blob: 5043c009956e35e0f692a94426b5cbdf8d947dba [file] [log] [blame]
From 66c46d741e2e60f0e8b625b80edb0ab820c46d7a Mon Sep 17 00:00:00 2001
From: Herbert Xu <>
Date: Sat, 29 Jan 2011 20:44:54 -0800
Subject: gro: Reset dev pointer on reuse
From: Herbert Xu <>
commit 66c46d741e2e60f0e8b625b80edb0ab820c46d7a upstream.
On older kernels the VLAN code may zero skb->dev before dropping
it and causing it to be reused by GRO.
Unfortunately we didn't reset skb->dev in that case which causes
the next GRO user to get a bogus skb->dev pointer.
This particular problem no longer happens with the current upstream
kernel due to changes in VLAN processing.
However, for correctness we should still reset the skb->dev pointer
in the GRO reuse function in case a future user does the same thing.
Signed-off-by: Herbert Xu <>
Signed-off-by: David S. Miller <>
Signed-off-by: Brandon Philips <>
Signed-off-by: Greg Kroah-Hartman <>
net/core/dev.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2746,6 +2746,7 @@ void napi_reuse_skb(struct napi_struct *
__skb_pull(skb, skb_headlen(skb));
skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
+ skb->dev = napi->dev;
napi->skb = skb;