spin_lock(&files->file_lock); spin_lock(&files->file_lock);
for (;;) { for (;;) {
@ -2469,8 +2484,8 @@ static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
if (flags & MS_KERNMOUNT) if (flags & MS_KERNMOUNT)
return 0; return 0;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = sb->s_root; ad.u.dentry = sb->s_root;
return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad); return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
} }
@ -2479,8 +2494,8 @@ static int selinux_sb_statfs(struct dentry *dentry)
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
struct common_audit_data ad; struct common_audit_data ad;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = dentry->d_sb->s_root; ad.u.dentry = dentry->d_sb->s_root;
return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad); return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
} }
@ -2496,8 +2511,7 @@ static int selinux_mount(char *dev_name,
return superblock_has_perm(cred, path->mnt->mnt_sb, return superblock_has_perm(cred, path->mnt->mnt_sb,
FILESYSTEM__REMOUNT, NULL); FILESYSTEM__REMOUNT, NULL);
else else
return dentry_has_perm(cred, path->mnt, path->dentry, return path_has_perm(cred, path, FILE__MOUNTON);
FILE__MOUNTON);
} }
static int selinux_umount(struct vfsmount *mnt, int flags) static int selinux_umount(struct vfsmount *mnt, int flags)
@ -2630,14 +2644,14 @@ static int selinux_inode_readlink(struct dentry *dentry)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
return dentry_has_perm(cred, NULL, dentry, FILE__READ); return dentry_has_perm(cred, dentry, FILE__READ);
} }
static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata) static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
return dentry_has_perm(cred, NULL, dentry, FILE__READ); return dentry_has_perm(cred, dentry, FILE__READ);
} }
static int selinux_inode_permission(struct inode *inode, int mask, unsigned flags) static int selinux_inode_permission(struct inode *inode, int mask, unsigned flags)
@ -2654,8 +2668,8 @@ static int selinux_inode_permission(struct inode *inode, int mask, unsigned flag
if (!mask) if (!mask)
return 0; return 0;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, INODE);
ad.u.fs.inode = inode; ad.u.inode = inode;
if (from_access) if (from_access)
ad.selinux_audit_data.auditdeny |= FILE__AUDIT_ACCESS; ad.selinux_audit_data.auditdeny |= FILE__AUDIT_ACCESS;
@ -2680,16 +2694,20 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET)) ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET))
return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR); return dentry_has_perm(cred, dentry, FILE__SETATTR);
return dentry_has_perm(cred, NULL, dentry, FILE__WRITE); return dentry_has_perm(cred, dentry, FILE__WRITE);
} }
static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
struct path path;
return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR); path.dentry = dentry;
path.mnt = mnt;
return path_has_perm(cred, &path, FILE__GETATTR);
} }
static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name) static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
@ -2710,7 +2728,7 @@ static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
/* Not an attribute we recognize, so just check the /* Not an attribute we recognize, so just check the
ordinary setattr permission. */ ordinary setattr permission. */
return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR); return dentry_has_perm(cred, dentry, FILE__SETATTR);
} }
static int selinux_inode_setxattr(struct dentry *dentry, const char *name, static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
@ -2733,8 +2751,8 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
if (!inode_owner_or_capable(inode)) if (!inode_owner_or_capable(inode))
return -EPERM; return -EPERM;
COMMON_AUDIT_DATA_INIT(&ad, FS); COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
ad.u.fs.path.dentry = dentry; ad.u.dentry = dentry;
rc = avc_has_perm(sid, isec->sid, isec->sclass, rc = avc_has_perm(sid, isec->sid, isec->sclass,
FILE__RELABELFROM, &ad); FILE__RELABELFROM, &ad);
@ -2797,14 +2815,14 @@ static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR); return dentry_has_perm(cred, dentry, FILE__GETATTR);
} }
static int selinux_inode_listxattr(struct dentry *dentry) static int selinux_inode_listxattr(struct dentry *dentry)
{ {
const struct cred *cred = current_cred(); const struct cred *cred = current_cred();
return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR); return dentry_has_perm(cred, dentry, FILE__GETATTR);
} }
static int selinux_inode_removexattr(struct dentry *dentry, const char *name) static int selinux_inode_removexattr(struct dentry *dentry, const char *name)

9
security/selinux/include/security.h
View File

@ -30,13 +30,14 @@
#define POLICYDB_VERSION_PERMISSIVE 23 #define POLICYDB_VERSION_PERMISSIVE 23
#define POLICYDB_VERSION_BOUNDARY 24 #define POLICYDB_VERSION_BOUNDARY 24
#define POLICYDB_VERSION_FILENAME_TRANS 25 #define POLICYDB_VERSION_FILENAME_TRANS 25
#define POLICYDB_VERSION_ROLETRANS 26
/* Range of policy versions we understand*/ /* Range of policy versions we understand*/
#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
#else #else
#define POLICYDB_VERSION_MAX POLICYDB_VERSION_FILENAME_TRANS #define POLICYDB_VERSION_MAX POLICYDB_VERSION_ROLETRANS
#endif #endif
/* Mask for just the mount related flags */ /* Mask for just the mount related flags */
@ -85,7 +86,7 @@ extern int selinux_policycap_openperm;
int security_mls_enabled(void); int security_mls_enabled(void);
int security_load_policy(void *data, size_t len); int security_load_policy(void *data, size_t len);
int security_read_policy(void **data, ssize_t *len); int security_read_policy(void **data, size_t *len);
size_t security_policydb_len(void); size_t security_policydb_len(void);
int security_policycap_supported(unsigned int req_cap); int security_policycap_supported(unsigned int req_cap);
@ -111,8 +112,8 @@ void security_compute_av_user(u32 ssid, u32 tsid,
int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
const struct qstr *qstr, u32 *out_sid); const struct qstr *qstr, u32 *out_sid);
int security_transition_sid_user(u32 ssid, u32 tsid, int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
u16 tclass, u32 *out_sid); const char *objname, u32 *out_sid);
int security_member_sid(u32 ssid, u32 tsid, int security_member_sid(u32 ssid, u32 tsid,
u16 tclass, u32 *out_sid); u16 tclass, u32 *out_sid);

1
security/selinux/netnode.c
View File

@ -141,6 +141,7 @@ static struct sel_netnode *sel_netnode_find(const void *addr, u16 family)
break; break;
default: default:
BUG(); BUG();
return NULL;
} }
list_for_each_entry_rcu(node, &sel_netnode_hash[idx].list, list) list_for_each_entry_rcu(node, &sel_netnode_hash[idx].list, list)

30
security/selinux/selinuxfs.c
View File

@ -28,6 +28,7 @@
#include <linux/percpu.h> #include <linux/percpu.h>
#include <linux/audit.h> #include <linux/audit.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/kobject.h>
/* selinuxfs pseudo filesystem for exporting the security policy API. /* selinuxfs pseudo filesystem for exporting the security policy API.
Based on the proc code and the fs/nfsd/nfsctl.c code. */ Based on the proc code and the fs/nfsd/nfsctl.c code. */
@ -753,11 +754,13 @@ out:
static ssize_t sel_write_create(struct file *file, char *buf, size_t size) static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{ {
char *scon = NULL, *tcon = NULL; char *scon = NULL, *tcon = NULL;
char *namebuf = NULL, *objname = NULL;
u32 ssid, tsid, newsid; u32 ssid, tsid, newsid;
u16 tclass; u16 tclass;
ssize_t length; ssize_t length;
char *newcon = NULL; char *newcon = NULL;
u32 len; u32 len;
int nargs;
length = task_has_security(current, SECURITY__COMPUTE_CREATE); length = task_has_security(current, SECURITY__COMPUTE_CREATE);
if (length) if (length)
@ -773,10 +776,18 @@ static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
if (!tcon) if (!tcon)
goto out; goto out;
length = -EINVAL; length = -ENOMEM;
if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) namebuf = kzalloc(size + 1, GFP_KERNEL);
if (!namebuf)
goto out; goto out;
length = -EINVAL;
nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf);
if (nargs < 3 || nargs > 4)
goto out;
if (nargs == 4)
objname = namebuf;
length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
if (length) if (length)
goto out; goto out;
@ -785,7 +796,8 @@ static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
if (length) if (length)
goto out; goto out;
length = security_transition_sid_user(ssid, tsid, tclass, &newsid); length = security_transition_sid_user(ssid, tsid, tclass,
objname, &newsid);
if (length) if (length)
goto out; goto out;
@ -804,6 +816,7 @@ static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
length = len; length = len;
out: out:
kfree(newcon); kfree(newcon);
kfree(namebuf);
kfree(tcon); kfree(tcon);
kfree(scon); kfree(scon);
return length; return length;
@ -1901,6 +1914,7 @@ static struct file_system_type sel_fs_type = {
}; };
struct vfsmount *selinuxfs_mount; struct vfsmount *selinuxfs_mount;
static struct kobject *selinuxfs_kobj;
static int __init init_sel_fs(void) static int __init init_sel_fs(void)
{ {
@ -1908,9 +1922,16 @@ static int __init init_sel_fs(void)
if (!selinux_enabled) if (!selinux_enabled)
return 0; return 0;
selinuxfs_kobj = kobject_create_and_add("selinux", fs_kobj);
if (!selinuxfs_kobj)
return -ENOMEM;
err = register_filesystem(&sel_fs_type); err = register_filesystem(&sel_fs_type);
if (err) if (err) {
kobject_put(selinuxfs_kobj);
return err; return err;
}
selinuxfs_mount = kern_mount(&sel_fs_type); selinuxfs_mount = kern_mount(&sel_fs_type);
if (IS_ERR(selinuxfs_mount)) { if (IS_ERR(selinuxfs_mount)) {
@ -1927,6 +1948,7 @@ __initcall(init_sel_fs);
#ifdef CONFIG_SECURITY_SELINUX_DISABLE #ifdef CONFIG_SECURITY_SELINUX_DISABLE
void exit_sel_fs(void) void exit_sel_fs(void)
{ {
kobject_put(selinuxfs_kobj);
unregister_filesystem(&sel_fs_type); unregister_filesystem(&sel_fs_type);
} }
#endif #endif

216
security/selinux/ss/policydb.c
View File

@ -128,6 +128,11 @@ static struct policydb_compat_info policydb_compat[] = {
.sym_num = SYM_NUM, .sym_num = SYM_NUM,
.ocon_num = OCON_NUM, .ocon_num = OCON_NUM,
}, },
{
.version = POLICYDB_VERSION_ROLETRANS,
.sym_num = SYM_NUM,
.ocon_num = OCON_NUM,
},
}; };
static struct policydb_compat_info *policydb_lookup_compat(int version) static struct policydb_compat_info *policydb_lookup_compat(int version)
@ -179,6 +184,43 @@ out:
return rc; return rc;
} }
static u32 filenametr_hash(struct hashtab *h, const void *k)
{
const struct filename_trans *ft = k;
unsigned long hash;
unsigned int byte_num;
unsigned char focus;
hash = ft->stype ^ ft->ttype ^ ft->tclass;
byte_num = 0;
while ((focus = ft->name[byte_num++]))
hash = partial_name_hash(focus, hash);
return hash & (h->size - 1);
}
static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
{
const struct filename_trans *ft1 = k1;
const struct filename_trans *ft2 = k2;
int v;
v = ft1->stype - ft2->stype;
if (v)
return v;
v = ft1->ttype - ft2->ttype;
if (v)
return v;
v = ft1->tclass - ft2->tclass;
if (v)
return v;
return strcmp(ft1->name, ft2->name);
}
static u32 rangetr_hash(struct hashtab *h, const void *k) static u32 rangetr_hash(struct hashtab *h, const void *k)
{ {
const struct range_trans *key = k; const struct range_trans *key = k;
@ -231,15 +273,22 @@ static int policydb_init(struct policydb *p)
if (rc) if (rc)
goto out; goto out;
p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
if (!p->filename_trans)
goto out;
p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256); p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
if (!p->range_tr) if (!p->range_tr)
goto out; goto out;
ebitmap_init(&p->filename_trans_ttypes);
ebitmap_init(&p->policycaps); ebitmap_init(&p->policycaps);
ebitmap_init(&p->permissive_map); ebitmap_init(&p->permissive_map);
return 0; return 0;
out: out:
hashtab_destroy(p->filename_trans);
hashtab_destroy(p->range_tr);
for (i = 0; i < SYM_NUM; i++) for (i = 0; i < SYM_NUM; i++)
hashtab_destroy(p->symtab[i].table); hashtab_destroy(p->symtab[i].table);
return rc; return rc;
@ -417,32 +466,26 @@ static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
}; };
#ifdef DEBUG_HASHES #ifdef DEBUG_HASHES
static void symtab_hash_eval(struct symtab *s) static void hash_eval(struct hashtab *h, const char *hash_name)
{ {
int i;
for (i = 0; i < SYM_NUM; i++) {
struct hashtab *h = s[i].table;
struct hashtab_info info; struct hashtab_info info;
hashtab_stat(h, &info); hashtab_stat(h, &info);
printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
"longest chain length %d\n", symtab_name[i], h->nel, "longest chain length %d\n", hash_name, h->nel,
info.slots_used, h->size, info.max_chain_len); info.slots_used, h->size, info.max_chain_len);
}
} }
static void rangetr_hash_eval(struct hashtab *h) static void symtab_hash_eval(struct symtab *s)
{ {
struct hashtab_info info; int i;
hashtab_stat(h, &info); for (i = 0; i < SYM_NUM; i++)
printk(KERN_DEBUG "SELinux: rangetr: %d entries and %d/%d buckets used, " hash_eval(s[i].table, symtab_name[i]);
"longest chain length %d\n", h->nel,
info.slots_used, h->size, info.max_chain_len);
} }
#else #else
static inline void rangetr_hash_eval(struct hashtab *h) static inline void hash_eval(struct hashtab *h, char *hash_name)
{ {
} }
#endif #endif
@ -675,6 +718,16 @@ static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
cat_destroy, cat_destroy,
}; };
static int filenametr_destroy(void *key, void *datum, void *p)
{
struct filename_trans *ft = key;
kfree(ft->name);
kfree(key);
kfree(datum);
cond_resched();
return 0;
}
static int range_tr_destroy(void *key, void *datum, void *p) static int range_tr_destroy(void *key, void *datum, void *p)
{ {
struct mls_range *rt = datum; struct mls_range *rt = datum;
@ -709,7 +762,6 @@ void policydb_destroy(struct policydb *p)
int i; int i;
struct role_allow *ra, *lra = NULL; struct role_allow *ra, *lra = NULL;
struct role_trans *tr, *ltr = NULL; struct role_trans *tr, *ltr = NULL;
struct filename_trans *ft, *nft;
for (i = 0; i < SYM_NUM; i++) { for (i = 0; i < SYM_NUM; i++) {
cond_resched(); cond_resched();
@ -773,6 +825,9 @@ void policydb_destroy(struct policydb *p)
} }
kfree(lra); kfree(lra);
hashtab_map(p->filename_trans, filenametr_destroy, NULL);
hashtab_destroy(p->filename_trans);
hashtab_map(p->range_tr, range_tr_destroy, NULL); hashtab_map(p->range_tr, range_tr_destroy, NULL);
hashtab_destroy(p->range_tr); hashtab_destroy(p->range_tr);
@ -788,14 +843,7 @@ void policydb_destroy(struct policydb *p)
flex_array_free(p->type_attr_map_array); flex_array_free(p->type_attr_map_array);
} }
ft = p->filename_trans; ebitmap_destroy(&p->filename_trans_ttypes);
while (ft) {
nft = ft->next;
kfree(ft->name);
kfree(ft);
ft = nft;
}
ebitmap_destroy(&p->policycaps); ebitmap_destroy(&p->policycaps);
ebitmap_destroy(&p->permissive_map); ebitmap_destroy(&p->permissive_map);
@ -1795,7 +1843,7 @@ static int range_read(struct policydb *p, void *fp)
rt = NULL; rt = NULL;
r = NULL; r = NULL;
} }
rangetr_hash_eval(p->range_tr); hash_eval(p->range_tr, "rangetr");
rc = 0; rc = 0;
out: out:
kfree(rt); kfree(rt);
@ -1805,9 +1853,10 @@ out:
static int filename_trans_read(struct policydb *p, void *fp) static int filename_trans_read(struct policydb *p, void *fp)
{ {
struct filename_trans *ft, *last; struct filename_trans *ft;
u32 nel, len; struct filename_trans_datum *otype;
char *name; char *name;
u32 nel, len;
__le32 buf[4]; __le32 buf[4];
int rc, i; int rc, i;
@ -1816,25 +1865,23 @@ static int filename_trans_read(struct policydb *p, void *fp)
rc = next_entry(buf, fp, sizeof(u32)); rc = next_entry(buf, fp, sizeof(u32));
if (rc) if (rc)
goto out; return rc;
nel = le32_to_cpu(buf[0]); nel = le32_to_cpu(buf[0]);
last = p->filename_trans;
while (last && last->next)
last = last->next;
for (i = 0; i < nel; i++) { for (i = 0; i < nel; i++) {
ft = NULL;
otype = NULL;
name = NULL;
rc = -ENOMEM; rc = -ENOMEM;
ft = kzalloc(sizeof(*ft), GFP_KERNEL); ft = kzalloc(sizeof(*ft), GFP_KERNEL);
if (!ft) if (!ft)
goto out; goto out;
/* add it to the tail of the list */ rc = -ENOMEM;
if (!last) otype = kmalloc(sizeof(*otype), GFP_KERNEL);
p->filename_trans = ft; if (!otype)
else goto out;
last->next = ft;
last = ft;
/* length of the path component string */ /* length of the path component string */
rc = next_entry(buf, fp, sizeof(u32)); rc = next_entry(buf, fp, sizeof(u32));
@ -1862,10 +1909,22 @@ static int filename_trans_read(struct policydb *p, void *fp)
ft->stype = le32_to_cpu(buf[0]); ft->stype = le32_to_cpu(buf[0]);
ft->ttype = le32_to_cpu(buf[1]); ft->ttype = le32_to_cpu(buf[1]);
ft->tclass = le32_to_cpu(buf[2]); ft->tclass = le32_to_cpu(buf[2]);
ft->otype = le32_to_cpu(buf[3]);
otype->otype = le32_to_cpu(buf[3]);
rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
if (rc)
goto out;
hashtab_insert(p->filename_trans, ft, otype);
} }
rc = 0; hash_eval(p->filename_trans, "filenametr");
return 0;
out: out:
kfree(ft);
kfree(name);
kfree(otype);
return rc; return rc;
} }
@ -2266,6 +2325,11 @@ int policydb_read(struct policydb *p, void *fp)
p->symtab[i].nprim = nprim; p->symtab[i].nprim = nprim;
} }
rc = -EINVAL;
p->process_class = string_to_security_class(p, "process");
if (!p->process_class)
goto bad;
rc = avtab_read(&p->te_avtab, fp, p); rc = avtab_read(&p->te_avtab, fp, p);
if (rc) if (rc)
goto bad; goto bad;
@ -2298,8 +2362,17 @@ int policydb_read(struct policydb *p, void *fp)
tr->role = le32_to_cpu(buf[0]); tr->role = le32_to_cpu(buf[0]);
tr->type = le32_to_cpu(buf[1]); tr->type = le32_to_cpu(buf[1]);
tr->new_role = le32_to_cpu(buf[2]); tr->new_role = le32_to_cpu(buf[2]);
if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
rc = next_entry(buf, fp, sizeof(u32));
if (rc)
goto bad;
tr->tclass = le32_to_cpu(buf[0]);
} else
tr->tclass = p->process_class;
if (!policydb_role_isvalid(p, tr->role) || if (!policydb_role_isvalid(p, tr->role) ||
