diff options
| author | Feng Tang <feng.tang@intel.com> | 2019-03-14 18:37:29 +0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-03-17 21:40:40 -0300 |
| commit | ec4fe4bcc584b55e24e8d1768f5510a62c0fd619 (patch) | |
| tree | 8efef3aaadcc9085bd098f60f710cd6c9eb82e4c /kernel/trace/trace.c | |
| parent | cd27287562d69629c5f007c6f64c27b6ff15f3e5 (diff) | |
| download | linux-ec4fe4bcc584b55e24e8d1768f5510a62c0fd619.tar.bz2 | |
i40iw: Avoid panic when handling the inetdev event
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>
Diffstat (limited to 'kernel/trace/trace.c')
0 files changed, 0 insertions, 0 deletions