linux-kernel - RE: [PATCH] iommu: fsl_pamu.c: Fix for possible null pointer dereference

Open Source and information security mailing list archives

Date:	Wed, 21 May 2014 03:58:15 +0000
From:	"Bharat.Bhushan@...escale.com" <Bharat.Bhushan@...escale.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Joerg Roedel <joro@...tes.org>,
	Grant Likely <grant.likely@...aro.org>
CC:	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"Rob Herring" <robh+dt@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] iommu: fsl_pamu.c: Fix for possible null pointer
 dereference

> -----Original Message-----
> From: iommu-bounces@...ts.linux-foundation.org [mailto:iommu-
> bounces@...ts.linux-foundation.org] On Behalf Of Rickard Strandqvist
> Sent: Saturday, May 17, 2014 10:47 PM
> To: Joerg Roedel; Grant Likely
> Cc: devicetree@...r.kernel.org; iommu@...ts.linux-foundation.org; Rob Herring;
> linux-kernel@...r.kernel.org; Rickard Strandqvist
> Subject: [PATCH] iommu: fsl_pamu.c: Fix for possible null pointer dereference
> 
> There is otherwise a risk of a possible null pointer dereference.

You are right. 

> 
> Was largely found by using a static code analysis program called cppcheck.
> 
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>

Reviewed-by: Bharat Bhushan <bharat.bhushan@...escale.com>

Thanks
-Bharat

> ---
>  drivers/iommu/fsl_pamu.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index
> cba0498..b99dd88 100644
> --- a/drivers/iommu/fsl_pamu.c
> +++ b/drivers/iommu/fsl_pamu.c
> @@ -592,8 +592,7 @@ found_cpu_node:
>  		/* advance to next node in cache hierarchy */
>  		node = of_find_node_by_phandle(*prop);
>  		if (!node) {
> -			pr_debug("Invalid node for cache hierarchy %s\n",
> -				node->full_name);
> +			pr_debug("Invalid node for cache hierarchy\n");
>  			return ~(u32)0;
>  		}
>  	}
> --
> 1.7.10.4
> 
> _______________________________________________
> iommu mailing list
> iommu@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
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