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

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Message-ID: <670d560b.050a0220.4cbc0.004e.GAE@google.com>
Date: Mon, 14 Oct 2024 10:34:03 -0700
From: syzbot <syzbot+c3a3a153f0190dca5be9@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, fdmanana@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, wqu@...e.com
Subject: Re: [syzbot] [btrfs?] KASAN: slab-use-after-free Read in add_delayed_ref

syzbot has bisected this issue to:

commit a3aad8f4f5d9d9a977ee5be32b07bcc083cc8d28
Author: Filipe Manana <fdmanana@...e.com>
Date:   Tue Sep 24 16:12:32 2024 +0000

    btrfs: qgroups: remove bytenr field from struct btrfs_qgroup_extent_record

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14596887980000
start commit:   d61a00525464 Add linux-next specific files for 20241011
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16596887980000
console output: https://syzkaller.appspot.com/x/log.txt?x=12596887980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8554528c7f4bf3fb
dashboard link: https://syzkaller.appspot.com/bug?extid=c3a3a153f0190dca5be9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1266c727980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17ce9440580000

Reported-by: syzbot+c3a3a153f0190dca5be9@...kaller.appspotmail.com
Fixes: a3aad8f4f5d9 ("btrfs: qgroups: remove bytenr field from struct btrfs_qgroup_extent_record")

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