linux-kernel - Re: [PATCH] nilfs2: fix kernel bug due to missing clearing of buffer delay flag

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20241016-dreiviertel-erzittern-f8742ac9db30@brauner>
Date: Wed, 16 Oct 2024 15:05:45 +0200
From: Christian Brauner <brauner@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Ryusuke Konishi <konishi.ryusuke@...il.com>
Cc: Christian Brauner <brauner@...nel.org>,
	linux-nilfs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	syzbot <syzbot+985ada84bf055a575c07@...kaller.appspotmail.com>,
	syzkaller-bugs@...glegroups.com,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] nilfs2: fix kernel bug due to missing clearing of buffer delay flag

On Wed, 16 Oct 2024 06:32:07 +0900, Ryusuke Konishi wrote:
> Syzbot reported that after nilfs2 reads a corrupted file system image
> and degrades to read-only, the BUG_ON check for the buffer delay flag
> in submit_bh_wbc() may fail, causing a kernel bug.
> 
> This is because the buffer delay flag is not cleared when clearing the
> buffer state flags to discard a page/folio or a buffer head. So, fix
> this.
> 
> [...]

Applied to the vfs.fixes branch of the vfs/vfs.git tree.
Patches in the vfs.fixes branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.fixes

[1/1] nilfs2: fix kernel bug due to missing clearing of buffer delay flag
      https://git.kernel.org/vfs/vfs/c/6ed469df0bfb