linux-kernel - Re: [syzbot] [kernfs?] [bcachefs?] UBSAN: shift-out-of-bounds in radix_tree_delete

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Message-ID: <67b0bf29.050a0220.6f0b7.0010.GAE@google.com>
Date: Sat, 15 Feb 2025 08:22:01 -0800
From: syzbot <syzbot+b581c7106aa616bb522c@...kaller.appspotmail.com>
To: davem@...emloft.net, dsahern@...nel.org, edumazet@...gle.com, 
	gregkh@...uxfoundation.org, horms@...nel.org, kent.overstreet@...ux.dev, 
	kuba@...nel.org, linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, 
	tj@...nel.org
Subject: Re: [syzbot] [kernfs?] [bcachefs?] UBSAN: shift-out-of-bounds in radix_tree_delete_item

syzbot has bisected this issue to:

commit 14152654805256d760315ec24e414363bfa19a06
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Mon Nov 25 05:21:27 2024 +0000

    bcachefs: Bad btree roots are now autofix

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=152659a4580000
start commit:   09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=172659a4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=132659a4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c516b1c112a81e77
dashboard link: https://syzkaller.appspot.com/bug?extid=b581c7106aa616bb522c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11e449b0580000

Reported-by: syzbot+b581c7106aa616bb522c@...kaller.appspotmail.com
Fixes: 141526548052 ("bcachefs: Bad btree roots are now autofix")

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