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Date: Tue, 25 Aug 2009 20:54:10 +0200 From: Jiri Slaby <jirislaby@...il.com> To: tony.luck@...el.com Cc: linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org, Jiri Slaby <jirislaby@...il.com>, Fenghua Yu <fenghua.yu@...el.com> Subject: [PATCH 1/1] ia64: pci_br, fix infinite loop When * there is almost out of ates * one asks for more than one ate * there are some available at the end of ate array then the inner for loop will end without incrementing 'index'. This means the outer loop will start at the same point finding it's available and runs the inner loop again from the same index. This repeats forever. Hence make sure we check we were at the end of ate array and return an error in such case. Signed-off-by: Jiri Slaby <jirislaby@...il.com> Cc: Tony Luck <tony.luck@...el.com> Cc: Fenghua Yu <fenghua.yu@...el.com> Found-by: Jeff Mahoney <jeffm@...ell.com> --- arch/ia64/sn/pci/pcibr/pcibr_ate.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/ia64/sn/pci/pcibr/pcibr_ate.c b/arch/ia64/sn/pci/pcibr/pcibr_ate.c index 239b3ce..5bc34ea 100644 --- a/arch/ia64/sn/pci/pcibr/pcibr_ate.c +++ b/arch/ia64/sn/pci/pcibr/pcibr_ate.c @@ -54,6 +54,8 @@ static int find_free_ate(struct ate_resource *ate_resource, int start, break; } } + if (i >= ate_resource->num_ate) + return -1; } else index++; /* Try next ate */ } -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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