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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=mBzOp2nr; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 435E5606A31C; Fri, 13 Nov 2026 12:12:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=mBzOp2nr Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E07B1F000C4; Fri, 13 Nov 2026 12:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794571926; bh=hUpll3Sqlpstz/baEJwQVT6KXqEOrUirP5628aOYEd8=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=mBzOp2nrY2ILEs+Bt2956pFclJkMEqfLIpZeInaPOiT2oreFTereBuBr0Kh6vQXea 8xcTJ/zmvwTvStx41Ih7tV1IX6GYExZeAUMNnkyvcTivBowJse54OL91MUruriP9Ds hkMt9FsCcAbJJ0oHHdk5NC1t90b+Q6ahA6x5aifpDmZYqsogORYJqyjR45pITR/aD3 SjPqfFYhWFynQW+35TnIjzLU3B4RXJJAmtWesW7vUmv/66jmqPrHRszAzf8COyfga7 Cq/zKOAXkEdD6BGyyAc1eSwDtqe793wiDKdJyLU2vEE8VdiBW5+YjubYANwv2qXNmX eeFLVXB9hbBIg== Message-ID: <66bcbef9-1967-41c0-8204-6e96016be4ff@kernel.org> Date: Fri, 13 Nov 2026 13:11:54 +0100 X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 2/5] iommu: Use resource_size_t for reserved region length To: Vikash Garodia , "Joerg Roedel (AMD)" , Vasant Hegde , Suravee Suthikulpanit , Will Deacon , Robin Murphy , David Woodhouse , Lu Baolu , Jean-Philippe Brucker , Rob Herring , Saravana Kannan , Tomasz Nowicki , Eric Auger , Bryan O'Donoghue , Joerg Roedel , Srinath Mannam , Oza Pawandeep , Lorenzo Pieralisi , Bjorn Helgaas , Alex Williamson Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, devicetree@vger.kernel.org, kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, Sashiko , stable@vger.kernel.org, Vishnu Reddy References: <20261106-add_iommu_ranges-v7-0-5c0f72083e52@oss.qualcomm.com> <20261106-add_iommu_ranges-v7-2-5c0f72083e52@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 06/11/2026 18:14, Vikash Garodia wrote: > On 32-bit systems with LPAE, physical addresses are 64-bit. A reserved > region can be larger than 4GiB, but its length is stored as size_t, > which is only 32-bit there. The length gets truncated. > Use resource_size_t for the length so it matches the width of > phys_addr_t and holds the full size of the region. > > Fixes: 2b20cbba3390 ("iommu: iommu_alloc_resv_region") > Reported-by: Sashiko > Closes: https://lore.kernel.org/all/d223ee9f-b262-408a-a201-8b16d310bbe0@oss.qualcomm.com > Cc: stable@vger.kernel.org > Co-developed-by: Vishnu Reddy > Signed-off-by: Vishnu Reddy > Signed-off-by: Vikash Garodia > --- > drivers/iommu/amd/iommu.c | 2 +- > drivers/iommu/intel/iommu.c | 2 +- > drivers/iommu/iommu.c | 2 +- > drivers/iommu/of_iommu.c | 4 ++-- > drivers/iommu/virtio-iommu.c | 2 +- > drivers/of/address.c | 2 +- > drivers/vfio/vfio_iommu_type1.c | 2 +- > include/linux/iommu.h | 4 ++-- > include/linux/of_address.h | 2 +- > 9 files changed, 11 insertions(+), 11 deletions(-) > Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof