netdev - Re: NULL pointer dereference panic in stable (2.6.33.2), amd64

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Message-ID: <1271364375.16881.3099.camel@edumazet-laptop>
Date:	Thu, 15 Apr 2010 22:46:15 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	krkumar2@...ibm.com, netdev@...r.kernel.org,
	nuclearcat@...learcat.com
Subject: Re: NULL pointer dereference panic in stable (2.6.33.2), amd64

Le jeudi 15 avril 2010 à 22:30 +0200, Eric Dumazet a écrit :
>  
> @@ -1938,6 +1928,8 @@ gso:
>  		if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
>  			skb_dst_drop(nskb);
>  
> +		skb_orphan(nskb);
> +
>  		rc = ops->ndo_start_xmit(nskb, dev);
>  		if (unlikely(rc != NETDEV_TX_OK)) {
>  			if (rc & ~NETDEV_TX_MASK)

Well, might need to test if skb is not shared before orphaning it

	if (!skb_shared(skb))
		skb_orphan(nskb);



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