linux-kernel - Re: [PATCH] block: Fix the maximum minor value is blk_alloc_ext

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Message-Id: <164847098496.6880.2578259301021456744.b4-ty@kernel.dk>
Date:   Mon, 28 Mar 2022 06:36:24 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Hannes Reinecke <hare@...e.de>, Jan Kara <jack@...e.cz>
Cc:     linux-block@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: Fix the maximum minor value is blk_alloc_ext_minor()

On Sat, 26 Mar 2022 15:50:46 +0100, Christophe JAILLET wrote:
> ida_alloc_range(..., min, max, ...) returns values from min to max,
> inclusive.
> 
> So, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().
> 
> This is an issue because in device_add_disk(), this value is used in:
>    ddev->devt = MKDEV(disk->major, disk->first_minor);
> and NR_EXT_DEVT is '(1 << MINORBITS)'.
> 
> [...]

Applied, thanks!

[1/1] block: Fix the maximum minor value is blk_alloc_ext_minor()
      commit: d1868328dec5ae2cf210111025fcbc71f78dd5ca

Best regards,
-- 
Jens Axboe