The requested resources should be closed before return in main(), otherwise resource leak will occur. Add a check of cg_fd before close().

Fixes: 1f5fa9ab6e2e ("selftests/bpf: Test BPF_CGROUP_SYSCTL") Signed-off-by: Ma Ke make24@iscas.ac.cn --- tools/testing/selftests/bpf/test_sysctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_sysctl.c b/tools/testing/selftests/bpf/test_sysctl.c index bcdbd27f22f0..242246ba8d1e 100644 --- a/tools/testing/selftests/bpf/test_sysctl.c +++ b/tools/testing/selftests/bpf/test_sysctl.c @@ -1627,7 +1627,8 @@ int main(int argc, char **argv) err: err = -1; out: - close(cgfd); + if (cgfd >= 0) + close(cgfd); cleanup_cgroup_environment(); return err; }