Fixed crash in UnMapLS for pointers not belonging to the segptr heap.

e77bdbb1 · Andreas Mohr · Alexandre Julliard · ea186796 · e77bdbb1
Commit e77bdbb1 authored Nov 30, 2000 by Andreas Mohr Committed by Alexandre Julliard Nov 30, 2000
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heap.c memory/heap.c +1 -1

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--- a/memory/heap.c
+++ b/memory/heap.c
@@ -908,7 +908,7 @@ void WINAPI UnMapLS( SEGPTR sptr )
    /* check if ptr is inside segptr heap */
    EnterCriticalSection( &segptrHeap->critSection );
    subheap = HEAP_FindSubHeap( segptrHeap, PTR_SEG_TO_LIN(sptr) );
-    if (subheap->selector != SELECTOROF(sptr)) subheap = NULL;
+    if ((subheap) && (subheap->selector != SELECTOROF(sptr))) subheap = NULL;
    LeaveCriticalSection( &segptrHeap->critSection );
    /* if not inside heap, free the selector */
    if (!subheap) FreeSelector16( SELECTOROF(sptr) );