!policydb_type_isvalid(p, tr->type) || !policydb_type_isvalid(p, tr->type) ||
!policydb_class_isvalid(p, tr->tclass) ||
!policydb_role_isvalid(p, tr->new_role)) !policydb_role_isvalid(p, tr->new_role))
goto bad; goto bad;
ltr = tr; ltr = tr;
@ -2340,11 +2413,6 @@ int policydb_read(struct policydb *p, void *fp)
if (rc) if (rc)
goto bad; goto bad;
rc = -EINVAL;
p->process_class = string_to_security_class(p, "process");
if (!p->process_class)
goto bad;
rc = -EINVAL; rc = -EINVAL;
p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition"); p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition"); p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
@ -2517,8 +2585,9 @@ static int cat_write(void *vkey, void *datum, void *ptr)
return 0; return 0;
} }
static int role_trans_write(struct role_trans *r, void *fp) static int role_trans_write(struct policydb *p, void *fp)
{ {
struct role_trans *r = p->role_tr;
struct role_trans *tr; struct role_trans *tr;
u32 buf[3]; u32 buf[3];
size_t nel; size_t nel;
@ -2538,6 +2607,12 @@ static int role_trans_write(struct role_trans *r, void *fp)
rc = put_entry(buf, sizeof(u32), 3, fp); rc = put_entry(buf, sizeof(u32), 3, fp);
if (rc) if (rc)
return rc; return rc;
if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
buf[0] = cpu_to_le32(tr->tclass);
rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
}
} }
return 0; return 0;
@ -3045,7 +3120,7 @@ static int genfs_write(struct policydb *p, void *fp)
return 0; return 0;
} }
static int range_count(void *key, void *data, void *ptr) static int hashtab_cnt(void *key, void *data, void *ptr)
{ {
int *cnt = ptr; int *cnt = ptr;
*cnt = *cnt + 1; *cnt = *cnt + 1;
@ -3093,7 +3168,7 @@ static int range_write(struct policydb *p, void *fp)
/* count the number of entries in the hashtab */ /* count the number of entries in the hashtab */
nel = 0; nel = 0;
rc = hashtab_map(p->range_tr, range_count, &nel); rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
if (rc) if (rc)
return rc; return rc;
@ -3110,22 +3185,15 @@ static int range_write(struct policydb *p, void *fp)
return 0; return 0;
} }
static int filename_trans_write(struct policydb *p, void *fp) static int filename_write_helper(void *key, void *data, void *ptr)
{ {
struct filename_trans *ft;
u32 len, nel = 0;
__le32 buf[4]; __le32 buf[4];
struct filename_trans *ft = key;
struct filename_trans_datum *otype = data;
void *fp = ptr;
int rc; int rc;
u32 len;
for (ft = p->filename_trans; ft; ft = ft->next)
nel++;
buf[0] = cpu_to_le32(nel);
rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
for (ft = p->filename_trans; ft; ft = ft->next) {
len = strlen(ft->name); len = strlen(ft->name);
buf[0] = cpu_to_le32(len); buf[0] = cpu_to_le32(len);
rc = put_entry(buf, sizeof(u32), 1, fp); rc = put_entry(buf, sizeof(u32), 1, fp);
@ -3139,14 +3207,38 @@ static int filename_trans_write(struct policydb *p, void *fp)
buf[0] = ft->stype; buf[0] = ft->stype;
buf[1] = ft->ttype; buf[1] = ft->ttype;
buf[2] = ft->tclass; buf[2] = ft->tclass;
buf[3] = ft->otype; buf[3] = otype->otype;
rc = put_entry(buf, sizeof(u32), 4, fp); rc = put_entry(buf, sizeof(u32), 4, fp);
if (rc) if (rc)
return rc; return rc;
}
return 0; return 0;
} }
static int filename_trans_write(struct policydb *p, void *fp)
{
u32 nel;
__le32 buf[1];
int rc;
nel = 0;
rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
if (rc)
return rc;
buf[0] = cpu_to_le32(nel);
rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
if (rc)
return rc;
return 0;
}
/* /*
* Write the configuration data in a policy database * Write the configuration data in a policy database
* structure to a policy database binary representation * structure to a policy database binary representation
@ -3249,7 +3341,7 @@ int policydb_write(struct policydb *p, void *fp)
if (rc) if (rc)
return rc; return rc;
rc = role_trans_write(p->role_tr, fp); rc = role_trans_write(p, fp);
if (rc) if (rc)
return rc; return rc;

