linux-kernel - Re: [PATCH 1/1] iommu/vt-d: Fix incorrect pci_for_each_dma

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Message-ID: <e81fb7bb-4a80-4c45-b9fa-5fc485e134ca@linux.intel.com>
Date: Mon, 14 Oct 2024 09:39:20 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
 Robin Murphy <robin.murphy@....com>, Kevin Tian <kevin.tian@...el.com>
Cc: baolu.lu@...ux.intel.com, Todd Brandt <todd.e.brandt@...el.com>,
 iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: Fix incorrect pci_for_each_dma_alias()
 for non-PCI devices

On 2024/10/12 11:07, Lu Baolu wrote:
> Previously, the domain_context_clear() function incorrectly called
> pci_for_each_dma_alias() to set up context entries for non-PCI devices.
> This could lead to kernel hangs or other unexpected behavior.
> 
> Add a check to only call pci_for_each_dma_alias() for PCI devices. For
> non-PCI devices, domain_context_clear_one() is called directly.
> 
> Reported-by: Todd Brandt<todd.e.brandt@...el.com>
> Closes:https://bugzilla.kernel.org/show_bug.cgi?id=219363
> Fixes: 9a16ab9d6402 ("iommu/vt-d: Make context clearing consistent with context mapping")
> Cc:stable@...r.kernel.org
> Signed-off-by: Lu Baolu<baolu.lu@...ux.intel.com>
> ---
>   drivers/iommu/intel/iommu.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)

Queued for v6.12-rc.

Thanks,
baolu