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

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[ 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>
This commit is contained in:
Aditya Pakki 2018-12-23 19:42:38 -06:00 committed by Greg Kroah-Hartman
parent 3c1af2c0a3
commit 9b852f0a54
1 changed files with 2 additions and 1 deletions
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3
net/core/net_namespace.c
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@ -802,7 +802,8 @@ static int __init net_ns_init(void)
mutex_unlock(&net_mutex);
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, NULL);
rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, rtnl_net_dumpid,