diff options
| author | Casey Schaufler <casey@schaufler-ca.com> | 2014-04-29 00:23:01 +0200 |
|---|---|---|
| committer | Casey Schaufler <casey@schaufler-ca.com> | 2014-04-30 19:49:33 +0200 |
| commit | 36ea735b522d09826ae0dac0e540f294436c52f3 (patch) | |
| tree | 1ac278374b75442609e8245f55059e53005cbece /security | |
| parent | Smack: Verify read access on file open - v3 (diff) | |
| download | linux-36ea735b522d09826ae0dac0e540f294436c52f3.tar.xz linux-36ea735b522d09826ae0dac0e540f294436c52f3.zip | |
Smack: Label cgroup files for systemd
The cgroup filesystem isn't ready for an LSM to
properly use extented attributes. This patch makes
files created in the cgroup filesystem usable by
a system running Smack and systemd.
Targeted for git://git.gitorious.org/smack-next/kernel.git
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/smack/smack_lsm.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 7bcf9edf768d..9cb7559d60b2 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2821,6 +2821,15 @@ 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) { + /* + * The cgroup filesystem is never mounted, + * so there's no opportunity to set the mount + * options. + */ + sbsp->smk_root = smack_known_star.smk_known; + sbsp->smk_default = smack_known_star.smk_known; + } isp->smk_inode = sbsp->smk_root; isp->smk_flags |= SMK_INODE_INSTANT; goto unlockandout; @@ -2834,16 +2843,20 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode) */ switch (sbp->s_magic) { case SMACK_MAGIC: + case PIPEFS_MAGIC: + case SOCKFS_MAGIC: + case CGROUP_SUPER_MAGIC: /* * Casey says that it's a little embarrassing * that the smack file system doesn't do * extended attributes. - */ - final = smack_known_star.smk_known; - break; - case PIPEFS_MAGIC: - /* + * * Casey says pipes are easy (?) + * + * Socket access is controlled by the socket + * structures associated with the task involved. + * + * Cgroupfs is special */ final = smack_known_star.smk_known; break; @@ -2855,13 +2868,6 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode) */ final = ckp->smk_known; break; - case SOCKFS_MAGIC: - /* - * Socket access is controlled by the socket - * structures associated with the task involved. - */ - final = smack_known_star.smk_known; - break; case PROC_SUPER_MAGIC: /* * Casey says procfs appears not to care. |