linux-kernel - Re: [PATCH] xen/gntdev: avoid out of bounds access in case of partial gntdev

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <5f9794ec-1fa2-f51f-8ecf-a922646364e1@oracle.com>
Date:   Thu, 26 Oct 2017 18:54:55 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH] xen/gntdev: avoid out of bounds access in case of partial
 gntdev_mmap()

On 10/25/2017 12:46 PM, Boris Ostrovsky wrote:
> On 10/25/2017 11:08 AM, Juergen Gross wrote:
>> In case gntdev_mmap() succeeds only partially in mapping grant pages
>> it will leave some vital information uninitialized needed later for
>> cleanup. This will lead to an out of bounds array access when unmapping
>> the already mapped pages.
>>
>> So just initialize the data needed for unmapping the pages a little bit
>> earlier.
>>
>> Cc: <stable@...r.kernel.org>
>> Reported-by: Arthur Borsboom <arthurborsboom@...il.com>
>> Signed-off-by: Juergen Gross <jgross@...e.com>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
>


Applied to for-linus-4.14c.

-boris