Commit bb76fe3f authored Dec 23, 2018 by Aditya Pakki Committed by Greg Kroah-Hartman Dec 05, 2019

net/net_namespace: Check the return value of register_pernet_subsys()



[ Upstream commit 0eb987c874dc93f9c9d85a6465dbde20fdd3884c ]

In net_ns_init(), register_pernet_subsys() could fail while registering
network namespace subsystems. The fix checks the return value and
sends a panic() on failure.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent ef354c62

net/core/net_namespace.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -913,7 +913,8 @@ static int __init net_ns_init(void)
		init_net_initialized = true;
		up_write(&pernet_ops_rwsem);

		register_pernet_subsys(&net_ns_ops);
		if (register_pernet_subsys(&net_ns_ops))
		panic("Could not register network namespace subsystems");

		rtnl_register(PF_UNSPEC, RTM_NEWNSID, rtnl_net_newid, NULL,
		RTNL_FLAG_DOIT_UNLOCKED);