diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-10-03 16:26:06 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-10-10 14:25:30 -0700 |
| commit | 505f5224b197b77169c977e747cbc18b222f85f9 (patch) | |
| tree | c08b20b19f40e55e9de015cac08446a8b5c726a9 /tools | |
| parent | 19942d4fd9cf022b28a9afb432a6338dcf96fc2f (diff) | |
KVM: selftests: Verify that reads to inaccessible guest_memfd VMAs SIGBUS
Expand the guest_memfd negative testcases for overflow and MAP_PRIVATE to
verify that reads to inaccessible memory also get a SIGBUS.
Reviewed-by: Ackerley Tng <ackerleytng@google.com>
Tested-by: Ackerley Tng <ackerleytng@google.com>
Reviewed-by: Lisa Wang <wyihan@google.com>
Tested-by: Lisa Wang <wyihan@google.com>
Link: https://lore.kernel.org/r/20251003232606.4070510-14-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/guest_memfd_test.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c index f5372fdf096d..e7d9aeb418d3 100644 --- a/tools/testing/selftests/kvm/guest_memfd_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_test.c @@ -84,6 +84,7 @@ static void test_fault_sigbus(int fd, size_t accessible_size, size_t map_size) mem = kvm_mmap(map_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd); TEST_EXPECT_SIGBUS(memset(mem, val, map_size)); + TEST_EXPECT_SIGBUS((void)READ_ONCE(mem[accessible_size])); for (i = 0; i < accessible_size; i++) TEST_ASSERT_EQ(READ_ONCE(mem[i]), val); |