Merge tag 'linux_kselftest-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - make framework and tests reporting KTAP compliant

 - make ktap_helpers and power_supply test POSIX compliant

 - add ksft_exit_fail_perror() to include errono in string form

 - avoid clang reporting false positive static analysis errors about
   functions that exit and never return. ksft_exit* functions are marked
   __noreturn to address this problem

 - add mechanism for reporting a KSFT_ result code

 - fix build warnings related missing headers and unused variables

 - fix clang build failures

 - cleanups to resctrl test

 - add host arch for LLVM builds

* tag 'linux_kselftest-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (44 commits)
  selftests/sgx: Include KHDR_INCLUDES in Makefile
  selftests: Compile kselftest headers with -D_GNU_SOURCE
  selftests/resctrl: fix clang build warnings related to abs(), labs() calls
  selftests/ftrace: Fix checkbashisms errors
  selftests/ftrace: Fix BTFARG testcase to check fprobe is enabled correctly
  selftests/capabilities: fix warn_unused_result build warnings
  selftests: filesystems: add missing stddef header
  selftests: kselftest_deps: fix l5_test() empty variable
  selftests: default to host arch for LLVM builds
  selftests/resctrl: fix clang build failure: use LOCAL_HDRS
  selftests/binderfs: use the Makefile's rules, not Make's implicit rules
  Documentation: kselftest: fix codeblock
  selftests: kselftest: Make ksft_exit functions return void instead of int
  selftests: x86: ksft_exit_pass() does not return
  selftests: timers: ksft_exit functions do not return
  selftests: sync: ksft_exit_pass() does not return
  selftests/resctrl: ksft_exit_skip() does not return
  selftests: pidfd: ksft_exit functions do not return
  selftests/mm: ksft_exit functions do not return
  selftests: membarrier: ksft_exit_pass() does not return
  ...

71 files changed, 702 insertions, 674 deletions

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index e1504833654d..ed012a7f0786 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
   # $(realpath ...) resolves symlinks
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
index 7cde07a5df78..47bad7ddc5bc 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -82,7 +82,7 @@ static bool create_and_enter_ns(uid_t inner_uid)
 {
 	uid_t outer_uid;
 	gid_t outer_gid;
-	int i;
+	int i, ret;
 	bool have_outer_privilege;
 
 	outer_uid = getuid();
@@ -97,7 +97,10 @@ static bool create_and_enter_ns(uid_t inner_uid)
 			ksft_exit_fail_msg("setresuid - %s\n", strerror(errno));
 
 		// Re-enable effective caps
-		capng_get_caps_process();
+		ret = capng_get_caps_process();
+		if (ret == -1)
+			ksft_exit_fail_msg("capng_get_caps_process failed\n");
+
 		for (i = 0; i < CAP_LAST_CAP; i++)
 			if (capng_have_capability(CAPNG_PERMITTED, i))
 				capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, i);
@@ -207,6 +210,7 @@ static void exec_validate_cap(bool eff, bool perm, bool inh, bool ambient)
 
 static int do_tests(int uid, const char *our_path)
 {
+	int ret;
 	bool have_outer_privilege = create_and_enter_ns(uid);
 
 	int ourpath_fd = open(our_path, O_RDONLY | O_DIRECTORY);
@@ -250,7 +254,9 @@ static int do_tests(int uid, const char *our_path)
 			ksft_exit_fail_msg("chmod - %s\n", strerror(errno));
 	}
 
-	capng_get_caps_process();
+	ret = capng_get_caps_process();
+	if (ret == -1)
+		ksft_exit_fail_msg("capng_get_caps_process failed\n");
 
 	/* Make sure that i starts out clear */
 	capng_update(CAPNG_DROP, CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE);
diff --git a/tools/testing/selftests/capabilities/validate_cap.c b/tools/testing/selftests/capabilities/validate_cap.c
index 60b4e7b716a7..65f2a1c89239 100644
--- a/tools/testing/selftests/capabilities/validate_cap.c
+++ b/tools/testing/selftests/capabilities/validate_cap.c
@@ -28,6 +28,7 @@ static bool bool_arg(char **argv, int i)
 int main(int argc, char **argv)
 {
 	const char *atsec = "";
+	int ret;
 
