net: return correct error code
[ Upstream commit 6def4801 ] When kmemdup called failed and register_net_sysctl return NULL, should return ENOMEM instead of ENOBUFS Signed-off-by:liuguoqiang <liuguoqiang@uniontech.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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