Re: [syzbot] [bcachefs?] KASAN: use-after-free Read in poly1305_update

[syzbot]

syzbot has bisected this issue to:

commit d97de0d017cde0d442c3d144b4f969f43064cc0f
Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Date:   Tue Aug 13 01:31:25 2024 +0000

    bcachefs: Make bkey_fsck_err() a wrapper around fsck_err()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1683290c580000
start commit:   02adc1490e6d Merge tag 'spi-fix-v6.16-rc1' of git://git.ke..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1583290c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=1183290c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=162faeb2d1eaefb4
dashboard link: https://syzkaller.appspot.com/bug?extid=bfaeaa8e26281970158d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1555310c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12810e82580000

Reported-by: syzbot+bfaeaa8e26281970158d@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: d97de0d017cd ("bcachefs: Make bkey_fsck_err() a wrapper around fsck_err()")

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