[PATCH v18 5/8] ntdll: Validate parameters to NtCreateSection if large pages are requested.

[Vibhav Pant]

From: Vibhav Pant

If large pages are requested (SEC_LARGE_PAGES), return STATUS_INVALID_PARAMETER if:
* If the backing file object (file) is not NULL.
* The maximum size of the section is NULL.
* Large pages are not supported by the host platform.
* Large pages are supported, but the requested size is not a multiple of the minimum large page
  size.
---
 dlls/ntdll/unix/sync.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/dlls/ntdll/unix/sync.c b/dlls/ntdll/unix/sync.c
index 4b2d7c1ccbc..81931931d9c 100644
--- a/dlls/ntdll/unix/sync.c
+++ b/dlls/ntdll/unix/sync.c
@@ -2058,6 +2058,19 @@ NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJEC

*handle = 0;

+    if (sec_flags & SEC_LARGE_PAGES)
+    {
+        SIZE_T min_size = user_shared_data->LargePageMinimum;
+        if (file != NULL || size == NULL)
+        {
+            return STATUS_INVALID_PARAMETER;
+        }
+
+        if (min_size == 0 || size->QuadPart % min_size != 0)
+        {
+            return STATUS_INVALID_PARAMETER;
+        }
+    }
     switch (protect & 0xff)
     {
     case PAGE_READONLY: