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-rw-r--r--security/selinux/hooks.c119
1 files changed, 71 insertions, 48 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f9c3764e485..a0d38459d65 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -990,6 +990,7 @@ static void selinux_write_opts(struct seq_file *m,
continue;
default:
BUG();
+ return;
};
/* we need a comma before each option */
seq_putc(m, ',');
@@ -1443,11 +1444,15 @@ static int task_has_capability(struct task_struct *tsk,
printk(KERN_ERR
"SELinux: out of range capability %d\n", cap);
BUG();
+ return -EINVAL;
}
rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd);
- if (audit == SECURITY_CAP_AUDIT)
- avc_audit(sid, sid, sclass, av, &avd, rc, &ad);
+ if (audit == SECURITY_CAP_AUDIT) {
+ int rc2 = avc_audit(sid, sid, sclass, av, &avd, rc, &ad, 0);
+ if (rc2)
+ return rc2;
+ }
return rc;
}
@@ -1467,7 +1472,8 @@ static int task_has_system(struct task_struct *tsk,
static int inode_has_perm(const struct cred *cred,
struct inode *inode,
u32 perms,
- struct common_audit_data *adp)
+ struct common_audit_data *adp,
+ unsigned flags)
{
struct inode_security_struct *isec;
struct common_audit_data ad;
@@ -1483,28 +1489,41 @@ static int inode_has_perm(const struct cred *cred,
if (!adp) {
adp = &ad;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.inode = inode;
+ COMMON_AUDIT_DATA_INIT(&ad, INODE);
+ ad.u.inode = inode;
}
- return avc_has_perm(sid, isec->sid, isec->sclass, perms, adp);
+ return avc_has_perm_flags(sid, isec->sid, isec->sclass, perms, adp, flags);
}
/* Same as inode_has_perm, but pass explicit audit data containing
the dentry to help the auditing code to more easily generate the
pathname if needed. */
static inline int dentry_has_perm(const struct cred *cred,
- struct vfsmount *mnt,
struct dentry *dentry,
u32 av)
{
struct inode *inode = dentry->d_inode;
struct common_audit_data ad;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.mnt = mnt;
- ad.u.fs.path.dentry = dentry;
- return inode_has_perm(cred, inode, av, &ad);
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.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);
}
/* Check whether a task can use an open file descriptor to
@@ -1525,8 +1544,8 @@ static int file_has_perm(const struct cred *cred,
u32 sid = cred_sid(cred);
int rc;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path = file->f_path;
+ COMMON_AUDIT_DATA_INIT(&ad, PATH);
+ ad.u.path = file->f_path;
if (sid != fsec->sid) {
rc = avc_has_perm(sid, fsec->sid,
@@ -1540,7 +1559,7 @@ static int file_has_perm(const struct cred *cred,
/* av is zero if only checking access to the descriptor. */
rc = 0;
if (av)
- rc = inode_has_perm(cred, inode, av, &ad);
+ rc = inode_has_perm(cred, inode, av, &ad, 0);
out:
return rc;
@@ -1564,8 +1583,8 @@ static int may_create(struct inode *dir,
sid = tsec->sid;
newsid = tsec->create_sid;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.dentry = dentry;
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.dentry = dentry;
rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
DIR__ADD_NAME | DIR__SEARCH,
@@ -1574,7 +1593,8 @@ static int may_create(struct inode *dir,
return rc;
if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
- rc = security_transition_sid(sid, dsec->sid, tclass, NULL, &newsid);
+ rc = security_transition_sid(sid, dsec->sid, tclass,
+ &dentry->d_name, &newsid);
if (rc)
return rc;
}
@@ -1616,8 +1636,8 @@ static int may_link(struct inode *dir,
dsec = dir->i_security;
isec = dentry->d_inode->i_security;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.dentry = dentry;
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.dentry = dentry;
av = DIR__SEARCH;
av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
@@ -1662,9 +1682,9 @@ static inline int may_rename(struct inode *old_dir,
old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
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,
DIR__REMOVE_NAME | DIR__SEARCH, &ad);
if (rc)
@@ -1680,7 +1700,7 @@ static inline int may_rename(struct inode *old_dir,
return rc;
}
- ad.u.fs.path.dentry = new_dentry;
+ ad.u.dentry = new_dentry;
av = DIR__ADD_NAME | DIR__SEARCH;
if (new_dentry->d_inode)
av |= DIR__REMOVE_NAME;
@@ -1890,7 +1910,7 @@ static int selinux_quota_on(struct dentry *dentry)
{
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)
