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

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Message-ID: <96ed9003-6299-b303-a901-d040a8cfe03f@fb.com>
Date:   Mon, 6 Mar 2017 08:21:11 -0700
From:   Jens Axboe <axboe@...com>
To:     Johannes Thumshirn <jthumshirn@...e.de>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>
CC:     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 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.

-- 
Jens Axboe