Since skb_dequeue() may return NULL we risk dereferencing a NULL pointer at
if (!skb->sk)
This patch avoids that by also testing for a NULL skb.
Signed-off-by: Jesper Juhl <[email protected]>
---
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 2652ead..a3c885f 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -620,7 +620,7 @@ static int llc_ui_accept(struct socket *
llc_sk(sk)->laddr.lsap);
skb = skb_dequeue(&sk->sk_receive_queue);
rc = -EINVAL;
- if (!skb->sk)
+ if (!skb || !skb->sk)
goto frees;
rc = 0;
newsk = skb->sk;
-
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