From: Benjamin Poirier <[email protected]> ------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
This one liner is part of upstream commit 3701e51382a026cba10c60b03efabe534fba4ca4 Author: Jesse Gross <[email protected]> vlan: Centralize handling of hardware acceleration. The bulk of that commit is a rework of the hardware assisted vlan tagging driver interface, and as such doesn't classify for -stable inclusion. The fix that is needed is a part of that commit but can work independently of the rest. This patch can avoid panics on the 2.6.32.y -stable kernels and is in the same spirit as mainline commits 66c46d7 gro: Reset dev pointer on reuse 6d152e2 gro: reset skb_iif on reuse which are already in -stable. For drivers using the vlan_gro_frags() interface, a packet with an invalid tci leads to GRO_DROP and napi_reuse_skb(). The skb has to be sanitized before being reused or we may send an skb with an invalid vlan_tci field up the stack where it is not expected. Signed-off-by: Benjamin Poirier <[email protected]> Cc: Jesse Gross <[email protected]> Acked-by: David S. Miller <[email protected]> [PG: taken from v2.6.32.y stable, commit 5aff28abc7e] Signed-off-by: Paul Gortmaker <[email protected]> --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/dev.c b/net/core/dev.c index 7daff00..2aaf2e6 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2823,6 +2823,7 @@ 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->vlan_tci = 0; skb->dev = napi->dev; skb->skb_iif = 0; -- 1.7.12.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
