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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2013-10-08 10:49:51 +0200 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2013-10-08 10:49:51 +0200 |
| commit | 2bb53e2557964c2c5368a0392cf3b3b63a288cd0 (patch) | |
| tree | a62a0dd7f1cbfe4dab7826e0769d9a0a8fde81c3 | |
| parent | e7d8f6cb2f8735693396872f4608bbe305e8baee (diff) | |
| download | linux-2bb53e2557964c2c5368a0392cf3b3b63a288cd0.tar.bz2 | |
xfrm: check for a vaild skb in xfrm_policy_queue_process
We might dreference a NULL pointer if the hold_queue is empty,
so add a check to avoid this.
Bug was introduced with git commit a0073fe18 ("xfrm: Add a state
resolution packet queue")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 5f9be976770e..76e1873811d4 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1772,6 +1772,10 @@ static void xfrm_policy_queue_process(unsigned long arg) spin_lock(&pq->hold_queue.lock); skb = skb_peek(&pq->hold_queue); + if (!skb) { + spin_unlock(&pq->hold_queue.lock); + goto out; + } dst = skb_dst(skb); sk = skb->sk; xfrm_decode_session(skb, &fl, dst->ops->family); |