Hello,

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

Reported-and-tested-by:  
syzbot+d9c8bf24e56416d7ce2c@syzkaller.appspotmail.com

Tested on:

commit:         6525771f Merge tag 'arc-5.3-rc7' of git://git.kernel.org/p..
git tree:       https://github.com/google/kasan.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=e6131eafb9408877
dashboard link: https://syzkaller.appspot.com/bug?extid=d9c8bf24e56416d7ce2c
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
patch:          https://syzkaller.appspot.com/x/patch.diff?x=12610ef1600000

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