[syzbot] [jffs2?] KASAN: slab-use-after-free Read in jffs2_xattr_delete_inode

[syzbot]

syzbot has bisected this issue to:

commit 7b09acdcb944a9be6acc38ab1aa8a0ffd08871c1
Author: Joachim Wiberg <troglobit at gmail.com>
Date:   Sat Oct 9 06:09:55 2021 +0000

    mtd: block2mtd: add support for an optional custom MTD label

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14e7b13e580000
start commit:   32c52ec87d62 x86/insn-eval: Fix shadowed segment index in ..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16e7b13e580000
console output: https://syzkaller.appspot.com/x/log.txt?x=12e7b13e580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b38d39c45202f4fa
dashboard link: https://syzkaller.appspot.com/bug?extid=3a8099322b09d8d073d1
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17684bc9580000

Reported-by: syzbot+3a8099322b09d8d073d1 at syzkaller.appspotmail.com
Fixes: 7b09acdcb944 ("mtd: block2mtd: add support for an optional custom MTD label")

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