Re: [syzbot] KASAN: use-after-free Read in disk_part_iter_next (2)

[syzbot]

syzbot has bisected this issue to:

commit a33df75c6328bf40078b35f2040d8e54d574c357
Author: Christoph Hellwig <hch@xxxxxx>
Date:   Sun Jan 24 10:02:41 2021 +0000

    block: use an xarray for disk->part_tbl

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17989906d00000
start commit:   1c273e10 Merge tag 'zonefs-5.12-rc4' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14589906d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=10589906d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6abda3336c698a07
dashboard link: https://syzkaller.appspot.com/bug?extid=8fede7e30c7cee0de139
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13dfe8bed00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=155a117cd00000

Reported-by: syzbot+8fede7e30c7cee0de139@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a33df75c6328 ("block: use an xarray for disk->part_tbl")

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