ntdll: Add check for null pointer in NtQuerySystemInformation(SystemModuleInformation).

68a61821 · Alexandre Julliard · cf7cfa85 · 68a61821
Commit 68a61821 authored Jul 04, 2007 by Alexandre Julliard
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nt.c dlls/ntdll/nt.c +2 -1

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--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -845,7 +845,8 @@ NTSTATUS WINAPI NtQuerySystemInformation(
        break;
    case SystemModuleInformation:
        /* FIXME: should be system-wide */
-        ret = LdrQueryProcessModuleInformation( SystemInformation, Length, &len );
+        if (!SystemInformation) ret = STATUS_ACCESS_VIOLATION;
+        else ret = LdrQueryProcessModuleInformation( SystemInformation, Length, &len );
        break;
    case SystemHandleInformation:
        {