Li RongQing a6bcfc8969 net: check extack._msg before print
dev_set_mtu_ext is able to fail with a valid mtu value, at that
condition, extack._msg is not set and random since it is in stack,
then kernel will crash when print it.

Fixes: 7a4c53bee3324a ("net: report invalid mtu value via netlink extack")
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-05 17:24:45 -07:00
..
2018-07-30 09:10:25 -07:00
2018-08-05 17:24:45 -07:00
2018-08-03 21:12:12 +02:00
2018-07-16 00:12:09 -07:00
2018-03-27 13:18:09 -04:00
2018-08-02 14:47:49 -07:00
2018-08-04 13:05:39 -07:00