netdev - [PATCH] Make dev_kfree_skb_any check if the skb is valid

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Message-ID: <20070418223339.GE13146@hovland.org>
Date:	Wed, 18 Apr 2007 15:33:44 -0700
From:	Erik Hovland <erik@...land.org>
To:	netdev@...r.kernel.org
Cc:	trivial@...nel.org
Subject: [PATCH] Make dev_kfree_skb_any check if the skb is valid

If dev_kfree_skb_any is called and it then calls dev_kfree_skb_irq.
That call will dereference the skb. If the skb is invalid, down the
drain we go.

This one-liner checks to see if the skb is valid as part of the
determination of whether to call dev_kfree_skb_irq.

Signed-off-by: Erik Hovland <erik@...land.org>

---

 net/core/dev.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 4dc93cc..85f4a4c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1131,7 +1131,7 @@ EXPORT_SYMBOL(__netif_rx_schedule);
 
 void dev_kfree_skb_any(struct sk_buff *skb)
 {
-	if (in_irq() || irqs_disabled())
+	if (skb && (in_irq() || irqs_disabled()))
 		dev_kfree_skb_irq(skb);
 	else
 		dev_kfree_skb(skb);

-
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