From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Sun, 27 Jan 2019 07:11:23 +0000 (+0900)
Subject: [WIN32SS][NTGDI] Alignment probe change in NtGdiSetBitmapBits (#1309)
X-Git-Tag: 0.4.13-dev~579
X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=6b8f9c0c2b00e0fdec83b8fc99bf1b3a1d7b47f2;ds=sidebyside

[WIN32SS][NTGDI] Alignment probe change in NtGdiSetBitmapBits (#1309)

Don't check WORD alignment in NtGdiSetBitmapBits to match Win2k3 behaviour. CORE-15657
---

diff --git a/win32ss/gdi/ntgdi/bitmaps.c b/win32ss/gdi/ntgdi/bitmaps.c
index e003640e9ee..c98259967ef 100644
--- a/win32ss/gdi/ntgdi/bitmaps.c
+++ b/win32ss/gdi/ntgdi/bitmaps.c
@@ -642,7 +642,8 @@ NtGdiSetBitmapBits(
 
     _SEH2_TRY
     {
-        ProbeForRead(pUnsafeBits, Bytes, sizeof(WORD));
+        /* NOTE: Win2k3 doesn't check WORD alignment here. */
+        ProbeForRead(pUnsafeBits, Bytes, 1);
         ret = UnsafeSetBitmapBits(psurf, Bytes, pUnsafeBits);
     }
     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)