linux-kernel - Re: [PATCH] block/compat_ioctl: fix range check in BLKGETSIZE

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Message-ID: <e40fc93d-ddb1-23a5-725c-e8ab613168cb@kernel.dk>
Date:   Thu, 2 Aug 2018 15:31:52 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Khazhismel Kumykov <khazhy@...gle.com>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block/compat_ioctl: fix range check in BLKGETSIZE

On 4/6/18 4:23 PM, Khazhismel Kumykov wrote:
> kernel ulong and compat_ulong_t may not be same width. Use type directly
> to eliminate mismatches.
> 
> This would result in truncation rather than EFBIG for 32bit mode for
> large disks.

Sorry for not getting to this. Applied, thanks.

-- 
Jens Axboe