12
security/selinux/ss/policydb.h
View File

@ -72,17 +72,20 @@ struct role_datum {
struct role_trans { struct role_trans {
u32 role; /* current role */ u32 role; /* current role */
u32 type; /* program executable type */ u32 type; /* program executable type, or new object type */
u32 tclass; /* process class, or new object class */
u32 new_role; /* new role */ u32 new_role; /* new role */
struct role_trans *next; struct role_trans *next;
}; };
struct filename_trans { struct filename_trans {
struct filename_trans *next;
u32 stype; /* current process */ u32 stype; /* current process */
u32 ttype; /* parent dir context */ u32 ttype; /* parent dir context */
u16 tclass; /* class of new object */ u16 tclass; /* class of new object */
const char *name; /* last path component */ const char *name; /* last path component */
};
struct filename_trans_datum {
u32 otype; /* expected of new object */ u32 otype; /* expected of new object */
}; };
@ -227,7 +230,10 @@ struct policydb {
struct role_trans *role_tr; struct role_trans *role_tr;
/* file transitions with the last path component */ /* file transitions with the last path component */
struct filename_trans *filename_trans; /* quickly exclude lookups when parent ttype has no rules */
struct ebitmap filename_trans_ttypes;
/* actual set of filename_trans rules */
struct hashtab *filename_trans;
/* bools indexed by (value - 1) */ /* bools indexed by (value - 1) */
struct cond_bool_datum **bool_val_to_struct; struct cond_bool_datum **bool_val_to_struct;

