Signed-off-by: Roman Gushchin <kl...@yandex-team.ru>
--
@klamm
23.10.2014, 17:30, "Eric Dumazet" <eric.duma...@gmail.com>:
> From: Eric Dumazet <eduma...@google.com>
>
> Do not reuse skb if it was pfmemalloc tainted, otherwise
> future frame might be dropped anyway.
>
> Signed-off-by: Eric Dumazet <eduma...@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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