=?UTF-8?Q?Bernhard=20=C3=9Cbelacker=20?=: ntoskrnl.exe: Make IoAllocateIrp not crash on negative values.
Alexandre Julliard
julliard at wine.codeweavers.com
Tue Apr 12 10:20:47 CDT 2016
Module: wine
Branch: master
Commit: 64aec5d8dbae329958b9b677d3289de78142e289
URL: http://source.winehq.org/git/wine.git/?a=commit;h=64aec5d8dbae329958b9b677d3289de78142e289
Author: Bernhard Übelacker <bernhardu at vr-web.de>
Date: Tue Mar 29 22:13:16 2016 +0200
ntoskrnl.exe: Make IoAllocateIrp not crash on negative values.
Signed-off-by: Bernhard Übelacker <bernhardu at vr-web.de>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/ntoskrnl.exe/ntoskrnl.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 0e87b82..a52b5df 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -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;
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