[ros-diffs] [reactos] 01/01: [WIN32SS][NTGDI] Alignment probe change in NtGdiSetBitmapBits (#1309)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=6b8f9c0c2b00e0fdec83b…

commit 6b8f9c0c2b00e0fdec83b8fc99bf1b3a1d7b47f2
Author:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
AuthorDate: Sun Jan 27 16:11:23 2019 +0900
Commit:     GitHub <noreply(a)github.com>
CommitDate: Sun Jan 27 16:11:23 2019 +0900

    [WIN32SS][NTGDI] Alignment probe change in NtGdiSetBitmapBits (#1309)
    
    Don't check WORD alignment in NtGdiSetBitmapBits to match Win2k3 behaviour.
CORE-15657
---
 win32ss/gdi/ntgdi/bitmaps.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/win32ss/gdi/ntgdi/bitmaps.c b/win32ss/gdi/ntgdi/bitmaps.c
index e003640e9e..c98259967e 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)