linux-kernel - Re: [syzbot] [xfs?] INFO: task hung in xfs_file

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Message-ID: <686f0cd3.050a0220.385921.0023.GAE@google.com>
Date: Wed, 09 Jul 2025 17:44:03 -0700
From: syzbot <syzbot+9bc8c0586b39708784d9@...kaller.appspotmail.com>
To: anna.luese@...ien.de, cem@...nel.org, davem@...emloft.net, 
	edumazet@...gle.com, horms@...nel.org, jhs@...atatu.com, jiri@...nulli.us, 
	john.ogness@...utronix.de, kuba@...nel.org, linux-kernel@...r.kernel.org, 
	linux-xfs@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	pmladek@...e.com, rostedt@...dmis.org, senozhatsky@...omium.org, 
	syzkaller-bugs@...glegroups.com, xiyou.wangcong@...il.com
Subject: Re: [syzbot] [xfs?] INFO: task hung in xfs_file_fsync

syzbot has bisected this issue to:

commit 0161e2d6950fe66cf6ac1c10d945bae971f33667
Author: John Ogness <john.ogness@...utronix.de>
Date:   Mon Dec 9 11:17:46 2024 +0000

    printk: Defer legacy printing when holding printk_cpu_sync

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14b19a8c580000
start commit:   d006330be3f7 Merge tag 'sound-6.16-rc6' of git://git.kerne..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16b19a8c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=12b19a8c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b309c907eaab29da
dashboard link: https://syzkaller.appspot.com/bug?extid=9bc8c0586b39708784d9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15e24a8c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10ed3582580000

Reported-by: syzbot+9bc8c0586b39708784d9@...kaller.appspotmail.com
Fixes: 0161e2d6950f ("printk: Defer legacy printing when holding printk_cpu_sync")

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