From: Matthias Schiffer <mschiffer@universe-factory•net>
To: Steffen Klassert <steffen.klassert@secunet•com>,
David Miller <davem@davemloft•net>
Cc: Herbert Xu <herbert@gondor•apana.org.au>, netdev@vger•kernel.org
Subject: Re: [PATCH 3/3] xfrm: Fix null pointer dereference when decoding sessions
Date: Sun, 01 Dec 2013 05:19:53 +0100 [thread overview]
Message-ID: <529AB8E9.30004@universe-factory.net> (raw)
In-Reply-To: <52920CEE.2040407@universe-factory.net>
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On 11/24/2013 03:27 PM, Matthias Schiffer wrote:
> On 11/01/2013 09:21 AM, Steffen Klassert wrote:
>> On some codepaths the skb does not have a dst entry
>> when xfrm_decode_session() is called. So check for
>> a valid skb_dst() before dereferencing the device
>> interface index. We use 0 as the device index if
>> there is no valid skb_dst(), or at reverse decoding
>> we use skb_iif as device interface index.
>>
>> Bug was introduced with git commit bafd4bd4dc
>> ("xfrm: Decode sessions with output interface.").
>>
>> Reported-by: Meelis Roos <mroos@linux•ee>
>> Tested-by: Meelis Roos <mroos@linux•ee>
>> Signed-off-by: Steffen Klassert <steffen.klassert@secunet•com>
>
> Please queue this for 3.12-stable, I've seen this bug trigger a panic
> when heavily using Bittorrent (screenshot:
> http://i.imgur.com/OIKVccM.jpg )
>
> Thanks,
> Matthias
>
Ping? Several people I know have hit this panic with 3.12.x at least
once or twice by now during heavy IPv6 usage.
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next prev parent reply other threads:[~2013-12-01 4:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-01 8:21 pull request (net): ipsec 2013-11-01 Steffen Klassert
2013-11-01 8:21 ` [PATCH 1/3] xfrm: prevent ipcomp scratch buffer race condition Steffen Klassert
2013-11-01 8:21 ` [PATCH 2/3] xfrm: Increase the garbage collector threshold Steffen Klassert
2013-12-10 14:38 ` Maxime Bizon
2013-12-13 10:12 ` Steffen Klassert
2013-12-13 16:13 ` Maxime Bizon
2013-12-16 11:51 ` Steffen Klassert
2013-12-16 14:29 ` Maxime Bizon
2013-11-01 8:21 ` [PATCH 3/3] xfrm: Fix null pointer dereference when decoding sessions Steffen Klassert
2013-11-24 14:27 ` Matthias Schiffer
2013-12-01 4:19 ` Matthias Schiffer [this message]
2013-12-02 1:35 ` David Miller
2013-12-03 9:56 ` Steffen Klassert
2013-12-03 10:37 ` Wolfgang Walter
2013-12-03 10:41 ` Hannes Frederic Sowa
2013-12-05 21:35 ` David Miller
2013-11-02 5:22 ` pull request (net): ipsec 2013-11-01 David Miller
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