linux-kernel - Re: [syzbot] [ext4?] possible deadlock in ext4_xattr_inode

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Message-ID: <20241107171441.he2rix37qopi6ane@quack3>
Date: Thu, 7 Nov 2024 18:14:41 +0100
From: Jan Kara <jack@...e.cz>
To: syzbot <syzbot+ee72b9a7aad1e5a77c5c@...kaller.appspotmail.com>
Cc: adilger.kernel@...ger.ca, adilger@...ger.ca, eadavis@...com,
	hdanton@...a.com, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com, tytso@....edu,
	wojciech.gladysz@...ogain.com
Subject: Re: [syzbot] [ext4?] possible deadlock in ext4_xattr_inode_iget (3)

On Sat 02-11-24 15:58:03, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit d1bc560e9a9c78d0b2314692847fc8661e0aeb99
> Author: Wojciech Gładysz <wojciech.gladysz@...ogain.com>
> Date:   Thu Aug 1 14:38:27 2024 +0000
> 
>     ext4: nested locking for xattr inode
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1245f55f980000
> start commit:   fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1a07d5da4eb21586
> dashboard link: https://syzkaller.appspot.com/bug?extid=ee72b9a7aad1e5a77c5c
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12407f45180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=140d9db1180000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 

Makes sense:

#syz fix: ext4: nested locking for xattr inode

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR