From 93a35f59f1b13a02674877e3efdf07ae47e34052 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 23 Oct 2014 06:30:30 -0700 Subject: [PATCH] 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 Signed-off-by: Roman Gushchin Signed-off-by: David S. Miller --- net/core/dev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index b793e3521a36..945bbd001359 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -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)); -- 2.20.1