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authorEric Dumazet <edumazet@google.com>2014-10-23 17:30:30 +0400
committerDavid S. Miller <davem@davemloft.net>2014-10-27 05:47:23 +0300
commit93a35f59f1b13a02674877e3efdf07ae47e34052 (patch)
treec05bc7c401ea7889059f9c15e4c28807c38b0105 /net
parentaa9c5579153535fb317a9d34c7d8eaf02b7ef4cd (diff)
downloadlinux-93a35f59f1b13a02674877e3efdf07ae47e34052.tar.xz
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>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c4
1 files changed, 4 insertions, 0 deletions
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));