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

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Date:   Mon, 6 Mar 2017 19:45:42 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Johannes Thumshirn <jthumshirn@...e.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Jens Axboe <axboe@...com>, 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 (03/06/17 11:23), 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().
> 
> Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>

Cc Andrew
Link: lkml.kernel.org/r/20170306102335.9180-1-jthumshirn@...e.de


Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

thanks!

	-ss