58
security/selinux/ss/services.c
View File

@ -1359,26 +1359,35 @@ out:
} }
static void filename_compute_type(struct policydb *p, struct context *newcontext, static void filename_compute_type(struct policydb *p, struct context *newcontext,
u32 scon, u32 tcon, u16 tclass, u32 stype, u32 ttype, u16 tclass,
const struct qstr *qstr) const char *objname)
{ {
struct filename_trans *ft; struct filename_trans ft;
for (ft = p->filename_trans; ft; ft = ft->next) { struct filename_trans_datum *otype;
if (ft->stype == scon &&
ft->ttype == tcon && /*
ft->tclass == tclass && * Most filename trans rules are going to live in specific directories
!strcmp(ft->name, qstr->name)) { * like /dev or /var/run. This bitmap will quickly skip rule searches
newcontext->type = ft->otype; * if the ttype does not contain any rules.
*/
if (!ebitmap_get_bit(&p->filename_trans_ttypes, ttype))
return; return;
}
} ft.stype = stype;
ft.ttype = ttype;
ft.tclass = tclass;
ft.name = objname;
otype = hashtab_search(p->filename_trans, &ft);
if (otype)
newcontext->type = otype->otype;
} }
static int security_compute_sid(u32 ssid, static int security_compute_sid(u32 ssid,
u32 tsid, u32 tsid,
u16 orig_tclass, u16 orig_tclass,
u32 specified, u32 specified,
const struct qstr *qstr, const char *objname,
u32 *out_sid, u32 *out_sid,
bool kern) bool kern)
{ {
@ -1478,26 +1487,24 @@ static int security_compute_sid(u32 ssid,
newcontext.type = avdatum->data; newcontext.type = avdatum->data;
} }
/* if we have a qstr this is a file trans check so check those rules */ /* if we have a objname this is a file trans check so check those rules */
if (qstr) if (objname)
filename_compute_type(&policydb, &newcontext, scontext->type, filename_compute_type(&policydb, &newcontext, scontext->type,
tcontext->type, tclass, qstr); tcontext->type, tclass, objname);
/* Check for class-specific changes. */ /* Check for class-specific changes. */
if (tclass == policydb.process_class) {
if (specified & AVTAB_TRANSITION) { if (specified & AVTAB_TRANSITION) {
/* Look for a role transition rule. */ /* Look for a role transition rule. */
for (roletr = policydb.role_tr; roletr; for (roletr = policydb.role_tr; roletr; roletr = roletr->next) {
roletr = roletr->next) { if ((roletr->role == scontext->role) &&
if (roletr->role == scontext->role && (roletr->type == tcontext->type) &&
roletr->type == tcontext->type) { (roletr->tclass == tclass)) {
/* Use the role transition rule. */ /* Use the role transition rule. */
newcontext.role = roletr->new_role; newcontext.role = roletr->new_role;
break; break;
} }
} }
} }
}
/* Set the MLS attributes. /* Set the MLS attributes.
This is done last because it may allocate memory. */ This is done last because it may allocate memory. */
@ -1541,13 +1548,14 @@ int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
const struct qstr *qstr, u32 *out_sid) const struct qstr *qstr, u32 *out_sid)
{ {
return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION, return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION,
qstr, out_sid, true); qstr ? qstr->name : NULL, out_sid, true);
} }
int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, u32 *out_sid) int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
const char *objname, u32 *out_sid)
{ {
return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION, return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION,
NULL, out_sid, false); objname, out_sid, false);
} }
/** /**
@ -3190,7 +3198,7 @@ out:
* @len: length of data in bytes * @len: length of data in bytes
* *
*/ */
int security_read_policy(void **data, ssize_t *len) int security_read_policy(void **data, size_t *len)
{ {
int rc; int rc;
struct policy_file fp; struct policy_file fp;

11
security/smack/smack.h
View File

@ -316,22 +316,17 @@ static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a, static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
struct dentry *d) struct dentry *d)
{ {
a->a.u.fs.path.dentry = d; a->a.u.dentry = d;
}
static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
struct vfsmount *m)
{
a->a.u.fs.path.mnt = m;
} }
static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a, static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
struct inode *i) struct inode *i)
{ {
a->a.u.fs.inode = i; a->a.u.inode = i;
} }
static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a, static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
struct path p) struct path p)
{ {
a->a.u.fs.path = p; a->a.u.path = p;
} }
static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a, static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
struct sock *sk) struct sock *sk)

