netdev - Re: igmp: possible NULL dereference after GFP

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Date:	Tue, 30 Jan 2007 03:34:18 -0800
From:	David Stevens <dlstevens@...ibm.com>
To:	Alexey Dobriyan <adobriyan@...nvz.org>
Cc:	davem@...emloft.net, kuznet@....inr.ac.ru, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org
Subject: Re: igmp: possible NULL dereference after GFP_ATOMIC allocation?

Alexey,
        I think you're correct-- looks like it needs:

        if (!skb)
                return NULL;

just before the skb_put(), since an allocation (and failure)
could occur in either the igmpv3_newpack() call or in add_grhead().
        Also, similar code in net/ipv6/mcast..c.

        Will you be submitting the patch?

                                        +-DLS

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