From: Jan Kiszka <jan.kiszka@web.de>
To: Sheng Yang <sheng@linux.intel.com>,
David Woodhouse <dwmw2@infradead.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
kvm <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
iommu@lists.linux-foundation.org
Subject: Re: [PATCH] intel-iommu: Fix use after release during device attach
Date: Sun, 14 Nov 2010 10:18:37 +0100 [thread overview]
Message-ID: <4CDFA96D.1060301@web.de> (raw)
In-Reply-To: <201011021531.22886.sheng@linux.intel.com>
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Am 02.11.2010 08:31, Sheng Yang wrote:
> On Tuesday 02 November 2010 15:05:51 Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@siemens.com>
>>
>> Obtail the new pgd pointer before releasing the page containing this
>> value.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
>> ---
>>
>> Who is taking care of this? The kvm tree?
>>
>> drivers/pci/intel-iommu.c | 2 +-
>> 1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
>> index 4789f8e..35463dd 100644
>> --- a/drivers/pci/intel-iommu.c
>> +++ b/drivers/pci/intel-iommu.c
>> @@ -3627,9 +3627,9 @@ static int intel_iommu_attach_device(struct
>> iommu_domain *domain,
>>
>> pte = dmar_domain->pgd;
>> if (dma_pte_present(pte)) {
>> - free_pgtable_page(dmar_domain->pgd);
>> dmar_domain->pgd = (struct dma_pte *)
>> phys_to_virt(dma_pte_addr(pte));
>> + free_pgtable_page(pte);
>> }
>> dmar_domain->agaw--;
>> }
>
> Reviewed-by: Sheng Yang <sheng@linux.intel.com>
>
> CC iommu mailing list and David.
Ping...
I think this fix also qualifies for stable (.35 and .36).
Jan
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next prev parent reply other threads:[~2010-11-14 9:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-02 7:05 [PATCH] intel-iommu: Fix use after release during device attach Jan Kiszka
2010-11-02 7:31 ` Sheng Yang
2010-11-02 7:46 ` Jan Kiszka
2010-11-02 7:57 ` Sheng Yang
2010-11-02 8:00 ` Sheng Yang
2010-11-14 9:18 ` Jan Kiszka [this message]
2010-12-10 8:36 ` Jan Kiszka
2010-12-10 18:44 ` Chris Wright
2011-01-04 10:42 ` Jan Kiszka
2011-04-21 12:32 ` [PATCH v2] " Jan Kiszka
2011-04-21 14:02 ` Chris Wright
2011-04-21 14:28 ` Alex Williamson
2011-04-21 15:42 ` David Woodhouse
2011-04-21 16:14 ` Alex Williamson
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