KASAN: use-after-free Read in do_shrink_slab

Hello, syzbot found the following crash on: HEAD commit:1f7a4c73a739 Merge tag '9p-for-4.19-2' of git://github.com.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16c46d9a40 kernel config: https://syzkaller.appspot.com/x/.config?x=68e80edb3c9718c5

KASAN: use-after-free Read in do_shrink_slab

Hello, syzbot found the following crash on: HEAD commit:1f7a4c73a739 Merge tag '9p-for-4.19-2' of git://github.com.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16c46d9a40 kernel config: https://syzkaller.appspot.com/x/.config?x=68e80edb3c9718c5