From: Jan Kara <jack@suse.cz>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
Dmitry Vyukov <dvyukov@google.com>, Ted Tso <tytso@mit.edu>,
yebin <yebin@huaweicloud.com>,
linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>
Subject: Re: [PATCH] block: Add config option to not allow writing to mounted devices
Date: Mon, 12 Jun 2023 18:25:45 +0200 [thread overview]
Message-ID: <20230612162545.frpr3oqlqydsksle@quack3> (raw)
In-Reply-To: <20230612161614.10302-1-jack@suse.cz>
On Mon 12-06-23 18:16:14, Jan Kara wrote:
> Writing to mounted devices is dangerous and can lead to filesystem
> corruption as well as crashes. Furthermore syzbot comes with more and
> more involved examples how to corrupt block device under a mounted
> filesystem leading to kernel crashes and reports we can do nothing
> about. Add config option to disallow writing to mounted (exclusively
> open) block devices. Syzbot can use this option to avoid uninteresting
> crashes. Also users whose userspace setup does not need writing to
> mounted block devices can set this config option for hardening.
>
> Link: https://lore.kernel.org/all/60788e5d-5c7c-1142-e554-c21d709acfd9@linaro.org
> Signed-off-by: Jan Kara <jack@suse.cz>
Please disregard this patch. I had uncommited fixups in my tree. I'll send
fixed version shortly. I'm sorry for the noise.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2023-06-12 16:25 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 16:16 [PATCH] block: Add config option to not allow writing to mounted devices Jan Kara
2023-06-12 16:25 ` Jan Kara [this message]
2023-06-12 17:39 ` Bart Van Assche
2023-06-12 17:47 ` Theodore Ts'o
2023-06-12 18:52 ` Colin Walters
2023-06-13 11:34 ` Jan Kara
2023-06-14 1:55 ` Darrick J. Wong
2023-06-14 7:14 ` Christoph Hellwig
2023-06-14 7:05 ` Christian Brauner
2023-06-14 7:07 ` Christoph Hellwig
2023-06-14 7:10 ` Christoph Hellwig
2023-06-14 10:12 ` Jan Kara
2023-06-14 14:30 ` Christoph Hellwig
2023-06-14 14:46 ` Matthew Wilcox
2023-06-13 4:56 ` kernel test robot
2023-06-13 5:10 ` Christoph Hellwig
2023-06-13 6:09 ` Dmitry Vyukov
2023-06-14 7:17 ` Christoph Hellwig
2023-06-14 8:18 ` Christian Brauner
2023-06-14 10:36 ` Jan Kara
2023-06-14 12:48 ` Christian Brauner
2023-06-15 14:39 ` Jan Kara
2023-06-14 14:31 ` Christoph Hellwig
2023-06-13 20:56 ` Jan Kara
2023-06-14 7:20 ` Christoph Hellwig
2023-06-20 10:41 ` Jan Kara
2023-06-20 11:29 ` Christoph Hellwig
2023-06-14 7:35 ` Christian Brauner
2023-06-13 6:49 ` Dmitry Vyukov
2023-06-13 19:22 ` Theodore Ts'o
2023-06-14 0:26 ` Dave Chinner
2023-06-14 2:04 ` Darrick J. Wong
2023-06-14 2:57 ` Theodore Ts'o
2023-06-14 12:27 ` Dmitry Vyukov
2023-06-14 23:38 ` Dave Chinner
2023-06-15 9:14 ` Dmitry Vyukov
2023-06-18 23:35 ` Dave Chinner
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