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libbpf: Close map fd if init map slots failed
[ Upstream commit a0f2b7a ] Previously we forgot to close the map fd if bpf_map_update_elem() failed during map slot init, which will leak map fd. Let's move map slot initialization to new function init_map_slots() to simplify the code. And close the map fd if init slot failed. Reported-by: Andrii Nakryiko <andrii.nakryiko@gmail.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201006021345.3817033-2-liuhangbin@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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