lkml.org 
[lkml]   [2014]   [Oct]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATHC] net: napi_reuse_skb() should check pfmemalloc
From
Date
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));



\
 
 \ /
  Last update: 2014-10-23 16:01    [W:0.050 / U:1.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site