Commit 93a35f59 authored Oct 23, 2014 by Eric Dumazet Committed by David S. Miller Oct 26, 2014

net: napi_reuse_skb() should check pfmemalloc



Do not reuse skb if it was pfmemalloc tainted, otherwise
future frame might be dropped anyway.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Roman Gushchin <klamm@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent aa9c5579

net/core/dev.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -4157,6 +4157,10 @@ EXPORT_SYMBOL(napi_gro_receive);

		static void napi_reuse_skb(struct napi_struct napi, struct sk_buff skb)
		{
		if (unlikely(skb->pfmemalloc)) {
		consume_skb(skb);
		return;
		}
		__skb_pull(skb, skb_headlen(skb));
		/* restore the reserve we had after netdev_alloc_skb_ip_align() */
		skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN - skb_headroom(skb));