diff options
| author | Roman Kubiak <r.kubiak@samsung.com> | 2015-08-10 16:54:25 +0200 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:48:25 +0900 |
| commit | 31d910badeb0ddcd3ca07924343857f263d1136c (patch) | |
| tree | 2e2d6fbd4e0ddabd2cdd1b0f201f0f2965d83d53 /security | |
| parent | 44e48ee3e171c4c68a24a7419293c2a3ef458d93 (diff) | |
Kernel threads excluded from smack checks
Adds an ignore case for kernel tasks,
so that they can access all resources.
Since kernel worker threads are spawned with
floor label, they are severely restricted by
Smack policy. It is not an issue without onlycap,
as these processes also run with root,
so CAP_MAC_OVERRIDE kicks in. But with onlycap
turned on, there is no way to change the label
for these processes.
Signed-off-by: Roman Kubiak <r.kubiak@samsung.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/smack/smack_access.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c index 012785a78973..89d18bfae53a 100644 --- a/security/smack/smack_access.c +++ b/security/smack/smack_access.c @@ -651,6 +651,12 @@ int smack_privileged(int cap) struct smack_known *skp = smk_of_current(); struct smack_onlycap *sop; + /* + * All kernel tasks are privileged + */ + if (unlikely(current->flags & PF_KTHREAD)) + return 1; + if (!capable(cap)) return 0; |