Re: [PATCH 2/3] smack: call WARN_ONCE() instead of calling audit_log_start()
On 12/4/2013 6:45 PM, Richard Guy Briggs wrote:
Remove the call to audit_log() (which call audit_log_start()) and
deal with
the errors in the caller, logging only once if the condition is met. Calling
audit_log_start() in this location makes buffer allocation and locking more
complicated in the calling tree (audit_filter_user()).
Signed-off-by: Richard Guy Briggs <rgb(a)redhat.com>
I'm not opposed to this change, but have you actually tried it?
---
security/smack/smack_lsm.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 8825375..185e2e7 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3615,9 +3615,8 @@ static int smack_audit_rule_match(u32 secid, u32 field, u32 op,
void *vrule,
struct smack_known *skp;
char *rule = vrule;
- if (!rule) {
- audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
- "Smack: missing rule\n");
+ if (unlikely(!rule)) {
+ WARN_ONCE(1, "Smack: missing rule\n");
return -ENOENT;
}