linux-kernel - Re: [syzbot] [fs?] WARNING: ODEBUG bug in bdev_super

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Date: Fri, 29 Mar 2024 08:39:26 +0100
From: Christian Brauner <brauner@...nel.org>
To: syzbot <syzbot+9c0a93c676799fdf466c@...kaller.appspotmail.com>
Cc: jack@...e.cz, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] WARNING: ODEBUG bug in bdev_super_lock

On Thu, Mar 28, 2024 at 07:20:29AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=17d1c4f9180000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7
> dashboard link: https://syzkaller.appspot.com/bug?extid=9c0a93c676799fdf466c
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16577eb1180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=106fa941180000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/0f7abe4afac7/disk-fe46a7dd.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/82598d09246c/vmlinux-fe46a7dd.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/efa23788c875/bzImage-fe46a7dd.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9c0a93c676799fdf466c@...kaller.appspotmail.com

#syz fix: fs,block: get holder during claim