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[34.142.255.199]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-842828821c5sm23191040b3a.32.2026.06.10.07.37.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Jun 2026 07:37:13 -0700 (PDT) Date: Wed, 10 Jun 2026 14:37:04 +0000 From: Pranjal Shrivastava To: Jason Gunthorpe Cc: David Matlack , kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Adithya Jayachandran , Alexander Graf , Alex Williamson , Bjorn Helgaas , Chris Li , David Rientjes , Jacob Pan , Jonathan Corbet , Josh Hilke , Leon Romanovsky , Lukas Wunner , Mike Rapoport , Parav Pandit , Pasha Tatashin , Pratyush Yadav , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Vipin Sharma , William Tu , Yi Liu Subject: Re: [PATCH v6 08/12] PCI: liveupdate: Inherit ACS flags in incoming preserved devices Message-ID: References: <20260522202410.3104264-1-dmatlack@google.com> <20260522202410.3104264-9-dmatlack@google.com> <20260610000704.GR1962447@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260610000704.GR1962447@nvidia.com> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 2E646A0006 X-Stat-Signature: grzs18o4r8c1fdye41or9ezs4rt1x6zq X-Rspam-User: X-HE-Tag: 1781102235-19383 X-HE-Meta: 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 Dz2eWTLn T9SQtoyqtWgWFzkPOLBsmODcLUdvu51EJqrS/Wba5dKWwyEKtbzaIFPLzNJZhOJUt5iLEDfEMxhw/Kncct8E0yDxSG/MbjLpZqljwoeTIBGiFLfCDV3aUQaOONUTwew7FqNeM5TuPGfrzUWOJwrGCbjd+ZQb7nQwBk2s+cctxlrF1+DdXr0/xnSB3maG+X5oT0ypsX95nIsvPvHzJgtlEM3eCJQ+hlI+XujWFis/H1tIuVTfsZx53w/XiGqBWgFBS10u5yjKlagM6E2A8SNMC9JXaRE7H2mhLJXgz370MhDijNHQGJ6T7xMYgCqK+/BL5o6ZFR81QBNZoileZom6a5711mSXjWAJ50CUrKkG0FPnGPer6wC4JxzDnTIcLwc57fWkEEY0RtLTsPVj4kWRm3k0sq1r/RoBy4A92Q8Uu1TIn9xJWv2yTLFJ7MafMQesw6wrX9OHkfQwHmEzqYOKut1KsS4WZ0NGWryaY Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jun 09, 2026 at 09:07:04PM -0300, Jason Gunthorpe wrote: > On Tue, Jun 09, 2026 at 05:20:14PM +0000, Pranjal Shrivastava wrote: > > > Now, the attacker has an opportunity with Liveupdate, since the devices > > are already assigned, if *somehow* it flips a bit like ACS_RR, the > > If this is possible then your environment is already security broken, > no need to involve live update. Ack. Alright. Thanks, Praan