[PATCH] selftests/bpf: close the file descriptor to avoid resource leaks

[Malaya Kumar Rout]

Static Analyis for bench_htab_mem.c with cppcheck:error
tools/testing/selftests/bpf/benchs/bench_htab_mem.c:284:3:
error: Resource leak: fd [resourceLeak]
tools/testing/selftests/bpf/prog_tests/sk_assign.c:41:3:
error: Resource leak: tc [resourceLeak]

fix the issue  by closing the file descriptor (fd & tc) when
read & fgets operation fails.

Signed-off-by: Malaya Kumar Rout <malayarout91@xxxxxxxxx>
---
 tools/testing/selftests/bpf/benchs/bench_htab_mem.c | 1 +
 tools/testing/selftests/bpf/prog_tests/sk_assign.c  | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/benchs/bench_htab_mem.c b/tools/testing/selftests/bpf/benchs/bench_htab_mem.c
index 926ee822143e..59746fd2c23a 100644
--- a/tools/testing/selftests/bpf/benchs/bench_htab_mem.c
+++ b/tools/testing/selftests/bpf/benchs/bench_htab_mem.c
@@ -281,6 +281,7 @@ static void htab_mem_read_mem_cgrp_file(const char *name, unsigned long *value)
 	got = read(fd, buf, sizeof(buf) - 1);
 	if (got <= 0) {
 		*value = 0;
+		close(fd);
 		return;
 	}
 	buf[got] = 0;
diff --git a/tools/testing/selftests/bpf/prog_tests/sk_assign.c b/tools/testing/selftests/bpf/prog_tests/sk_assign.c
index 0b9bd1d6f7cc..10a0ab954b8a 100644
--- a/tools/testing/selftests/bpf/prog_tests/sk_assign.c
+++ b/tools/testing/selftests/bpf/prog_tests/sk_assign.c
@@ -37,8 +37,10 @@ configure_stack(void)
 	tc = popen("tc -V", "r");
 	if (CHECK_FAIL(!tc))
 		return false;
-	if (CHECK_FAIL(!fgets(tc_version, sizeof(tc_version), tc)))
+	if (CHECK_FAIL(!fgets(tc_version, sizeof(tc_version), tc))) {
+		pclose(tc);
 		return false;
+	}
 	if (strstr(tc_version, ", libbpf "))
 		prog = "test_sk_assign_libbpf.bpf.o";
 	else
-- 
2.43.0