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Subject: Re: Fw: IPsec/crypto kernel panic in 2.6.[456]
From: Christophe Saout <christophe@saout.de>
To: akpm@osdl.org, linux-kernel@vger.kernel.org
Cc: James Morris <jmorris@redhat.com>, "David S. Miller" <davem@redhat.com>
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Date: Sun, 23 May 2004 16:33:22 +0200
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Hello,

Small update: Tobias Ringström told me that the Oops goes away when he
applies the bugfix I sent Andrew. We're still trying to find out what
exactly was happening.

> The two problems I found:
> 
> After calling scatterwalk_copychunks walk_in might point to the next
> page which will break scatterwalk_samebuf (in this case src_p should
> point to tmp_src anyway and scatterwalk_samembuf returns 0).
> 
> scatterwalk_samebuf should also check for equal offsets inside the
> page (just bad for performance in some cases).