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

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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>
This commit is contained in:
Aditya Pakki 2018-12-23 19:42:38 -06:00 committed by David S. Miller
parent 89dfd00837
commit 0eb987c874
1 changed files with 2 additions and 1 deletions
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3
net/core/net_namespace.c
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@ -917,7 +917,8 @@ static int __init net_ns_init(void)
init_net_initialized = true; init_net_initialized = true;
up_write(&pernet_ops_rwsem); 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_register(PF_UNSPEC, RTM_NEWNSID, rtnl_net_newid, NULL,
RTNL_FLAG_DOIT_UNLOCKED); RTNL_FLAG_DOIT_UNLOCKED);