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    Subject[PATCH 4.9 074/125] net/net_namespace: Check the return value of register_pernet_subsys()
    Date
    From: Aditya Pakki <pakki001@umn.edu>

    [ 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>
    ---
    net/core/net_namespace.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
    index 4509dec7bd1cd..7630fa80db92a 100644
    --- a/net/core/net_namespace.c
    +++ b/net/core/net_namespace.c
    @@ -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,
    --
    2.20.1


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