 	/*
 	 * Be careful just in case a setgid or setcapped copy of this
@@ -44,7 +45,11 @@ int main(int argc, char **argv)
 		atsec = " (AT_SECURE is not set)";
 #endif
 
-	capng_get_caps_process();
+	ret = capng_get_caps_process();
+	if (ret == -1) {
+		ksft_print_msg("capng_get_caps_process failed\n");
+		return 1;
+	}
 
 	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
 		ksft_print_msg("Wrong effective state%s\n", atsec);
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 3c9bf0cd82a8..e61f07973ce5 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -95,9 +95,14 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 			getpid(), pid);
 
 	if (waitpid(-1, &status, __WALL) < 0) {
-		ksft_print_msg("Child returned %s\n", strerror(errno));
+		ksft_print_msg("waitpid() returned %s\n", strerror(errno));
 		return -errno;
 	}
+	if (!WIFEXITED(status)) {
+		ksft_print_msg("Child did not exit normally, status 0x%x\n",
+			       status);
+		return EXIT_FAILURE;
+	}
 	if (WEXITSTATUS(status))
 		return WEXITSTATUS(status);
 
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 54a8b2445be9..ce0426786828 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -120,5 +120,5 @@ int main(int argc, char **argv)
 
 	test_clone3_clear_sighand();
 
-	return ksft_exit_pass();
+	ksft_exit_pass();
 }
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index ed785afb6077..bfb0da2b4fdd 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -114,7 +114,8 @@ static int call_clone3_set_tid(pid_t *set_tid,
 	return WEXITSTATUS(status);
 }
 
-static void test_clone3_set_tid(pid_t *set_tid,
+static void test_clone3_set_tid(const char *desc,
+				pid_t *set_tid,
 				size_t set_tid_size,
 				int flags,
 				int expected,
@@ -129,17 +130,13 @@ static void test_clone3_set_tid(pid_t *set_tid,
 	ret = call_clone3_set_tid(set_tid, set_tid_size, flags, expected_pid,
 				  wait_for_it);
 	ksft_print_msg(
-		"[%d] clone3() with CLONE_SET_TID %d says :%d - expected %d\n",
+		"[%d] clone3() with CLONE_SET_TID %d says: %d - expected %d\n",
 		getpid(), set_tid[0], ret, expected);
-	if (ret != expected)
-		ksft_test_result_fail(
-			"[%d] Result (%d) is different than expected (%d)\n",
-			getpid(), ret, expected);
-	else
-		ksft_test_result_pass(
-			"[%d] Result (%d) matches expectation (%d)\n",
-			getpid(), ret, expected);
+
+	ksft_test_result(ret == expected, "%s with %zu TIDs and flags 0x%x\n",
+			 desc, set_tid_size, flags);
 }
+
 int main(int argc, char *argv[])
 {
 	FILE *f;
@@ -172,73 +169,91 @@ int main(int argc, char *argv[])
 
 	/* Try invalid settings */
 	memset(&set_tid, 0, sizeof(set_tid));
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL + 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, 0 TID",
+			    set_tid, MAX_PID_NS_LEVEL + 1, 0, -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 2, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, 0 TID",
+			    set_tid, MAX_PID_NS_LEVEL * 2, 0, -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 2 + 1, 0,
-			-EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, 0 TID",
+			    set_tid, MAX_PID_NS_LEVEL * 2 + 1, 0,
+			    -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 42, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, 0 TID",
+			    set_tid, MAX_PID_NS_LEVEL * 42, 0, -EINVAL, 0, 0);
 
 	/*
 	 * This can actually work if this test running in a MAX_PID_NS_LEVEL - 1
 	 * nested PID namespace.
 	 */
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL - 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, 0 TID",
+			    set_tid, MAX_PID_NS_LEVEL - 1, 0, -EINVAL, 0, 0);
 
 	memset(&set_tid, 0xff, sizeof(set_tid));
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL + 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, TID all 1s",
+			    set_tid, MAX_PID_NS_LEVEL + 1, 0, -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 2, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, TID all 1s",
+			    set_tid, MAX_PID_NS_LEVEL * 2, 0, -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 2 + 1, 0,
-			-EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, TID all 1s",
+			    set_tid, MAX_PID_NS_LEVEL * 2 + 1, 0,
+			    -EINVAL, 0, 0);
 
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL * 42, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, TID all 1s",
+			    set_tid, MAX_PID_NS_LEVEL * 42, 0, -EINVAL, 0, 0);
 
