[PATCH] sanity check audit_buffer

Add sanity checks for NULL audit_buffer consistent with other
audit_log* routines.

Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/audit.c b/kernel/audit.c
index 0a36091ed712..963fd15c9621 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1028,6 +1028,9 @@ void audit_log_hex(struct audit_buffer *ab, const unsigned char *buf,
         struct sk_buff *skb;
         static const unsigned char *hex = "0123456789ABCDEF";
 
+        if (!ab)
+                return;
+
         BUG_ON(!ab->skb);
         skb = ab->skb;
         avail = skb_tailroom(skb);
@@ -1060,6 +1063,9 @@ static void audit_log_n_string(struct audit_buffer *ab, size_t slen,
         unsigned char *ptr;
         struct sk_buff *skb;
 
+        if (!ab)
+                return;
+
         BUG_ON(!ab->skb);
         skb = ab->skb;
         avail = skb_tailroom(skb);