| commit | a6bcfc89694ed8cb482a82cdc8b93aae63a8b691 | [log] [tgz] |
|---|---|---|
| author | Li RongQing <lirongqing@baidu.com> | Fri Aug 03 15:45:21 2018 +0800 |
| committer | David S. Miller <davem@davemloft.net> | Sun Aug 05 17:24:45 2018 -0700 |
| tree | 5b4432cdf877af3ad989eb12c1d63f481dc89a8b | |
| parent | 0ed4229b08c13c84a3c301a08defdc9e7f4467e6 [diff] |
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>