Messages in this thread Patch in this message |  | | Subject | [PATHC] net: napi_reuse_skb() should check pfmemalloc | From | Eric Dumazet <> | Date | Thu, 23 Oct 2014 06:30:30 -0700 |
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From: Eric Dumazet <edumazet@google.com>
Do not reuse skb if it was pfmemalloc tainted, otherwise future frame might be dropped anyway.
Signed-off-by: Eric Dumazet <edumazet@google.com> --- 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));
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