From: tip-bot for Dan Carpenter <dan.carpenter@oracle.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
joerg.roedel@amd.com, youquan.song@intel.com, stable@kernel.org,
suresh.b.siddha@intel.com, tglx@linutronix.de, wharms@bfs.de,
dan.carpenter@oracle.com
Subject: [tip:core/iommu] iommu: Fix off by one in dmar_get_fault_reason()
Date: Mon, 14 May 2012 06:42:05 -0700 [thread overview]
Message-ID: <tip-fefe1ed1398b81e3fadc92d11d91162d343c8836@git.kernel.org> (raw)
In-Reply-To: <20120513170938.GA4280@elgon.mountain>
Commit-ID: fefe1ed1398b81e3fadc92d11d91162d343c8836
Gitweb: http://git.kernel.org/tip/fefe1ed1398b81e3fadc92d11d91162d343c8836
Author: Dan Carpenter <dan.carpenter@oracle.com>
AuthorDate: Sun, 13 May 2012 20:09:38 +0300
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 14 May 2012 14:37:47 +0200
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: Dan 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: Ingo Molnar <mingo@kernel.org>
---
drivers/iommu/dmar.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 5ef65cf..3a74e44 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1057,8 +1057,8 @@ 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 +
- ARRAY_SIZE(irq_remap_fault_reasons))) {
+ 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];
} else if (fault_reason < ARRAY_SIZE(dma_remap_fault_reasons)) {
next prev parent reply other threads:[~2012-05-14 13:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 10:59 [patch] iommu: off by one in dmar_get_fault_reason() Dan Carpenter
2012-05-12 12:36 ` walter harms
2012-05-13 17:09 ` [patch v2] " Dan Carpenter
2012-05-14 13:42 ` tip-bot for Dan Carpenter [this message]
2012-05-13 17:12 ` [patch] " Dan Carpenter
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