From 2951dddef0a87c20e83c77070bd5077290d9121f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Andr=C3=A9=20Almeida?= Date: Mon, 15 Sep 2025 23:26:29 +0200 Subject: [PATCH] selftest/futex: Reintroduce "Memory out of range" numa_mpol's subtest MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Commit d8e2f919997 ("selftests/futex: Fix some futex_numa_mpol subtests") removed the "Memory out of range" subtest due to it being dependent on the memory layout of the test process having an invalid memory address just after the `*futex_ptr` allocated memory. Reintroduce this test and make it deterministic, by allocation two memory pages and marking the second one with PROT_NONE. Signed-off-by: André Almeida Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Waiman Long --- .../testing/selftests/futex/functional/futex_numa_mpol.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/futex/functional/futex_numa_mpol.c b/tools/testing/selftests/futex/functional/futex_numa_mpol.c index dd7b05e8cda45..5f4e3111269c3 100644 --- a/tools/testing/selftests/futex/functional/futex_numa_mpol.c +++ b/tools/testing/selftests/futex/functional/futex_numa_mpol.c @@ -174,10 +174,13 @@ int main(int argc, char *argv[]) ksft_set_plan(1); mem_size = sysconf(_SC_PAGE_SIZE); - futex_ptr = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + futex_ptr = mmap(NULL, mem_size * 2, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); if (futex_ptr == MAP_FAILED) ksft_exit_fail_msg("mmap() for %d bytes failed\n", mem_size); + /* Create an invalid memory region for the "Memory out of range" test */ + mprotect(futex_ptr + mem_size, mem_size, PROT_NONE); + futex_numa = futex_ptr; ksft_print_msg("Regular test\n"); @@ -192,6 +195,9 @@ int main(int argc, char *argv[]) ksft_print_msg("Mis-aligned futex\n"); test_futex(futex_ptr + mem_size - 4, EINVAL); + ksft_print_msg("Memory out of range\n"); + test_futex(futex_ptr + mem_size, EFAULT); + futex_numa->numa = FUTEX_NO_NODE; mprotect(futex_ptr, mem_size, PROT_READ); ksft_print_msg("Memory, RO\n"); -- 2.47.3