From: sashiko-bot@kernel.org
To: "Zhao Gongyi" <zhaogongyi@bytedance.com>
Cc: linux-ext4@vger.kernel.org, tytso@mit.edu
Subject: Re: [PATCH] ext4: use a stable source for the kmmpd thread name
Date: Sat, 14 Nov 2026 17:32:48 +0000 [thread overview]
Message-ID: <sashiko-outbox-214838@kernel.org> (raw)
In-Reply-To: <20261114172523.5888-1-zhaogongyi@bytedance.com>
> A concurrent MMP mount can make kvasprintf() warn about different
> vsnprintf() return values while creating kmmpd. The call chain is
> ext4_multi_mount_protect() -> kthread_run() -> kvasprintf(): the name
> comes from mmp_bdevname in the MMP block buffer, which may change
> between the two formatting passes.
>
> Format the device name into a local buffer and use it for the thread
> name while retaining it in the MMP information field.
>
> Fixes: d6986ce24fc0 ("kthread: dynamically allocate memory to store kthread's full name")
> Signed-off-by: Zhao Gongyi <zhaogongyi@bytedance.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261114172523.5888-1-zhaogongyi@bytedance.com?part=1
prev parent reply other threads:[~2026-11-14 17:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-14 17:25 [PATCH] ext4: use a stable source for the kmmpd thread name Zhao Gongyi
2026-11-14 17:32 ` sashiko-bot [this message]
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