Re: [PATCH] lightnvm: wrong offset in bad blk lun calculation

From	Jens Axboe <axboe@kernel.dk>
Newsgroups	linux.kernel
Subject	Re: [PATCH] lightnvm: wrong offset in bad blk lun calculation
Date	2015-12-29 16:30 +0100
Message-ID	<qL4nM-2iM-5@gated-at.bofh.it> (permalink)
References	<qL2Fl-17h-19@gated-at.bofh.it> <qL2Fl-17h-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 12/29/2015 06:37 AM, Matias Bjørling wrote:
> dev->nr_luns reports the total number of luns available in a device
> while dev->luns_per_chnl is the number of luns per channel.
>
> When multiple channels are available, the offset is calculated from a
> channel and lun id into a linear array. As it multiplies with
> the total number of luns, we go out of bound when channel id > 0 and
> causes the kernel to panic when we read a protected kernel memory area.

Added for 4.4, thanks.

-- 
Jens Axboe

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[PATCH] lightnvm: wrong offset in bad blk lun calculation Matias Bjørling <m@bjorling.me> - 2015-12-29 14:40 +0100
  Re: [PATCH] lightnvm: wrong offset in bad blk lun calculation Jens Axboe <axboe@kernel.dk> - 2015-12-29 16:30 +0100

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