[PATCH v2] ntdll: Avoid reqeuests with null pointer but invalid size.

[Bernhard Übelacker]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51770
Signed-off-by: Bernhard Übelacker <bernhardu at mailbox.org>
---
v1: https://www.winehq.org/pipermail/wine-devel/2021-December/202913.html
    https://www.winehq.org/pipermail/wine-devel/2022-April/213866.html
v2: Validate pointer before calling wine_server_add_data.
---
 dlls/kernel32/tests/volume.c | 16 ++++++++++++++++
 dlls/ntdll/unix/file.c       |  4 +++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/dlls/kernel32/tests/volume.c b/dlls/kernel32/tests/volume.c
index 9166cf228d9..4bee4207a37 100644
--- a/dlls/kernel32/tests/volume.c
+++ b/dlls/kernel32/tests/volume.c
@@ -618,6 +618,7 @@ static void test_disk_query_property(void)
     STORAGE_PROPERTY_QUERY query = {0};
     STORAGE_DESCRIPTOR_HEADER header = {0};
     STORAGE_DEVICE_DESCRIPTOR descriptor = {0};
+    STORAGE_DEVICE_NUMBER device_number = {0};
     HANDLE handle;
     DWORD error;
     DWORD size;
@@ -654,6 +655,21 @@ static void test_disk_query_property(void)
     ok(descriptor.Version == sizeof(descriptor), "got descriptor.Version %ld\n", descriptor.Version);
     ok(descriptor.Size >= sizeof(descriptor), "got descriptor.Size %ld\n", descriptor.Size);
 
+    SetLastError(0xdeadbeef);
+    ret = DeviceIoControl(handle, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &device_number, sizeof(device_number), &size, NULL);
+    error = GetLastError();
+    ok(ret, "expect ret %#x, got %#x\n", TRUE, ret);
+    ok(error == 0xdeadbeef, "expect err %#x, got err %#x\n", 0xdeadbeef, error);
+    ok(size == sizeof(device_number), "got size %d\n", size);
+
+    /* unclean call with valid in_buffer=NULL but incorrect in_size=4 */
+    SetLastError(0xdeadbeef);
+    ret = DeviceIoControl(handle, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 4, &device_number, sizeof(device_number), &size, NULL);
+    error = GetLastError();
+    ok(ret, "expect ret %#x, got %#x\n", TRUE, ret);
+    ok(error == 0xdeadbeef, "expect err %#x, got err %#x\n", 0xdeadbeef, error);
+    ok(size == sizeof(device_number), "got size %d\n", size);
+
     CloseHandle(handle);
 }
 
diff --git a/dlls/ntdll/unix/file.c b/dlls/ntdll/unix/file.c
index cc8bf0c6e82..92b67280500 100644
--- a/dlls/ntdll/unix/file.c
+++ b/dlls/ntdll/unix/file.c
@@ -4893,7 +4893,7 @@ static NTSTATUS server_ioctl_file( HANDLE handle, HANDLE event,
     {
         req->code        = code;
         req->async       = server_async( handle, &async->io, event, apc, apc_context, iosb_client_ptr(io) );
-        wine_server_add_data( req, in_buffer, in_size );
+        if (in_buffer) wine_server_add_data( req, in_buffer, in_size );
         if ((code & 3) != METHOD_BUFFERED) wine_server_add_data( req, out_buffer, out_size );
         wine_server_set_reply( req, out_buffer, out_size );
         status = virtual_locked_server_call( req );
@@ -4913,6 +4913,8 @@ static NTSTATUS server_ioctl_file( HANDLE handle, HANDLE event,
 
     if (status != STATUS_PENDING) free( async );
 
+    if (wait_handle && status == STATUS_ACCESS_VIOLATION)
+        ERR("Sending request failed but wait requested. Expect the application to hang.\n");
     if (wait_handle) status = wait_async( wait_handle, (options & FILE_SYNCHRONOUS_IO_ALERT) );
     return status;
 }
-- 
2.35.1