@@ -1987,8 +2007,8 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
return rc;
}
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path = bprm->file->f_path;
+ COMMON_AUDIT_DATA_INIT(&ad, PATH);
+ ad.u.path = bprm->file->f_path;
if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
new_tsec->sid = old_tsec->sid;
@@ -2103,7 +2123,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
file = file_priv->file;
inode = file->f_path.dentry->d_inode;
if (inode_has_perm(cred, inode,
- FILE__READ | FILE__WRITE, NULL)) {
+ FILE__READ | FILE__WRITE, NULL, 0)) {
drop_tty = 1;
}
}
@@ -2116,7 +2136,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
/* Revalidate access to inherited open files. */
- COMMON_AUDIT_DATA_INIT(&ad, FS);
+ COMMON_AUDIT_DATA_INIT(&ad, INODE);
spin_lock(&files->file_lock);
for (;;) {
@@ -2464,8 +2484,8 @@ static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
if (flags & MS_KERNMOUNT)
return 0;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.dentry = sb->s_root;
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.dentry = sb->s_root;
return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
}
@@ -2474,8 +2494,8 @@ static int selinux_sb_statfs(struct dentry *dentry)
const struct cred *cred = current_cred();
struct common_audit_data ad;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.dentry = dentry->d_sb->s_root;
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.dentry = dentry->d_sb->s_root;
return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
}
@@ -2491,8 +2511,7 @@ static int selinux_mount(char *dev_name,
return superblock_has_perm(cred, path->mnt->mnt_sb,
FILESYSTEM__REMOUNT, NULL);
else
- return dentry_has_perm(cred, path->mnt, path->dentry,
- FILE__MOUNTON);
+ return path_has_perm(cred, path, FILE__MOUNTON);
}
static int selinux_umount(struct vfsmount *mnt, int flags)
@@ -2625,17 +2644,17 @@ static int selinux_inode_readlink(struct dentry *dentry)
{
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)
{
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)
+static int selinux_inode_permission(struct inode *inode, int mask, unsigned flags)
{
const struct cred *cred = current_cred();
struct common_audit_data ad;
@@ -2649,15 +2668,15 @@ static int selinux_inode_permission(struct inode *inode, int mask)
if (!mask)
return 0;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.inode = inode;
+ COMMON_AUDIT_DATA_INIT(&ad, INODE);
+ ad.u.inode = inode;
if (from_access)
ad.selinux_audit_data.auditdeny |= FILE__AUDIT_ACCESS;
perms = file_mask_to_av(inode->i_mode, mask);
- return inode_has_perm(cred, inode, perms, &ad);
+ return inode_has_perm(cred, inode, perms, &ad, flags);
}
static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
@@ -2675,16 +2694,20 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
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)
{
const struct cred *cred = current_cred();
+ struct path path;
+
+ path.dentry = dentry;
+ path.mnt = mnt;
- return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR);
+ return path_has_perm(cred, &path, FILE__GETATTR);
}
static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
@@ -2705,7 +2728,7 @@ static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
/* Not an attribute we recognize, so just check the
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,
@@ -2728,8 +2751,8 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
if (!inode_owner_or_capable(inode))
return -EPERM;
- COMMON_AUDIT_DATA_INIT(&ad, FS);
- ad.u.fs.path.dentry = dentry;
+ COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+ ad.u.dentry = dentry;
rc = avc_has_perm(sid, isec->sid, isec->sclass,
FILE__RELABELFROM, &ad);
@@ -2792,14 +2815,14 @@ static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
{
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)
{
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)
@@ -3205,7 +3228,7 @@ static int selinux_dentry_open(struct file *file, const struct cred *cred)
* new inode label or new policy.
* This check is not redundant - do not remove.
*/
- return inode_has_perm(cred, inode, open_file_to_av(file), NULL);
+ return inode_has_perm(cred, inode, open_file_to_av(file), NULL, 0);
}
/* task security operations */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-30 20:39:19 +0000