[PATCH v3] ntoskrnl.exe: Add tests for METHOD_NEITHER ioctl behavior.

[Chip Davis]

Signed-off-by: Chip Davis 
---

Notes:
    v2: Send just the tests. Attempt to fix a broken test.
    v3: Remove broken test. I have no idea what Windows is doing here.

dlls/ntoskrnl.exe/tests/driver.c   | 30 ++++++++++++++++++++++++++++++
 dlls/ntoskrnl.exe/tests/driver.h   |  1 +
 dlls/ntoskrnl.exe/tests/ntoskrnl.c | 13 +++++++++++++
 3 files changed, 44 insertions(+)

diff --git a/dlls/ntoskrnl.exe/tests/driver.c b/dlls/ntoskrnl.exe/tests/driver.c
index a0f63ade791..6827b74a3c9 100644
--- a/dlls/ntoskrnl.exe/tests/driver.c
+++ b/dlls/ntoskrnl.exe/tests/driver.c
@@ -1855,6 +1855,34 @@ static NTSTATUS test_load_driver_ioctl(IRP *irp, IO_STACK_LOCATION *stack, ULONG
         return ZwUnloadDriver(&name);
 }

+static NTSTATUS test_mismatched_status_ioctl(IRP *irp, IO_STACK_LOCATION *stack, ULONG_PTR *info)
+{
+    ULONG length = stack->Parameters.DeviceIoControl.OutputBufferLength;
+    char *buffer = irp->UserBuffer;
+
+    if (!buffer)
+    {
+        irp->IoStatus.Status = STATUS_ACCESS_VIOLATION;
+        IoCompleteRequest(irp, IO_NO_INCREMENT);
+        return STATUS_ACCESS_VIOLATION;
+    }
+
+    if (length < sizeof(teststr))
+    {
+        irp->IoStatus.Status = STATUS_BUFFER_TOO_SMALL;
+        IoCompleteRequest(irp, IO_NO_INCREMENT);
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    memcpy(buffer, teststr, sizeof(teststr));
+
+    /* This is deliberate; some broken drivers do this */
+    *info = 0;
+    irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
+    IoCompleteRequest(irp, IO_NO_INCREMENT);
+    return STATUS_SUCCESS;
+}
+
 static NTSTATUS WINAPI driver_Create(DEVICE_OBJECT *device, IRP *irp)
 {
     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
@@ -1916,6 +1944,8 @@ static NTSTATUS WINAPI driver_IoControl(DEVICE_OBJECT *device, IRP *irp)
             IoDetachDevice(lower_device);
             status = STATUS_SUCCESS;
             break;
+        case IOCTL_WINETEST_MISMATCHED_STATUS:
+            return test_mismatched_status_ioctl(irp, stack, &irp->IoStatus.Information);
         default:
             break;
     }
diff --git a/dlls/ntoskrnl.exe/tests/driver.h b/dlls/ntoskrnl.exe/tests/driver.h
index 313d554a37b..aa9de674e2f 100644
--- a/dlls/ntoskrnl.exe/tests/driver.h
+++ b/dlls/ntoskrnl.exe/tests/driver.h
@@ -33,6 +33,7 @@
 #define IOCTL_WINETEST_GET_CLOSE_COUNT  CTL_CODE(FILE_DEVICE_UNKNOWN, 0x808, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define IOCTL_WINETEST_GET_FSCONTEXT    CTL_CODE(FILE_DEVICE_UNKNOWN, 0x809, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define IOCTL_WINETEST_RETURN_STATUS    CTL_CODE(FILE_DEVICE_UNKNOWN, 0x80a, METHOD_BUFFERED, FILE_ANY_ACCESS)
+#define IOCTL_WINETEST_MISMATCHED_STATUS CTL_CODE(FILE_DEVICE_UNKNOWN, 0x80b, METHOD_NEITHER, FILE_ANY_ACCESS)

static const char teststr[] = "Wine is not an emulator";

diff --git a/dlls/ntoskrnl.exe/tests/ntoskrnl.c b/dlls/ntoskrnl.exe/tests/ntoskrnl.c
index 76bcf0d0ce6..2535ed903e7 100644
--- a/dlls/ntoskrnl.exe/tests/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/tests/ntoskrnl.c
@@ -208,6 +208,18 @@ static void test_basic_ioctl(void)
     ok(!strcmp(buf, "Wine is no"), "got '%s'\n", buf);
 }

+static void test_mismatched_status_ioctl(void)
+{
+    DWORD written;
+    char buf[32];
+    BOOL res;
+
+    res = DeviceIoControl(device, IOCTL_WINETEST_MISMATCHED_STATUS, NULL, 0, buf,
+                          sizeof(buf), &written, NULL);
+    todo_wine ok(res, "DeviceIoControl failed: %u\n", GetLastError());
+    todo_wine ok(!strcmp(buf, teststr), "got '%s'\n", buf);
+}
+
 static void test_overlapped(void)
 {
     OVERLAPPED overlapped, overlapped2, *o;
@@ -514,6 +526,7 @@ START_TEST(ntoskrnl)
     ok(device != INVALID_HANDLE_VALUE, "failed to open device: %u\n", GetLastError());

test_basic_ioctl();
+    test_mismatched_status_ioctl();
     main_test();
     test_overlapped();
     test_load_driver(service2);