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[ Upstream commit8f7b239ea8] It's not enough to just free(map->inner_map), as inner_map itself can have extra memory allocated, like map name. Fixes:646f02ffdd("libbpf: Add BTF-defined map-in-map support") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Hengqi Chen <hengqi.chen@gmail.com> Link: https://lore.kernel.org/bpf/20211107165521.9240-3-andrii@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>