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There is a panic reported that on a system with x722 ethernet, when doing
the operations like:
# ip link add br0 type bridge
# ip link set eno1 master br0
# systemctl restart systemd-networkd
The system will panic "BUG: unable to handle kernel null pointer
dereference at 0000000000000034", with call chain:
i40iw_inetaddr_event
notifier_call_chain
blocking_notifier_call_chain
notifier_call_chain
__inet_del_ifa
inet_rtm_deladdr
rtnetlink_rcv_msg
netlink_rcv_skb
rtnetlink_rcv
netlink_unicast
netlink_sendmsg
sock_sendmsg
__sys_sendto
It is caused by "local_ipaddr = ntohl(in->ifa_list->ifa_address)", while
the in->ifa_list is NULL.
So add a check for the "in->ifa_list == NULL" case, and skip the ARP
operation accordingly.
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
ec4fe4bcc5