linux-kernel - Re: [syzbot] [reiserfs?] possible deadlock in super

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Date: Sun, 24 Dec 2023 08:40:05 -0800
From: syzbot <syzbot+062317ea1d0a6d5e29e7@...kaller.appspotmail.com>
To: axboe@...nel.dk, brauner@...nel.org, chao@...nel.org, christian@...uner.io, 
	daniel.vetter@...ll.ch, hch@....de, hdanton@...a.com, jack@...e.cz, 
	jaegeuk@...nel.org, jinpu.wang@...os.com, 
	linux-f2fs-devel@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mairacanal@...eup.net, mcanal@...lia.com, 
	reiserfs-devel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	terrelln@...com, willy@...radead.org, yukuai3@...wei.com
Subject: Re: [syzbot] [reiserfs?] possible deadlock in super_lock

syzbot suspects this issue was fixed by commit:

commit fd1464105cb37a3b50a72c1d2902e97a71950af8
Author: Jan Kara <jack@...e.cz>
Date:   Wed Oct 18 15:29:24 2023 +0000

    fs: Avoid grabbing sb->s_umount under bdev->bd_holder_lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14639595e80000
start commit:   2cf0f7156238 Merge tag 'nfs-for-6.6-2' of git://git.linux-..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=710dc49bece494df
dashboard link: https://syzkaller.appspot.com/bug?extid=062317ea1d0a6d5e29e7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=107e9518680000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fs: Avoid grabbing sb->s_umount under bdev->bd_holder_lock

For information about bisection process see: https://goo.gl/tpsmEJ#bisection