linux-kernel - Re: [PATCH] vduse: prevent uninitialized memory accesses

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Message-ID: <6f874c0b-cea2-e835-ad1c-8cd21fb1a82e@redhat.com>
Date:   Mon, 29 Aug 2022 09:23:30 +0200
From:   Maxime Coquelin <maxime.coquelin@...hat.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, elic@...dia.com,
        guanjun@...ux.alibaba.com, parav@...dia.com,
        gautam.dawar@...inx.com, xieyongji@...edance.com,
        jasowang@...hat.com, mst@...hat.com
Subject: Re: [PATCH] vduse: prevent uninitialized memory accesses



On 8/27/22 08:54, Dan Carpenter wrote:
> On Fri, Aug 26, 2022 at 06:16:05PM +0200, Maxime Coquelin wrote:
>> If the VDUSE application provides a smaller config space
>> than the driver expects, the driver may use uninitialized
>> memory from the stack.
>>
>> This patch prevents it by initializing the buffer passed by
>> the driver to store the config value.
>>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@...hat.com>
> 
> This sounds like it needs a Fixes tag?

Yes, I actually did it, but somehow forgot to generate the patch bedore
posting.

I'll post a v2 soon.

Thanks,
Maxime

> regards,
> dan carpenter
>