Re: WARNING in xfrm_alloc_compat

[syzbot]

syzbot has bisected this issue to:

commit 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3
Author: Dmitry Safonov <dima@xxxxxxxxxx>
Date:   Mon Sep 21 14:36:53 2020 +0000

    xfrm/compat: Attach xfrm dumps to 64=>32 bit translator

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=102aadf4500000
start commit:   2b94f526 net: stmmac: Fix channel lock initialization
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=122aadf4500000
console output: https://syzkaller.appspot.com/x/log.txt?x=142aadf4500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=803dd96a0e492ac1
dashboard link: https://syzkaller.appspot.com/bug?extid=a7e701c8385bd8543074
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15a6e324500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1382100c500000

Reported-by: syzbot+a7e701c8385bd8543074@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 5f3eea6b7e8f ("xfrm/compat: Attach xfrm dumps to 64=>32 bit translator")

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