Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-02-24 01:15:09 +00:00
Code Issues Projects Releases Packages Wiki Activity

- Add missing parameters probing.

Browse source 
svn path=/trunk/; revision=41203
This commit is contained in:
Aleksey Bragin 2009-05-30 10:57:31 +00:00
parent 145292bd14
commit 0a2ab85168
1 changed files with 20 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
reactos/ntoskrnl/mm/anonmem.c
View file

@ -949,12 +949,14 @@ NtFreeVirtualMemory(IN HANDLE ProcessHandle,
*/
{
MEMORY_AREA* MemoryArea;
NTSTATUS Status;
NTSTATUS Status = STATUS_SUCCESS;
PEPROCESS Process;
PMMSUPPORT AddressSpace;
PVOID BaseAddress;
ULONG RegionSize;
PAGED_CODE();
DPRINT("NtFreeVirtualMemory(ProcessHandle %x, *PBaseAddress %x, "
"*PRegionSize %x, FreeType %x)\n",ProcessHandle,*PBaseAddress,
*PRegionSize,FreeType);
@ -965,6 +967,23 @@ NtFreeVirtualMemory(IN HANDLE ProcessHandle,
return STATUS_INVALID_PARAMETER_4;
}
if(ExGetPreviousMode() != KernelMode)
{
_SEH2_TRY
{
/* Probe user pointers */
ProbeForWriteSize_t(PRegionSize);
ProbeForWritePointer(PBaseAddress);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Get exception code */
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
if (!NT_SUCCESS(Status)) return Status;
}
BaseAddress = (PVOID)PAGE_ROUND_DOWN((*PBaseAddress));
RegionSize = PAGE_ROUND_UP((ULONG_PTR)(*PBaseAddress) + (*PRegionSize)) -
PAGE_ROUND_DOWN((*PBaseAddress));