linux-kernel - Re: [PATCH 3.19 091/123] gadgetfs: use-after-free in ->aio

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Message-ID: <5513DDEF.1000409@ahsoftware.de>
Date:	Thu, 26 Mar 2015 11:22:39 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 3.19 091/123] gadgetfs: use-after-free in ->aio_read()

Am 25.03.2015 um 12:15 schrieb Alexander Holler:
> Am 25.03.2015 um 12:08 schrieb Greg Kroah-Hartman:
>> On Wed, Mar 25, 2015 at 11:58:46AM +0100, Alexander Holler wrote:
>>>> As this has been broken since 3.16, and no one has taken the time to
>>>> fix
>>>> it since then, it's not really an issue here, people can just use
>>>> 4.0 if
>>>> they want it.

Just a last comment: I've no idea if the bug might be exploitable. I 
haven't had a deeper look at what it fixes but in regard to memory 
problems I would prefer a careful solution. So even without fixing the 
problem of an undefined return code in case of an oom (and the imho more 
problematic ugly output of a (with gcc 4.9 colored) warning when 
compiling the kernel, it might be better to apply the patch.

Regards,

Alexander Holler
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