hsr: use rcu_read_lock() in hsr_get_node_{list/status}()
[ Upstream commit 173756b8 ] hsr_get_node_{list/status}() are not under rtnl_lock() because they are callback functions of generic netlink. But they use __dev_get_by_index() without rtnl_lock(). So, it would use unsafe data. In order to fix it, rcu_read_lock() and dev_get_by_index_rcu() are used instead of __dev_get_by_index(). Fixes: f421436a ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by:Taehee Yoo <ap420073@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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dabbf0e8
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