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Patch, as suggested by Mike Nordell, to verify IRQL before calling unsafe fast mutex functions

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svn path=/trunk/; revision=6319
This commit is contained in:
Vizzini 2003-10-15 03:09:23 +00:00
parent e570a920e4
commit 1472d11a1f
1 changed files with 23 additions and 1 deletions
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24
reactos/subsys/win32k/objects/gdiobj.c
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@ -19,7 +19,7 @@
/*
* GDIOBJ.C - GDI object manipulation routines
*
* $Id: gdiobj.c,v 1.45 2003/10/04 21:09:29 gvg Exp $
* $Id: gdiobj.c,v 1.46 2003/10/15 03:09:23 vizzini Exp $
*
*/
@ -154,6 +154,14 @@ static PGDI_HANDLE_TABLE FASTCALL
GDIOBJ_iAllocHandleTable (WORD Size)
{
PGDI_HANDLE_TABLE handleTable;
KIRQL OldIrql;
BOOLEAN IrqlRaised = FALSE;
if(KeGetCurrentIrql() < APC_LEVEL)
{
KeRaiseIrql(APC_LEVEL, &OldIrql);
IrqlRaised = TRUE;
}
ExAcquireFastMutexUnsafe (&HandleTableMutex);
handleTable = ExAllocatePool(PagedPool,
@ -166,6 +174,9 @@ GDIOBJ_iAllocHandleTable (WORD Size)
handleTable->wTableSize = Size;
ExReleaseFastMutexUnsafe (&HandleTableMutex);
if(IrqlRaised)
KeLowerIrql(OldIrql);
return handleTable;
}
@ -192,6 +203,14 @@ static WORD FASTCALL
GDIOBJ_iGetNextOpenHandleIndex (void)
{
WORD tableIndex;
BOOLEAN IrqlRaised = FALSE;
KIRQL OldIrql;
if(KeGetCurrentIrql() < APC_LEVEL)
{
KeRaiseIrql(APC_LEVEL, &OldIrql);
IrqlRaised = TRUE;
}
ExAcquireFastMutexUnsafe (&HandleTableMutex);
for (tableIndex = 1; tableIndex < HandleTable->wTableSize; tableIndex++)
@ -204,6 +223,9 @@ GDIOBJ_iGetNextOpenHandleIndex (void)
}
ExReleaseFastMutexUnsafe (&HandleTableMutex);
if(IrqlRaised)
KeLowerIrql(OldIrql);
return (tableIndex < HandleTable->wTableSize) ? tableIndex : 0;
}