 	/*
 	 * This can actually work if this test running in a MAX_PID_NS_LEVEL - 1
 	 * nested PID namespace.
 	 */
-	test_clone3_set_tid(set_tid, MAX_PID_NS_LEVEL - 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("invalid size, TID all 1s",
+			    set_tid, MAX_PID_NS_LEVEL - 1, 0, -EINVAL, 0, 0);
 
 	memset(&set_tid, 0, sizeof(set_tid));
 	/* Try with an invalid PID */
 	set_tid[0] = 0;
-	test_clone3_set_tid(set_tid, 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("valid size, 0 TID",
+			    set_tid, 1, 0, -EINVAL, 0, 0);
 
 	set_tid[0] = -1;
-	test_clone3_set_tid(set_tid, 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("valid size, -1 TID",
+			    set_tid, 1, 0, -EINVAL, 0, 0);
 
 	/* Claim that the set_tid array actually contains 2 elements. */
-	test_clone3_set_tid(set_tid, 2, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("2 TIDs, -1 and 0",
+			    set_tid, 2, 0, -EINVAL, 0, 0);
 
 	/* Try it in a new PID namespace */
 	if (uid == 0)
-		test_clone3_set_tid(set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
+		test_clone3_set_tid("valid size, -1 TID",
+				    set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
 	else
 		ksft_test_result_skip("Clone3() with set_tid requires root\n");
 
 	/* Try with a valid PID (1) this should return -EEXIST. */
 	set_tid[0] = 1;
 	if (uid == 0)
-		test_clone3_set_tid(set_tid, 1, 0, -EEXIST, 0, 0);
+		test_clone3_set_tid("duplicate PID 1",
+				    set_tid, 1, 0, -EEXIST, 0, 0);
 	else
 		ksft_test_result_skip("Clone3() with set_tid requires root\n");
 
 	/* Try it in a new PID namespace */
 	if (uid == 0)
-		test_clone3_set_tid(set_tid, 1, CLONE_NEWPID, 0, 0, 0);
+		test_clone3_set_tid("duplicate PID 1",
+				    set_tid, 1, CLONE_NEWPID, 0, 0, 0);
 	else
 		ksft_test_result_skip("Clone3() with set_tid requires root\n");
 
 	/* pid_max should fail everywhere */
 	set_tid[0] = pid_max;
-	test_clone3_set_tid(set_tid, 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("set TID to maximum",
+			    set_tid, 1, 0, -EINVAL, 0, 0);
 
 	if (uid == 0)
-		test_clone3_set_tid(set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
+		test_clone3_set_tid("set TID to maximum",
+				    set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
 	else
 		ksft_test_result_skip("Clone3() with set_tid requires root\n");
 
@@ -262,10 +277,12 @@ int main(int argc, char *argv[])
 
 	/* After the child has finished, its PID should be free. */
 	set_tid[0] = pid;
-	test_clone3_set_tid(set_tid, 1, 0, 0, 0, 0);
+	test_clone3_set_tid("reallocate child TID",
+			    set_tid, 1, 0, 0, 0, 0);
 
 	/* This should fail as there is no PID 1 in that namespace */
-	test_clone3_set_tid(set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
+	test_clone3_set_tid("duplicate child TID",
+			    set_tid, 1, CLONE_NEWPID, -EINVAL, 0, 0);
 
 	/*
 	 * Creating a process with PID 1 in the newly created most nested
@@ -274,7 +291,8 @@ int main(int argc, char *argv[])
 	 */
 	set_tid[0] = 1;
 	set_tid[1] = pid;
-	test_clone3_set_tid(set_tid, 2, CLONE_NEWPID, 0, pid, 0);
+	test_clone3_set_tid("create PID 1 in new NS",
+			    set_tid, 2, CLONE_NEWPID, 0, pid, 0);
 
 	ksft_print_msg("unshare PID namespace\n");
 	if (unshare(CLONE_NEWPID) == -1)
@@ -284,7 +302,8 @@ int main(int argc, char *argv[])
 	set_tid[0] = pid;
 
 	/* This should fail as there is no PID 1 in that namespace */
-	test_clone3_set_tid(set_tid, 1, 0, -EINVAL, 0, 0);
+	test_clone3_set_tid("duplicate PID 1",
+			    set_tid, 1, 0, -EINVAL, 0, 0);
 
