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d="scan'208";a="460677441" Received: from allen-box.sh.intel.com (HELO [10.239.159.139]) ([10.239.159.139]) by orsmga005.jf.intel.com with ESMTP; 16 Jul 2020 18:20:06 -0700 Subject: Re: [PATCH v5 5/5] iommu/vt-d: Check UAPI data processed by IOMMU core To: Jacob Pan , iommu@lists.linux-foundation.org, LKML , Joerg Roedel , Alex Williamson References: <1594925117-64892-1-git-send-email-jacob.jun.pan@linux.intel.com> <1594925117-64892-6-git-send-email-jacob.jun.pan@linux.intel.com> From: Lu Baolu Message-ID: Date: Fri, 17 Jul 2020 09:15:28 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <1594925117-64892-6-git-send-email-jacob.jun.pan@linux.intel.com> Content-Language: en-US Cc: "Tian, Kevin" , Raj Ashok , Jonathan Corbet , Jean-Philippe Brucker , Christoph Hellwig , David Woodhouse X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 7/17/20 2:45 AM, Jacob Pan wrote: > IOMMU generic layer already does sanity checks UAPI data for version > match and argsz range under generic information. > Remove the redundant version check from VT-d driver and check for vendor > specific data size. > > Signed-off-by: Jacob Pan Reviewed-by: Lu Baolu Best regards, baolu > --- > drivers/iommu/intel/iommu.c | 3 +-- > drivers/iommu/intel/svm.c | 7 +++++-- > 2 files changed, 6 insertions(+), 4 deletions(-) > > diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c > index f3a6ca88cf95..5e80484f0537 100644 > --- a/drivers/iommu/intel/iommu.c > +++ b/drivers/iommu/intel/iommu.c > @@ -5383,8 +5383,7 @@ intel_iommu_sva_invalidate(struct iommu_domain *domain, struct device *dev, > int ret = 0; > u64 size = 0; > > - if (!inv_info || !dmar_domain || > - inv_info->version != IOMMU_CACHE_INVALIDATE_INFO_VERSION_1) > + if (!inv_info || !dmar_domain) > return -EINVAL; > > if (!dev || !dev_is_pci(dev)) > diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c > index 713b3a218483..55ea11e9c0f5 100644 > --- a/drivers/iommu/intel/svm.c > +++ b/drivers/iommu/intel/svm.c > @@ -240,8 +240,11 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev, > if (WARN_ON(!iommu) || !data) > return -EINVAL; > > - if (data->version != IOMMU_GPASID_BIND_VERSION_1 || > - data->format != IOMMU_PASID_FORMAT_INTEL_VTD) > + if (data->format != IOMMU_PASID_FORMAT_INTEL_VTD) > + return -EINVAL; > + > + /* IOMMU core ensures argsz is more than the start of the union */ > + if (data->argsz < offsetofend(struct iommu_gpasid_bind_data, vendor.vtd)) > return -EINVAL; > > if (!dev_is_pci(dev)) > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu