tree c37eef5d98338c65240a52abd30499faca04b1cb
parent ff946833b70e0c7f93de9a3f5b329b5ae2287b38
author Hangbin Liu <liuhangbin@gmail.com> 1557384848 +0800
committer David S. Miller <davem@davemloft.net> 1557419435 -0700

macvlan: disable SIOCSHWTSTAMP in container

Miroslav pointed that with NET_ADMIN enabled in container, a normal user
could be mapped to root and is able to change the real device's rx
filter via ioctl on macvlan, which would affect the other ptp process on
host. Fix it by disabling SIOCSHWTSTAMP in container.

Fixes: 254c0a2bfedb ("macvlan: pass get_ts_info and SIOC[SG]HWTSTAMP ioctl to real device")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>