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[NTVDM]

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Fix the range check in VgaReadMemory and VgaWriteMemory.


svn path=/trunk/; revision=67238
This commit is contained in:
Aleksandar Andrejevic 2015-04-18 04:21:28 +00:00
parent bfd1c2a6b9
commit 6381155e6c
1 changed files with 2 additions and 2 deletions
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4
reactos/subsystems/mvdm/ntvdm/hardware/video/vga.c
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@ -1910,7 +1910,7 @@ VOID NTAPI VgaReadMemory(ULONG Address, PVOID Buffer, ULONG Size)
PUCHAR BufPtr = (PUCHAR)Buffer;
DPRINT("VgaReadMemory: Address 0x%08X, Size %lu\n", Address, Size);
Address = max(min(Address, VgaGetVideoLimitAddress() - 1), VgaGetVideoBaseAddress());
Address = min(max(Address, VgaGetVideoLimitAddress() - 1), VgaGetVideoBaseAddress());
Size = min(Size, VgaGetVideoLimitAddress() - Address + 1);
/* Ignore if video RAM access is disabled */
@ -1939,7 +1939,7 @@ BOOLEAN NTAPI VgaWriteMemory(ULONG Address, PVOID Buffer, ULONG Size)
PUCHAR BufPtr = (PUCHAR)Buffer;
DPRINT("VgaWriteMemory: Address 0x%08X, Size %lu\n", Address, Size);
Address = max(min(Address, VgaGetVideoLimitAddress() - 1), VgaGetVideoBaseAddress());
Address = min(max(Address, VgaGetVideoLimitAddress() - 1), VgaGetVideoBaseAddress());
Size = min(Size, VgaGetVideoLimitAddress() - Address + 1);
/* Ignore if video RAM access is disabled */