linux-kernel - Re: net: socket: NULL ptr deref in sendmsg

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Date:	Mon, 14 Jul 2014 15:08:47 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sasha.levin@...cle.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	davej@...hat.com, a.ryabinin@...sung.com
Subject: Re: net: socket: NULL ptr deref in sendmsg

From: Sasha Levin <sasha.levin@...cle.com>
Date: Sun, 13 Jul 2014 17:50:53 -0400

> While fuzzing with trinity inside a KVM tools guest running the latest -next
> kernel with the KASAN patchset, I've stumbled on the following spew:
 ...
> It's similar to another variation:
 ...
> I've tried debugging it, but I don't see a code path that could lead to that.

Both of these cases involve working with pointers declared with
DECLARE_SOCKADDR, maybe that somehow confuses ASAN code generation?
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