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

Wei Gao via ltp
2026-01-28T00:28:58Z

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