netdev - [PATCH bpf] selftests/bpf: fix error return code in run_getsockopt

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Date:   Mon, 16 Nov 2020 18:16:33 +0800
From:   Wang Hai <wanghai38@...wei.com>
To:     <shuah@...nel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
        <kafai@...com>, <songliubraving@...com>, <yhs@...com>,
        <andrii@...nel.org>, <john.fastabend@...il.com>,
        <kpsingh@...omium.org>, <sdf@...gle.com>
CC:     <linux-kselftest@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH bpf] selftests/bpf: fix error return code in run_getsockopt_test()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 65b4414a05eb ("selftests/bpf: add sockopt test that exercises BPF_F_ALLOW_MULTI")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
---
 tools/testing/selftests/bpf/prog_tests/sockopt_multi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c b/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c
index 29188d6f5c8d..51fac975b316 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c
@@ -138,7 +138,8 @@ static int run_getsockopt_test(struct bpf_object *obj, int cg_parent,
 	 */
 
 	buf = 0x40;
-	if (setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1) < 0) {
+	err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1);
+	if (err < 0) {
 		log_err("Failed to call setsockopt(IP_TOS)");
 		goto detach;
 	}
-- 
2.17.1