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[ Upstream commit6d2e21dc4d] The get_syms() function in kprobe_multi_test.c does not free the string memory allocated by sscanf correctly. Fix it. Fixes:5b6c7e5c44("selftests/bpf: Add attach bench test") Signed-off-by: Xu Kuohai <xukuohai@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/bpf/20221011120108.782373-5-xukuohai@huaweicloud.com Signed-off-by: Sasha Levin <sashal@kernel.org>