From: Li Ximo <lixicaicai@gmail.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: "Joerg Roedel (AMD)" <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Wang Haoran <haoranwangsec@gmail.com>,
Li Ximo <lixicaicai@gmail.com>
Subject: Re: [PATCH] iommu: Guard iommu_group_first_dev() against an empty device list
Date: Tue, 3 Nov 2026 16:48:05 +0800 [thread overview]
Message-ID: <20261103084805.2465010-1-lixicaicai@gmail.com> (raw)
In-Reply-To: <20261026143758.GA1674867@ziepe.ca>
Hi Jason,
On Mon, Oct 26, 2026 at 11:37:58AM -0300, Jason Gunthorpe wrote:
> Are any of these even possible to be called with an empty group? How?
>
> The giant wall of text at the top failed to explain how this could
> ever even happen.
You are right to push on this. After re-auditing the call paths on
7.3, I could not demonstrate a reachable path that calls these helpers
with an empty group. I was wrong to present this as a real bug without
a demonstrated trigger. Please consider the patch withdrawn. Sorry for
the noise, and thanks for the review.
Best regards,
Li Ximo
prev parent reply other threads:[~2026-11-03 8:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 6:57 Li Ximo
2026-10-26 14:37 ` Jason Gunthorpe
2026-11-03 8:48 ` Li Ximo [this message]
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