static __inline int xmemcheck(ROSRGNDATA *reg, PRECT *rect, PRECT *firstrect ) {
if ( (reg->rdh.nCount+1)*sizeof( RECT ) >= reg->rdh.nRgnSize ) {
PRECT temp;
- temp = ExAllocatePoolWithTag( PagedPool, (2 * (reg->rdh.nRgnSize)), TAG_REGION);
+ DWORD NewSize = 2 * reg->rdh.nRgnSize;
+ if (NewSize < (reg->rdh.nCount + 1) * sizeof(RECT)) {
+ NewSize = (reg->rdh.nCount + 1) * sizeof(RECT);
+ }
+ temp = ExAllocatePoolWithTag( PagedPool, NewSize, TAG_REGION);
if (temp == 0)
return 0;
/* copy the rectangles */
COPY_RECTS(temp, *firstrect, reg->rdh.nCount);
- reg->rdh.nRgnSize *= 2;
+ reg->rdh.nRgnSize = NewSize;
if (*firstrect != ®->rdh.rcBound)
ExFreePool( *firstrect );
*firstrect = temp;