Marking verification done for the master kernel. The circumstance that triggers the bug that this patch fixes requires an Azure CVM instance with swiotlb=force.
** Tags removed: verification-needed-focal ** Tags added: verification-done-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1967292 Title: net/mlx5e: Fix page DMA map/unmap attributes Status in linux package in Ubuntu: Fix Released Status in linux source package in Focal: Fix Committed Status in linux source package in Impish: Fix Released Status in linux source package in Jammy: Fix Released Bug description: SRU Justification [Impact] Upstream commit 0b7cfa4082fbf550595bc0e40f05614bd83bf0cd is a fix to the Mellanox mlx5 driver that we would like to have you pick up. It fixes a bug that was introduced in the 4.7 kernel, so it should be applicable to pretty much every Linux distribution. The bug causes a Linux panic when a Mellanox CX-4 VF is present in the VM (for AccelNet) and swiotlb=force used on the kernel boot line. swiotlb=force would not normally be used, which is why we haven’t seen the problem reported previously, but it cropped up during some internal testing. We are trying to head off a potential problem in a future scenario for Confidential VMs. Primarily we want to ensure that any CVMs images have this fix, as we don’t want CVM images to exist in the wild that would fail in the future when CVMs with AccelNet are offered. Business Impact This scenario could also exist in non-Azure instances. [Test Case] Microsoft tested. [Where problems could appear] Weird DMA and data corruption issues might crop up. [Other Info] SF: #00328938 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1967292/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
