4.14-stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu herbert@gondor.apana.org.au
commit d16b46e4fd8bc6063624605f25b8c0835bb1fbe3 upstream.
We do not need locking in xfrm_trans_queue because it is designed to use per-CPU buffers. However, the original code incorrectly used skb_queue_tail which takes the lock. This patch switches it to __skb_queue_tail instead.
Reported-and-tested-by: Artem Savkov asavkov@redhat.com Fixes: acf568ee859f ("xfrm: Reinject transport-mode packets...") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Alistair Strachan astrachan@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/xfrm/xfrm_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -518,7 +518,7 @@ int xfrm_trans_queue(struct sk_buff *skb return -ENOBUFS;
XFRM_TRANS_SKB_CB(skb)->finish = finish; - skb_queue_tail(&trans->queue, skb); + __skb_queue_tail(&trans->queue, skb); tasklet_schedule(&trans->tasklet); return 0; }