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From: Joerg Roedel <joro@8bytes.org>
To: Joao Martins <joao.m.martins@oracle.com>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	Dan Carpenter <dan.carpenter@oracle.com>
Subject: Re: [PATCH] iommu/amd: Fix potential @entry null deref
Date: Fri, 18 Sep 2020 10:36:18 +0200	[thread overview]
Message-ID: <20200918083618.GF31590@8bytes.org> (raw)
In-Reply-To: <20200910171621.12879-1-joao.m.martins@oracle.com>

On Thu, Sep 10, 2020 at 06:16:21PM +0100, Joao Martins wrote:
> After commit 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after
> programming IRTE"), smatch warns:
> 
> 	drivers/iommu/amd/iommu.c:3870 amd_iommu_deactivate_guest_mode()
>         warn: variable dereferenced before check 'entry' (see line 3867)
> 
> Fix this by moving the @valid assignment to after @entry has been checked
> for NULL.
> 
> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> Fixes: 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after programming IRTE")
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
> ---
>  drivers/iommu/amd/iommu.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied for v5.9, thanks.
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Joao Martins <joao.m.martins@oracle.com>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: Re: [PATCH] iommu/amd: Fix potential @entry null deref
Date: Fri, 18 Sep 2020 10:36:18 +0200	[thread overview]
Message-ID: <20200918083618.GF31590@8bytes.org> (raw)
In-Reply-To: <20200910171621.12879-1-joao.m.martins@oracle.com>

On Thu, Sep 10, 2020 at 06:16:21PM +0100, Joao Martins wrote:
> After commit 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after
> programming IRTE"), smatch warns:
> 
> 	drivers/iommu/amd/iommu.c:3870 amd_iommu_deactivate_guest_mode()
>         warn: variable dereferenced before check 'entry' (see line 3867)
> 
> Fix this by moving the @valid assignment to after @entry has been checked
> for NULL.
> 
> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> Fixes: 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after programming IRTE")
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
> ---
>  drivers/iommu/amd/iommu.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied for v5.9, thanks.

  parent reply	other threads:[~2020-09-18  8:36 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-10 17:16 [PATCH] iommu/amd: Fix potential @entry null deref Joao Martins
2020-09-10 17:16 ` Joao Martins
2020-09-11  3:24 ` Suravee Suthikulpanit
2020-09-11  3:24   ` Suravee Suthikulpanit
2020-09-18  8:36 ` Joerg Roedel [this message]
2020-09-18  8:36   ` Joerg Roedel

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