Re: [syzbot] KASAN: use-after-free Read in exit_mmap

[syzbot]

syzbot has bisected this issue to:

commit e23cb70bcbef5c189790042d1d6d89e33308c386
Author: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Date:   Tue Jun 21 20:47:14 2022 +0000

    mm: remove the vma linked list

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1078f202080000
start commit:   cb71b93c2dc3 Add linux-next specific files for 20220628
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1278f202080000
console output: https://syzkaller.appspot.com/x/log.txt?x=1478f202080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb
dashboard link: https://syzkaller.appspot.com/bug?extid=99551d8b4d180f6cb1c0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=117dc816080000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12695b26080000

Reported-by: syzbot+99551d8b4d180f6cb1c0@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e23cb70bcbef ("mm: remove the vma linked list")

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