From: sashiko-bot@kernel.org
To: "Adriano Cordova" <adrianox@gmail.com>
Cc: tytso@mit.edu, linux-ext4@vger.kernel.org
Subject: Re: [PATCH] ext4: wipe moved dirents with their real length
Date: Fri, 02 Oct 2026 09:14:26 +0000 [thread overview]
Message-ID: <20261002091426.CA5971F00899@smtp.kernel.org> (raw)
In-Reply-To: <20261002004127.1332310-1-adrianox@gmail.com>
> After copying a dirent to the new block, dx_move_dirents() wipes the
> source entry using the on-disk rec_len. Use the length already
> computed for the copy instead because the on-disk rec_len is untrusted
> and a corrupt value makes the memset() run out of bounds.
>
> Reported-by: syzbot+09bec78ee77613a3efdd@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=09bec78ee77613a3efdd
> Tested-by: syzbot+09bec78ee77613a3efdd@syzkaller.appspotmail.com
> Signed-off-by: Adriano Cordova <adrianox@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261002004127.1332310-1-adrianox@gmail.com?part=1
next prev parent reply other threads:[~2026-10-02 9:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-02 0:41 [PATCH] ext4: wipe moved dirents with their real length Adriano Cordova
2026-10-02 9:14 ` sashiko-bot [this message]
2026-10-02 12:44 ` Jan Kara
2026-10-05 0:33 ` Adriano Córdova
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