From: Dan Carpenter <dan.carpenter@oracle.com>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, Joerg Roedel <joerg.roedel@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Youquan Song <youquan.song@intel.com>,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] iommu: off by one in dmar_get_fault_reason()
Date: Sat, 12 May 2012 10:59:36 +0000 [thread overview]
Message-ID: <20120512105935.GA19472@elgon.mountain> (raw)
fault_reason = ARRAY_SIZE(irq_remap_fault_reasons) + 0x20 - 0x20 is one
past the end of the array.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 5ef65cf..9390f3f 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -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];
next reply other threads:[~2012-05-12 10:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 10:59 Dan Carpenter [this message]
2012-05-12 12:36 ` [patch] iommu: off by one in dmar_get_fault_reason() walter harms
2012-05-13 17:09 ` [patch v2] " Dan Carpenter
2012-05-13 17:12 ` [patch] " Dan Carpenter
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