linux-ext4 - Re: [PATCH 2/2] xfs: Fix crash in ext4_bdev_mark

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZJMO5Qm3n0Eg8uam@infradead.org>
Date:   Wed, 21 Jun 2023 07:53:25 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jan Kara <jack@...e.cz>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org
Subject: Re: [PATCH 2/2] xfs: Fix crash in ext4_bdev_mark_dead()

On Wed, Jun 21, 2023 at 04:47:43PM +0200, Jan Kara wrote:
> xfs_bdev_mark_dead() passes bdev->bd_holder to ext4_force_shutdown()
> instead of bdev->bd_super leading to crashes. Fix it.

xfs_bdev_mark_dead is only called for the log and RT devices, for which
the mp is passed as holder to blkdev_get_by_path.  bd_super won't be
set for those devices, so this patch will introduce a crash and not fix
one.