diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-05-13 20:09:38 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-14 14:37:47 +0200 |
| commit | fefe1ed1398b81e3fadc92d11d91162d343c8836 (patch) | |
| tree | 4d3a4bb29e7afc03ab7f1669727bb1e082ce8226 | |
| parent | c558df4a01a9ec7b02303aba808d1e5044822add (diff) | |
| download | linux-fefe1ed1398b81e3fadc92d11d91162d343c8836.tar.bz2 | |
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>
| -rw-r--r-- | 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 5ef65cf66152..3a74e4410fc0 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)) { |