[LTP] [PATCH v1] mseal02: Handle multiple errnos for 32-bit compat mode

[Wei Gao]

In 32-bit compat mode, the overflow_size (calculated using a 32-bit ULONG_MAX)
does not cause a 64-bit integer wrap-around when added to the start address.
Consequently, the kernel see valid range that points to unmapped space, returning
ENOMEM instead of the expected EINVAL.

Signed-off-by: Wei Gao <wegao@suse.com>
---
 testcases/kernel/syscalls/mseal/mseal02.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/testcases/kernel/syscalls/mseal/mseal02.c b/testcases/kernel/syscalls/mseal/mseal02.c
index e11d7dbf4..d941f6c40 100644
--- a/testcases/kernel/syscalls/mseal/mseal02.c
+++ b/testcases/kernel/syscalls/mseal/mseal02.c
@@ -21,6 +21,8 @@
 #include "tst_test.h"
 #include "lapi/syscalls.h"
 
+#define MAX_ERRNOS 5
+
 static void *start_addr, *unaligned_start_addr, *unallocated_start_addr, *unallocated_end_addr;
 static size_t page_size, twopages_size, fourpages_size, overflow_size;
 
@@ -28,22 +30,22 @@ static struct tcase {
 	void **addr;
 	size_t *len;
 	unsigned long flags;
-	int exp_err;
+	int exp_errs[MAX_ERRNOS];
 } tcases[] = {
-	{&start_addr, &page_size, ULONG_MAX, EINVAL},
-	{&unaligned_start_addr, &page_size, 0, EINVAL},
-	{&start_addr, &overflow_size, 0, EINVAL},
-	{&unallocated_start_addr, &twopages_size, 0, ENOMEM},
-	{&unallocated_end_addr, &twopages_size, 0, ENOMEM},
-	{&start_addr, &fourpages_size, 0, ENOMEM},
+	{&start_addr, &page_size, ULONG_MAX, {EINVAL}},
+	{&unaligned_start_addr, &page_size, 0, {EINVAL}},
+	{&start_addr, &overflow_size, 0, {EINVAL, ENOMEM}},
+	{&unallocated_start_addr, &twopages_size, 0, {ENOMEM}},
+	{&unallocated_end_addr, &twopages_size, 0, {ENOMEM}},
+	{&start_addr, &fourpages_size, 0, {ENOMEM}},
 };
 
 static void run(unsigned int n)
 {
 	struct tcase *tc = &tcases[n];
 
-	TST_EXP_FAIL(tst_syscall(__NR_mseal, *tc->addr, *tc->len, tc->flags), tc->exp_err,
-		"mseal(%p, %lu, %lu)", *tc->addr, *tc->len, tc->flags);
+	TST_EXP_FAIL2_ARR(tst_syscall(__NR_mseal, *tc->addr, *tc->len, tc->flags),
+		tc->exp_errs, MAX_ERRNOS, "mseal(%p, %lu, %lu)", *tc->addr, *tc->len, tc->flags);
 }
 
 static void setup(void)
-- 
2.52.0