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[NTVDM]
[reactos.git]
/
reactos
/
subsystems
/
mvdm
/
ntvdm
/
dos
/
dos32krnl
/
memory.c
diff --git
a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/memory.c
b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/memory.c
index
73a554d
..
892bbbd
100644
(file)
--- a/
reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/memory.c
+++ b/
reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/memory.c
@@
-319,6
+319,7
@@
BOOLEAN DosFreeMemory(WORD BlockData)
PDOS_MCB Mcb = SEGMENT_TO_MCB(BlockData - 1);
DPRINT("DosFreeMemory: BlockData 0x%04X\n", BlockData);
+ if (BlockData == 0) return FALSE;
/* Make sure the MCB is valid */
if (Mcb->BlockType != 'M' && Mcb->BlockType != 'Z')