Commit 1d8c2326 authored by Łukasz Stelmach's avatar Łukasz Stelmach Committed by Casey Schaufler

smack: introduce a special case for tmpfs in smack_d_instantiate()

Files created with __shmem_file_stup() appear to have somewhat fake
dentries which make them look like root directories and not get
the label the current process or ("*") star meant for tmpfs files.
Signed-off-by: default avatarŁukasz Stelmach <l.stelmach@samsung.com>
parent 68390ccf
......@@ -3036,7 +3036,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* of the superblock.
*/
if (opt_dentry->d_parent == opt_dentry) {
if (sbp->s_magic == CGROUP_SUPER_MAGIC) {
switch (sbp->s_magic) {
case CGROUP_SUPER_MAGIC:
/*
* The cgroup filesystem is never mounted,
* so there's no opportunity to set the mount
......@@ -3044,8 +3045,19 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
*/
sbsp->smk_root = &smack_known_star;
sbsp->smk_default = &smack_known_star;
isp->smk_inode = sbsp->smk_root;
break;
case TMPFS_MAGIC:
/*
* What about shmem/tmpfs anonymous files with dentry
* obtained from d_alloc_pseudo()?
*/
isp->smk_inode = smk_of_current();
break;
default:
isp->smk_inode = sbsp->smk_root;
break;
}
isp->smk_inode = sbsp->smk_root;
isp->smk_flags |= SMK_INODE_INSTANT;
goto unlockandout;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment