[PATCH 2/2] selftests/futex: Correct validation logic in waitv

[Wake Liu <wakel@google.com>]

In futex_waitv negative tests (invalid_flag, unaligned_address, etc.),
test results were previously evaluated as:
    if (res == EINVAL)

Since sys_futex_waitv returns -1 on error and sets errno, direct positive
comparisons against res are always false, causing tests to silently pass
regardless of real errors.

Correct these validations to assert EXPECT_EQ(res, -1) and compare errno
directly against expected constants.

Signed-off-by: Wake Liu <wakel@google.com>
---
 .../selftests/futex/functional/futex_waitv.c  | 45 +++++++++----------
 1 file changed, 20 insertions(+), 25 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/futex_waitv.c b/tools/testing/selftests/futex/functional/futex_waitv.c
index 7bed76a1caed..9dc0f9c1f22a 100644
--- a/tools/testing/selftests/futex/functional/futex_waitv.c
+++ b/tools/testing/selftests/futex/functional/futex_waitv.c
@@ -139,11 +139,10 @@ TEST(invalid_flag)
 	to.tv_sec++;
 
 	res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
-	if (res == EINVAL) {
-		EXPECT_TRUE(0) TH_LOG("futex_waitv private returned: %d %s",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-	}
+	EXPECT_EQ(res, -1) TH_LOG("futex_waitv returned unexpected result: %d", res);
+	if (res == -1)
+		EXPECT_EQ(errno, EINVAL)
+			TH_LOG("futex_waitv returned unexpected errno: %d", errno);
 }
 
 TEST(unaligned_address)
@@ -163,11 +162,10 @@ TEST(unaligned_address)
 	to.tv_sec++;
 
 	res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
-	if (res == EINVAL) {
-		EXPECT_TRUE(0) TH_LOG("futex_wake private returned: %d %s",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-	}
+	EXPECT_EQ(res, -1) TH_LOG("futex_waitv returned unexpected result: %d", res);
+	if (res == -1)
+		EXPECT_EQ(errno, EINVAL)
+			TH_LOG("futex_waitv returned unexpected errno: %d", errno);
 }
 
 TEST(null_address)
@@ -186,11 +184,10 @@ TEST(null_address)
 	to.tv_sec++;
 
 	res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
-	if (res == EINVAL) {
-		EXPECT_TRUE(0) TH_LOG("futex_waitv private returned: %d %s",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-	}
+	EXPECT_EQ(res, -1) TH_LOG("futex_waitv returned unexpected result: %d", res);
+	if (res == -1)
+		EXPECT_EQ(errno, EINVAL)
+			TH_LOG("futex_waitv returned unexpected errno: %d", errno);
 
 	/* Testing a NULL address for *waiters */
 	ASSERT_EQ(clock_gettime(CLOCK_MONOTONIC, &to), 0) TH_LOG("gettime64 failed");
@@ -198,11 +195,10 @@ TEST(null_address)
 	to.tv_sec++;
 
 	res = futex_waitv(NULL, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
-	if (res == EINVAL) {
-		EXPECT_TRUE(0) TH_LOG("futex_waitv private returned: %d %s",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-	}
+	EXPECT_EQ(res, -1) TH_LOG("futex_waitv returned unexpected result: %d", res);
+	if (res == -1)
+		EXPECT_EQ(errno, EINVAL)
+			TH_LOG("futex_waitv returned unexpected errno: %d", errno);
 }
 
 TEST(invalid_clockid)
@@ -219,11 +215,10 @@ TEST(invalid_clockid)
 	to.tv_sec++;
 
 	res = futex_waitv(NULL, NR_FUTEXES, 0, &to, CLOCK_TAI);
-	if (res == EINVAL) {
-		EXPECT_TRUE(0) TH_LOG("futex_waitv private returned: %d %s",
-				      res ? errno : res,
-				      res ? strerror(errno) : "");
-	}
+	EXPECT_EQ(res, -1) TH_LOG("futex_waitv returned unexpected result: %d", res);
+	if (res == -1)
+		EXPECT_EQ(errno, EINVAL)
+			TH_LOG("futex_waitv returned unexpected errno: %d", errno);
 }
 
 TEST_HARNESS_MAIN
-- 
2.54.0.746.g67dd491aae-goog