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X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 6/11/25 4:29 AM, Sairaj Kodilkar wrote: > > > On 5/2/2025 7:45 AM, Alejandro Jimenez wrote: >>   next: >> -        iova = iova_next; >> +        iova = (iova & ~(pagesize - 1)) + pagesize; > > Hi Alejandro, > While experimenting with iommu.forcedac=1, I found that above line > causes unsigned integer overflow for 64 bit IOVAs. This results in an > infinite loop. > > Please add a overflow check here. > Good catch. Reproduced it and tested the fix; will include it in next revision. Thank you, Alejandro > Thanks > Sairaj Kodilkar >