Merge branch 'BPF selftests misc fixes'

Geliang Tang says:

====================
v2:
 - only check the first "link" (link_nl) in test_mixed_links().
 - Drop patch 2 in v1.

This patchset fixes a segfault and a bpf object leak in test_progs.

It is a resend patch 1 out of "skip ENOTSUPP BPF selftests" set as Eduard
suggested. Together with another fix for xdp_adjust_tail.
====================

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c

@@ -411,7 +411,8 @@ static void test_update_ca(void)
 		return;
 
 	link = bpf_map__attach_struct_ops(skel->maps.ca_update_1);
-	ASSERT_OK_PTR(link, "attach_struct_ops");
+	if (!ASSERT_OK_PTR(link, "attach_struct_ops"))
+		goto out;
 
 	do_test(&opts);
 	saved_ca1_cnt = skel->bss->ca1_cnt;
@@ -425,6 +426,7 @@ static void test_update_ca(void)
 	ASSERT_GT(skel->bss->ca2_cnt, 0, "ca2_ca2_cnt");
 
 	bpf_link__destroy(link);
+out:
 	tcp_ca_update__destroy(skel);
 }
 
@@ -447,7 +449,8 @@ static void test_update_wrong(void)
 		return;
 
 	link = bpf_map__attach_struct_ops(skel->maps.ca_update_1);
-	ASSERT_OK_PTR(link, "attach_struct_ops");
+	if (!ASSERT_OK_PTR(link, "attach_struct_ops"))
+		goto out;
 
 	do_test(&opts);
 	saved_ca1_cnt = skel->bss->ca1_cnt;
@@ -460,6 +463,7 @@ static void test_update_wrong(void)
 	ASSERT_GT(skel->bss->ca1_cnt, saved_ca1_cnt, "ca2_ca1_cnt");
 
 	bpf_link__destroy(link);
+out:
 	tcp_ca_update__destroy(skel);
 }
 
@@ -481,7 +485,8 @@ static void test_mixed_links(void)
 		return;
 
 	link_nl = bpf_map__attach_struct_ops(skel->maps.ca_no_link);
-	ASSERT_OK_PTR(link_nl, "attach_struct_ops_nl");
+	if (!ASSERT_OK_PTR(link_nl, "attach_struct_ops_nl"))
+		goto out;
 
 	link = bpf_map__attach_struct_ops(skel->maps.ca_update_1);
 	ASSERT_OK_PTR(link, "attach_struct_ops");
@@ -494,6 +499,7 @@ static void test_mixed_links(void)
 
 	bpf_link__destroy(link);
 	bpf_link__destroy(link_nl);
+out:
 	tcp_ca_update__destroy(skel);
 }
 
@@ -536,7 +542,8 @@ static void test_link_replace(void)
 	bpf_link__destroy(link);
 
 	link = bpf_map__attach_struct_ops(skel->maps.ca_update_2);
-	ASSERT_OK_PTR(link, "attach_struct_ops_2nd");
+	if (!ASSERT_OK_PTR(link, "attach_struct_ops_2nd"))
+		goto out;
 
 	/* BPF_F_REPLACE with a wrong old map Fd. It should fail!
 	 *
@@ -559,6 +566,7 @@ static void test_link_replace(void)
 
 	bpf_link__destroy(link);
 
+out:
 	tcp_ca_update__destroy(skel);
 }
 

tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c

@@ -222,7 +222,7 @@ static void test_xdp_adjust_frags_tail_grow(void)
 
 	prog = bpf_object__next_program(obj, NULL);
 	if (bpf_object__load(obj))
-		return;
+		goto out;
 
 	prog_fd = bpf_program__fd(prog);