Re: [syzbot] [bcachefs?] UBSAN: array-index-out-of-bounds in bch2_accounting_validate

syzbot
2025-08-04T17:26:05Z

syzbot has bisected this issue to:

commit 557f8c582a9ba8abe6aa0fd734b6f342af106b26
Author: Kees Cook <keescook@chromium.org>
Date: Thu Jan 18 23:06:05 2024 +0000

ubsan: Reintroduce signed overflow sanitizer

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=161982f0580000
start commit: 352af6a011d5 Merge tag 'rust-6.17' of git://git.kernel.org..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=151982f0580000
console output: https://syzkaller.appspot.com/x/log.txt?x=111982f0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=cae1291240e8962a
dashboard link: https://syzkaller.appspot.com/bug?extid=cd063f869beedf5b9cd7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14dcc6a2580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=133e02f0580000

Reported-by: syzbot+cd063f869beedf5b9cd7@syzkaller.appspotmail.com
Fixes: 557f8c582a9b ("ubsan: Reintroduce signed overflow sanitizer")

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