From: Will Deacon <will@kernel.org>
To: Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>,
Ethan Milon <ethan.milon@eviden.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Lu Baolu <baolu.lu@linux.intel.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: Fix UAF on sva unbind with pending IOPFs
Date: Wed, 23 Jul 2025 13:52:52 +0100 [thread overview]
Message-ID: <175327211759.77634.8242308703852038544.b4-ty@kernel.org> (raw)
In-Reply-To: <20250723072045.1853328-1-baolu.lu@linux.intel.com>
On Wed, 23 Jul 2025 15:20:45 +0800, Lu Baolu wrote:
> Commit 17fce9d2336d ("iommu/vt-d: Put iopf enablement in domain attach
> path") disables IOPF on device by removing the device from its IOMMU's
> IOPF queue when the last IOPF-capable domain is detached from the device.
> Unfortunately, it did this in a wrong place where there are still pending
> IOPFs. As a result, a use-after-free error is potentially triggered and
> eventually a kernel panic with a kernel trace similar to the following:
>
> [...]
Applied to iommu (intel/vt-d), thanks!
[1/1] iommu/vt-d: Fix UAF on sva unbind with pending IOPFs
https://git.kernel.org/iommu/c/f0b9d31c6edd
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2025-07-23 12:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-23 7:20 Lu Baolu
2025-07-23 12:52 ` Will Deacon [this message]
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