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Commit fefe1ed1 authored by Dan Carpenter's avatar Dan Carpenter Committed by Ingo Molnar
Browse files

iommu: Fix off by one in dmar_get_fault_reason() 



fault_reason - 0x20 == ARRAY_SIZE(irq_remap_fault_reasons) is
one past the end of the array.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Cc: Youquan Song <youquan.song@intel.com>
Cc: walter harms <wharms@bfs.de>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/20120513170938.GA4280@elgon.mountain


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent c558df4a

drivers/iommu/dmar.c

+2 −2
Original line number Diff line number Diff line
@@ -1057,7 +1057,7 @@ static const char *irq_remap_fault_reasons[] = 


const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type)

{

	if (fault_reason >= 0x20 && (fault_reason <= 0x20 +

	if (fault_reason >= 0x20 && (fault_reason - 0x20 <

					ARRAY_SIZE(irq_remap_fault_reasons))) {

		*fault_type = INTR_REMAP;

		return irq_remap_fault_reasons[fault_reason - 0x20];