linux-kernel - Re: [PATCH] zram: set physical queue limits to avoid array out of bounds accesses

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Message-Id: <20170306121840.aaa0525d3dbdeb82aad3c284@linux-foundation.org>
Date:   Mon, 6 Mar 2017 12:18:40 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Jens Axboe <axboe@...com>
Cc:     Johannes Thumshirn <jthumshirn@...e.de>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Christoph Hellwig <hch@....de>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Hannes Reinecke <hare@...e.de>, <yizhan@...hat.com>,
        Linux Block Layer Mailinglist <linux-block@...r.kernel.org>,
        Linux Kernel Mailinglist <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] zram: set physical queue limits to avoid array out of
 bounds accesses

On Mon, 6 Mar 2017 08:21:11 -0700 Jens Axboe <axboe@...com> wrote:

> On 03/06/2017 03:23 AM, Johannes Thumshirn wrote:
> > zram can handle at most SECTORS_PER_PAGE sectors in a bio's bvec. When using
> > the NVMe over Fabrics loopback target which potentially sends a huge bulk of
> > pages attached to the bio's bvec this results in a kernel panic because of
> > array out of bounds accesses in zram_decompress_page().
> 
> Applied, thanks.

With an added cc:stable, hopefully?