linux-kernel - Re: [syzbot] [bcachefs?] possible deadlock in bch2_gc_mark

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Date: Fri, 21 Jun 2024 15:17:02 -0700
From: syzbot <syzbot+050e797ad21ccc3f5d1a@...kaller.appspotmail.com>
To: bfoster@...hat.com, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	lizhi.xu@...driver.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] possible deadlock in bch2_gc_mark_key

syzbot has bisected this issue to:

commit 103304021e54bfb5cab9ba04cd5ef0dc2bf33888
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Sat Apr 20 02:44:12 2024 +0000

    bcachefs: Move gc of bucket.oldest_gen to workqueue

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=162879ea980000
start commit:   50736169ecc8 Merge tag 'for-6.10-rc4-tag' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=112879ea980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=12f98862a3c0c799
dashboard link: https://syzkaller.appspot.com/bug?extid=050e797ad21ccc3f5d1a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=144f0a61980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17cab6a6980000

Reported-by: syzbot+050e797ad21ccc3f5d1a@...kaller.appspotmail.com
Fixes: 103304021e54 ("bcachefs: Move gc of bucket.oldest_gen to workqueue")

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