 	/* Let's create a PID 1 */
 	ns_pid = fork();
@@ -295,21 +314,25 @@ int main(int argc, char *argv[])
 		 */
 		set_tid[0] = 43;
 		set_tid[1] = -1;
-		test_clone3_set_tid(set_tid, 2, 0, -EINVAL, 0, 0);
+		test_clone3_set_tid("check leak on invalid TID -1",
+				    set_tid, 2, 0, -EINVAL, 0, 0);
 
 		set_tid[0] = 43;
 		set_tid[1] = pid;
-		test_clone3_set_tid(set_tid, 2, 0, 0, 43, 0);
+		test_clone3_set_tid("check leak on invalid specific TID",
+				    set_tid, 2, 0, 0, 43, 0);
 
 		ksft_print_msg("Child in PID namespace has PID %d\n", getpid());
 		set_tid[0] = 2;
-		test_clone3_set_tid(set_tid, 1, 0, 0, 2, 0);
+		test_clone3_set_tid("create PID 2 in child NS",
+				    set_tid, 1, 0, 0, 2, 0);
 
 		set_tid[0] = 1;
 		set_tid[1] = -1;
 		set_tid[2] = pid;
 		/* This should fail as there is invalid PID at level '1'. */
-		test_clone3_set_tid(set_tid, 3, CLONE_NEWPID, -EINVAL, 0, 0);
+		test_clone3_set_tid("fail due to invalid TID at level 1",
+				    set_tid, 3, CLONE_NEWPID, -EINVAL, 0, 0);
 
 		set_tid[0] = 1;
 		set_tid[1] = 42;
@@ -319,13 +342,15 @@ int main(int argc, char *argv[])
 		 * namespaces. Again assuming this is running in the host's
 		 * PID namespace. Not yet nested.
 		 */
-		test_clone3_set_tid(set_tid, 4, CLONE_NEWPID, -EINVAL, 0, 0);
+		test_clone3_set_tid("fail due to too few active PID NSs",
+				    set_tid, 4, CLONE_NEWPID, -EINVAL, 0, 0);
 
 		/*
 		 * This should work and from the parent we should see
 		 * something like 'NSpid:	pid	42	1'.
 		 */
-		test_clone3_set_tid(set_tid, 3, CLONE_NEWPID, 0, 42, true);
+		test_clone3_set_tid("verify that we have 3 PID NSs",
+				    set_tid, 3, CLONE_NEWPID, 0, 42, true);
 
 		child_exit(ksft_cnt.ksft_fail);
 	}
@@ -380,16 +405,14 @@ int main(int argc, char *argv[])
 	ksft_cnt.ksft_pass += 6 - (ksft_cnt.ksft_fail - WEXITSTATUS(status));
 	ksft_cnt.ksft_fail = WEXITSTATUS(status);
 
-	if (ns3 == pid && ns2 == 42 && ns1 == 1)
-		ksft_test_result_pass(
-			"PIDs in all namespaces as expected (%d,%d,%d)\n",
-			ns3, ns2, ns1);
-	else
-		ksft_test_result_fail(
-			"PIDs in all namespaces not as expected (%d,%d,%d)\n",
-			ns3, ns2, ns1);
+	ksft_print_msg("Expecting PIDs %d, 42, 1\n", pid);
+	ksft_print_msg("Have PIDs in namespaces: %d, %d, %d\n", ns3, ns2, ns1);
+	ksft_test_result(ns3 == pid && ns2 == 42 && ns1 == 1,
+			 "PIDs in all namespaces as expected\n");
 out:
 	ret = 0;
 
-	return !ret ? ksft_exit_pass() : ksft_exit_fail();
+	if (ret)
+		ksft_exit_fail();
+	ksft_exit_pass();
 }
diff --git a/tools/testing/selftests/cpufreq/cpufreq.sh b/tools/testing/selftests/cpufreq/cpufreq.sh
index b583a2fb4504..a8b1dbc0a3a5 100755
--- a/tools/testing/selftests/cpufreq/cpufreq.sh
+++ b/tools/testing/selftests/cpufreq/cpufreq.sh
@@ -178,8 +178,7 @@ cpufreq_basic_tests()
 
 	count=$(count_cpufreq_managed_cpus)
 	if [ $count = 0 ]; then
-		printf "No cpu is