general protection fault in security_inode_getattr

[syzbot]

syzbot has bisected this issue to:

commit 35697c12d7ffd31a56d3c9604066a166b75d0169
Author: Yonghong Song <yhs at fb.com>
Date:   Thu Jan 16 17:40:04 2020 +0000

    selftests/bpf: Fix test_progs send_signal flakiness with nmi mode

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13032139900000
start commit:   d012a719 Linux 5.9-rc2
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10832139900000
console output: https://syzkaller.appspot.com/x/log.txt?x=17032139900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650
dashboard link: https://syzkaller.appspot.com/bug?extid=f07cc9be8d1d226947ed
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=104a650e900000

Reported-by: syzbot+f07cc9be8d1d226947ed at syzkaller.appspotmail.com
Fixes: 35697c12d7ff ("selftests/bpf: Fix test_progs send_signal flakiness with nmi mode")

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