From: Lu Baolu <baolu.lu@linux.intel.com>
To: Jerry Snitselaar <jsnitsel@redhat.com>, iommu@lists.linux-foundation.org
Cc: baolu.lu@linux.intel.com, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
stable@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/vt-d: call __dmar_remove_one_dev_info with valid pointer
Date: Wed, 22 Jan 2020 13:43:43 +0800 [thread overview]
Message-ID: <ac036343-18a2-de7e-6bc2-45966f429c16@linux.intel.com> (raw)
In-Reply-To: <20200122003426.16079-1-jsnitsel@redhat.com>
On 1/22/20 8:34 AM, Jerry Snitselaar wrote:
> It is possible for archdata.iommu to be set to
> DEFER_DEVICE_DOMAIN_INFO or DUMMY_DEVICE_DOMAIN_INFO so check for
> those values before calling __dmar_remove_one_dev_info. Without a
> check it can result in a null pointer dereference. This has been seen
> while booting a kdump kernel on an HP dl380 gen9.
>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Lu Baolu <baolu.lu@linux.intel.com>
> Cc: David Woodhouse <dwmw2@infradead.org>
> Cc: stable@vger.kernel.org # 5.3+
> Cc: linux-kernel@vger.kernel.org
> Fixes: ae23bfb68f28 ("iommu/vt-d: Detach domain before using a private one")
> Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
prev parent reply other threads:[~2020-01-22 5:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 0:34 Jerry Snitselaar
2020-01-22 5:43 ` Lu Baolu [this message]
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