netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()

stable inclusion
from stable-v5.10.146
commit b043a525a3f5520abb676a7cd8f6328fdf959e88
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0VX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b043a525a3f5520abb676a7cd8f6328fdf959e88



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[ Upstream commit 9a4d6dd5 ]

It seems to me that percpu memory for chain stats started leaking since
commit 3bc158f8 ("netfilter: nf_tables: map basechain priority to
hardware priority") when nft_chain_offload_priority() returned an error.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 3bc158f8 ("netfilter: nf_tables: map basechain priority to hardware priority")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>