More parameter checking in RltCopySid.

c595083f · Juergen Schmied · Alexandre Julliard · 4a84dc23 · c595083f
Commit c595083f authored Oct 23, 1998 by Juergen Schmied Committed by Alexandre Julliard Oct 23, 1998
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ntdll.c misc/ntdll.c +2 -1

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--- a/misc/ntdll.c
+++ b/misc/ntdll.c
@@ -254,7 +254,8 @@ LPBYTE WINAPI RtlSubAuthorityCountSid(LPSID lpsid)
 *                 RtlCopySid				[NTDLL.302]
 */
 DWORD WINAPI RtlCopySid(DWORD len,LPSID to,LPSID from)
-{
+{	if (!from)
+		return 0;
 	if (len<(from->SubAuthorityCount*4+8))
 		return STATUS_BUFFER_TOO_SMALL;
 	memmove(to,from,from->SubAuthorityCount*4+8);