linux-kernel - Re: [PATCH][next] null_blk: Fix null pointer dereference on nullb->disk on blk_cleanup

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Message-ID: <ce16729c-01c6-7ce8-6c06-c43439186683@kernel.dk>
Date:   Thu, 3 Jun 2021 09:54:45 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Colin King <colin.king@...onical.com>,
        Damien Le Moal <damien.lemoal@....com>,
        Christoph Hellwig <hch@....de>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-block@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] null_blk: Fix null pointer dereference on
 nullb->disk on blk_cleanup_disk call

On 6/2/21 4:06 AM, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The error handling on a nullb->disk allocation currently jumps to
> out_cleanup_disk that calls blk_cleanup_disk with a null pointer causing
> a null pointer dereference issue. Fix this by jumping to out_cleanup_tags
> instead.

Applied, thanks.

-- 
Jens Axboe