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udp: Fix a memory leak in udp_read_sock()
[ Upstream commit e00a5c3 ] sk_psock_verdict_recv() clones the skb and uses the clone afterward, so udp_read_sock() should free the skb after using it, regardless of error or not. This fixes a real kmemleak. Fixes: d7f5711 ("udp: Implement ->read_sock() for sockmap") Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210615021342.7416-4-xiyou.wangcong@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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