linux-kernel - Re: [syzbot] [overlayfs?] possible deadlock in seq_read

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Date: Tue, 19 Dec 2023 16:30:03 -0800
From: syzbot <syzbot+da4f9f61f96525c62cc7@...kaller.appspotmail.com>
To: amir73il@...il.com, axboe@...nel.dk, hch@....de, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-unionfs@...r.kernel.org, miklos@...redi.hu, rafael@...nel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [overlayfs?] possible deadlock in seq_read_iter (2)

syzbot has bisected this issue to:

commit 1e8c813b083c4122dfeaa5c3b11028331026e85d
Author: Christoph Hellwig <hch@....de>
Date:   Wed May 31 12:55:32 2023 +0000

    PM: hibernate: don't use early_lookup_bdev in resume_store

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14b15592e80000
start commit:   2cf4f94d8e86 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16b15592e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=12b15592e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e5751b3a2226135d
dashboard link: https://syzkaller.appspot.com/bug?extid=da4f9f61f96525c62cc7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=176a4f49e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=154aa8d6e80000

Reported-by: syzbot+da4f9f61f96525c62cc7@...kaller.appspotmail.com
Fixes: 1e8c813b083c ("PM: hibernate: don't use early_lookup_bdev in resume_store")

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