diff options
| author |   Stephen Smalley <sds@tycho.nsa.gov> | 2018-12-12 10:10:55 -0500 |
|---|---|---|
| committer |   Paul Moore <paul@paul-moore.com> | 2019-01-10 20:32:53 -0500 |
| commit | 3a28cff3bd4bf43f02be0c4e7933aebf3dc8197e (patch) | |
| tree | 64f75c4103e27e02a5edf203bf5f8a1a420ab1e8 /security/selinux/include | |
| parent | Linux 5.0-rc1 (diff) | |
| download | linux-dev-3a28cff3bd4bf43f02be0c4e7933aebf3dc8197e.tar.xz linux-dev-3a28cff3bd4bf43f02be0c4e7933aebf3dc8197e.zip | |
selinux: avoid silent denials in permissive mode under RCU walk
commit 0dc1ba24f7fff6 ("SELINUX: Make selinux cache VFS RCU walks safe")
results in no audit messages at all if in permissive mode because the
cache is updated during the rcu walk and thus no denial occurs on
the subsequent ref walk. Fix this by not updating the cache when
performing a non-blocking permission check. This only affects search
and symlink read checks during rcu walk.
Fixes: 0dc1ba24f7fff6 ("SELINUX: Make selinux cache VFS RCU walks safe")
Reported-by: BMK <bmktuwien@gmail.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security/selinux/include')
| -rw-r--r-- | security/selinux/include/avc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h index ef899bcfd2cb..74ea50977c20 100644 --- a/security/selinux/include/avc.h +++ b/security/selinux/include/avc.h @@ -142,6 +142,7 @@ static inline int avc_audit(struct selinux_state *state, #define AVC_STRICT 1 /* Ignore permissive mode. */ #define AVC_EXTENDED_PERMS 2 /* update extended permissions */ +#define AVC_NONBLOCKING 4 /* non blocking */ int avc_has_perm_noaudit(struct selinux_state *state, u32 ssid, u32 tsid, u16 tclass, u32 requested, |