The patch below does not apply to the 3.3-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From fefe1ed1398b81e3fadc92d11d91162d343c8836 Mon Sep 17 00:00:00 2001 From: Dan Carpenter <[email protected]> Date: Sun, 13 May 2012 20:09:38 +0300 Subject: [PATCH] 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 <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Youquan Song <[email protected]> Cc: walter harms <[email protected]> Cc: Suresh Siddha <[email protected]> Cc: <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> 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)) { -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
