stable inclusion
from stable-v5.10.84
commit 3fc88660ede60a5f6a7a8bf48efe6f5bfaae6cb1
bugzilla: 186030 https://gitee.com/openeuler/kernel/issues/I4QV2F

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3fc88660ede60a5f6a7a8bf48efe6f5bfaae6cb1

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[ Upstream commit 6def4801 ]

When kmemdup called failed and register_net_sysctl return NULL, should
return ENOMEM instead of ENOBUFS
Signed-off-by: Nliuguoqiang <liuguoqiang@uniontech.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>