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authorHerbert Xu <herbert@gondor.apana.org.au>2011-01-29 20:44:54 -0800
committerAndi Kleen <ak@linux.intel.com>2011-04-28 08:20:59 -0700
commit760a5d738e7fe9bcdf6dd6a573541edb01a95ac2 (patch)
tree0debc0722d90c270fba47ef4dddbcc0934e65ffb /net
parent38a4189d5c25a817018416dee94b52bd9be2e7c5 (diff)
gro: Reset dev pointer on reuse
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 <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 7c3e7c36c0b..bd6c169e250 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3231,6 +3231,7 @@ void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
{
__skb_pull(skb, skb_headlen(skb));
skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
+ skb->dev = napi->dev;
napi->skb = skb;
}