From: Andrii Nakryiko <andriin@fb.com>
Date: Tue, 28 Apr 2020 18:21:06 -0700
Subject: selftests/bpf: Fix memory leak in extract_build_id()
Patch-mainline: v5.8-rc1
Git-commit: 9f56bb531a809ecaa7f0ddca61d2cf3adc1cb81a
References: bsc#1155518

getline() allocates string, which has to be freed.

Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200429012111.277390-7-andriin@fb.com
Acked-by: Gary Lin <glin@suse.com>
---
 tools/testing/selftests/bpf/test_progs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -258,6 +258,7 @@ int extract_build_id(char *build_id, siz
 		len = size;
 	memcpy(build_id, line, len);
 	build_id[len] = '\0';
+	free(line);
 	return 0;
 err:
 	fclose(fp);