48
security/smack/smack_lsm.c
View File

@ -383,7 +383,7 @@ static int smack_sb_statfs(struct dentry *dentry)
int rc; int rc;
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
rc = smk_curacc(sbp->smk_floor, MAY_READ, &ad); rc = smk_curacc(sbp->smk_floor, MAY_READ, &ad);
@ -407,7 +407,7 @@ static int smack_sb_mount(char *dev_name, struct path *path,
struct superblock_smack *sbp = path->mnt->mnt_sb->s_security; struct superblock_smack *sbp = path->mnt->mnt_sb->s_security;
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, *path); smk_ad_setfield_u_fs_path(&ad, *path);
return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad); return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
@ -425,10 +425,13 @@ static int smack_sb_umount(struct vfsmount *mnt, int flags)
{ {
struct superblock_smack *sbp; struct superblock_smack *sbp;
struct smk_audit_info ad; struct smk_audit_info ad;
struct path path;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); path.dentry = mnt->mnt_root;
smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_root); path.mnt = mnt;
smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, path);
sbp = mnt->mnt_sb->s_security; sbp = mnt->mnt_sb->s_security;
return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad); return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
@ -563,7 +566,7 @@ static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
struct smk_audit_info ad; struct smk_audit_info ad;
int rc; int rc;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry); smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
isp = smk_of_inode(old_dentry->d_inode); isp = smk_of_inode(old_dentry->d_inode);
@ -592,7 +595,7 @@ static int smack_inode_unlink(struct inode *dir, struct dentry *dentry)
struct smk_audit_info ad; struct smk_audit_info ad;
int rc; int rc;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
/* /*
@ -623,7 +626,7 @@ static int smack_inode_rmdir(struct inode *dir, struct dentry *dentry)
struct smk_audit_info ad; struct smk_audit_info ad;
int rc; int rc;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
/* /*
@ -663,7 +666,7 @@ static int smack_inode_rename(struct inode *old_inode,
char *isp; char *isp;
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry); smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
isp = smk_of_inode(old_dentry->d_inode); isp = smk_of_inode(old_dentry->d_inode);
@ -700,7 +703,7 @@ static int smack_inode_permission(struct inode *inode, int mask, unsigned flags)
/* May be droppable after audit */ /* May be droppable after audit */
if (flags & IPERM_FLAG_RCU) if (flags & IPERM_FLAG_RCU)
return -ECHILD; return -ECHILD;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_INODE);
smk_ad_setfield_u_fs_inode(&ad, inode); smk_ad_setfield_u_fs_inode(&ad, inode);
return smk_curacc(smk_of_inode(inode), mask, &ad); return smk_curacc(smk_of_inode(inode), mask, &ad);
} }
@ -720,7 +723,7 @@ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
*/ */
if (iattr->ia_valid & ATTR_FORCE) if (iattr->ia_valid & ATTR_FORCE)
return 0; return 0;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
@ -736,10 +739,13 @@ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{ {
struct smk_audit_info ad; struct smk_audit_info ad;
struct path path;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); path.dentry = dentry;
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); path.mnt = mnt;
smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, path);
return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad); return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
} }
@ -784,7 +790,7 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name,
} else } else
rc = cap_inode_setxattr(dentry, name, value, size, flags); rc = cap_inode_setxattr(dentry, name, value, size, flags);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
if (rc == 0) if (rc == 0)
@ -845,7 +851,7 @@ static int smack_inode_getxattr(struct dentry *dentry, const char *name)
{ {
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad); return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
@ -877,7 +883,7 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name)
} else } else
rc = cap_inode_removexattr(dentry, name); rc = cap_inode_removexattr(dentry, name);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry); smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
if (rc == 0) if (rc == 0)
rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
@ -1047,7 +1053,7 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
int rc = 0; int rc = 0;
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path); smk_ad_setfield_u_fs_path(&ad, file->f_path);
if (_IOC_DIR(cmd) & _IOC_WRITE) if (_IOC_DIR(cmd) & _IOC_WRITE)
@ -1070,8 +1076,8 @@ static int smack_file_lock(struct file *file, unsigned int cmd)
{ {
struct smk_audit_info ad; struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path_dentry(&ad, file->f_path.dentry); smk_ad_setfield_u_fs_path(&ad, file->f_path);
return smk_curacc(file->f_security, MAY_WRITE, &ad); return smk_curacc(file->f_security, MAY_WRITE, &ad);
} }
@ -1089,7 +1095,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
struct smk_audit_info ad; struct smk_audit_info ad;
int rc; int rc;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path); smk_ad_setfield_u_fs_path(&ad, file->f_path);
switch (cmd) { switch (cmd) {