tree 07244aaf7352b018d8229d2cf1c7bfce577daaed
parent e0b6417be08850646d4e44ef1123772ec786baea
author Jussi Maki <joamaki@gmail.com> 1630918597 +0200
committer David S. Miller <davem@davemloft.net> 1630930329 +0100

bonding: Fix negative jump label count on nested bonding

With nested bonding devices the nested bond device's ndo_bpf was
called without a program causing it to decrement the static key
without a prior increment leading to negative count.

Fix the issue by 1) only calling slave's ndo_bpf when there's a
program to be loaded and 2) only decrement the count when a program
is unloaded.

Fixes: 9e2ee5c7e7c3 ("net, bonding: Add XDP support to the bonding driver")
Reported-by: syzbot+30622fb04ddd72a4d167@syzkaller.appspotmail.com
Signed-off-by: Jussi Maki <joamaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>