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ntoskrnl.exe: Make IoAllocateIrp not crash on negative values. 

Signed-off-by: Bernhard Übelacker <bernhardu@vr-web.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Bernhard Übelacker 2016-03-29 22:13:16 +02:00 committed by Alexandre Julliard
parent 376daa91d8
commit 64aec5d8db
1 changed files with 7 additions and 2 deletions
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9
dlls/ntoskrnl.exe/ntoskrnl.c
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@ -592,15 +592,20 @@ PIRP WINAPI IoAllocateIrp( CCHAR stack_size, BOOLEAN charge_quota )
{
SIZE_T size;
PIRP irp;
CCHAR loc_count = stack_size;
TRACE( "%d, %d\n", stack_size, charge_quota );
size = sizeof(IRP) + stack_size * sizeof(IO_STACK_LOCATION);
if (loc_count < 8 && loc_count != 1)
loc_count = 8;
size = sizeof(IRP) + loc_count * sizeof(IO_STACK_LOCATION);
irp = ExAllocatePool( NonPagedPool, size );
if (irp == NULL)
return NULL;
IoInitializeIrp( irp, size, stack_size );
irp->AllocationFlags = IRP_ALLOCATED_FIXED_SIZE;
if (stack_size >= 1 && stack_size <= 8)
irp->AllocationFlags = IRP_ALLOCATED_FIXED_SIZE;
if (charge_quota)
irp->AllocationFlags |= IRP_LOOKASIDE_ALLOCATION;
return irp;