linux-kernel - Re: [PATCH] iommu/arm-smmu-v3: fix probe device bug due to duplicated stream IDS.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251023181235.GH21554@ziepe.ca>
Date: Thu, 23 Oct 2025 15:12:35 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Reaper Li <reaperlioc@...nfly.com>
Cc: will@...nel.org, robin.murphy@....com, joro@...tes.org,
	linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/arm-smmu-v3: fix probe device bug due to
 duplicated stream IDS.

On Sat, Oct 11, 2025 at 10:30:03AM +0800, Reaper Li wrote:
> From: Reaper <reaperlioc@...nfly.com>
> 
> Commit 9246b487ab3c ("PCI: Add function 0 DMA alias quirk for Glenfly Arise
> chip ") add quirk to fix hda dma request issue, but IORT logic populaties
> two identical IDs into the fwspec->ids array via DMA aliasing in
> iort_pci_iommu_init() called by pci_for_each_dma_alias().

I'd rather we not have duplicate IDs in the same fwspec, can we avoid
that at the source?

Jason