bonding: Fix negative jump label count on nested bonding

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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: 9e2ee5c7e7 ("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>

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Jussi Maki 2021-09-06 10:56:37 +02:00 • committed by David S. Miller

parent e0b6417be0

commit 6d5f1ef838

1 changed files with 5 additions and 6 deletions

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11

drivers/net/bonding/bond_main.c

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