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

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+bc022c162e3b001bf607@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         73f41663 Merge branch 'for-6.3/iter-ubuf' into for-next
git tree:       git://git.kernel.dk/linux.git for-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15a52c5e480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2b6ecad960fc703e
dashboard link: https://syzkaller.appspot.com/bug?extid=bc022c162e3b001bf607
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.