[PATCH v4 6/9] NtCreateSection: Validate parameters if large pages are requested.

[Vibhav Pant]

From: Vibhav Pant

If the file mapping flags have SEC_LARGE_PAGES enabled, ensure that the mapping is anonymous and the
requested size is a multiple of the minimum large page size supported by the host platform.
---
 dlls/ntdll/unix/sync.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/dlls/ntdll/unix/sync.c b/dlls/ntdll/unix/sync.c
index e070233104b..3727ff28acb 100644
--- a/dlls/ntdll/unix/sync.c
+++ b/dlls/ntdll/unix/sync.c
@@ -2017,6 +2017,26 @@ NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJEC

*handle = 0;

+    if (sec_flags & SEC_LARGE_PAGES)
+    {
+        SIZE_T min_size;
+        NTSTATUS status;
+
+        if (file != NULL || size == NULL)
+        {
+            return STATUS_INVALID_PARAMETER;
+        }
+
+        status = virtual_get_min_large_page_size( &min_size );
+        if (status != STATUS_SUCCESS)
+        {
+            return status == STATUS_NOT_SUPPORTED ? STATUS_INVALID_PARAMETER : status;
+        }
+        if (size->QuadPart % min_size != 0)
+        {
+            return STATUS_INVALID_PARAMETER;
+        }
+    }
     switch (protect & 0xff)
     {
     case PAGE_READONLY: