Hello,

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

Reported-and-tested-by:  
syzbot+10007d66ca02b08f0e60@syzkaller.appspotmail.com

Tested on:

commit:         e93c9c99 Linux 5.1
git tree:        
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git v5.1
kernel config:  https://syzkaller.appspot.com/x/.config?x=5edd1df52e9bc982
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
patch:          https://syzkaller.appspot.com/x/patch.diff?x=135c5b02a00000

Note: testing is done by a robot and is best-effort only.