linux-kernel - Re: [syzbot] [bcachefs?] KASAN: slab-use-after-free Read in bch2

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Message-ID: <686ec42b.050a0220.385921.001e.GAE@google.com>
Date: Wed, 09 Jul 2025 12:34:03 -0700
From: syzbot <syzbot+3168625f36f4a539237e@...kaller.appspotmail.com>
To: anna.luese@...ien.de, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] KASAN: slab-use-after-free Read in bch2_copygc

syzbot has bisected this issue to:

commit 82067c916994dd1bfec65496144dc16e17899e36
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Fri May 9 03:21:28 2025 +0000

    bcachefs: buckets_in_flight on stack

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10d6aa8c580000
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=12d6aa8c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14d6aa8c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bd2783a0a99d4ed0
dashboard link: https://syzkaller.appspot.com/bug?extid=3168625f36f4a539237e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=175fabd4580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14c0bf70580000

Reported-by: syzbot+3168625f36f4a539237e@...kaller.appspotmail.com
Fixes: 82067c916994 ("bcachefs: buckets_in_flight on stack")

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