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(parent: 08099d6) | patch
net: check extack._msg before print
authorLi RongQing <lirongqing@baidu.com>
Fri, 3 Aug 2018 07:45:21 +0000 (15:45 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 6 Aug 2018 00:24:45 +0000 (17:24 -0700)
commitb75541c141ddfc24662e10dcc24b13d68da535ae
tree5b4432cdf877af3ad989eb12c1d63f481dc89a8btree | snapshot
parent08099d67b071ce8d5a2fd0477fa47fdb8223c12bcommit | 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: 2cfe5260cdd859 ("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>
net/core/dev.c diff | blob | history
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