audit: don't reset working wait time accidentally with auditd

During a queue overflow condition while we are waiting for auditd to drain the
queue to make room for regular messages, we don't want a successful auditd that
has bypassed the queue check to reset the backlog wait time.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <pmoore@redhat.com>
diff --git a/kernel/audit.c b/kernel/audit.c
index 2125cc4..59d4ceb 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1395,7 +1395,8 @@
 		return NULL;
 	}
 
-	audit_backlog_wait_time = audit_backlog_wait_time_master;
+	if (!reserve)
+		audit_backlog_wait_time = audit_backlog_wait_time_master;
 
 	ab = audit_buffer_alloc(ctx, gfp_mask, type);
 	if (!ab) {