Control: tags -1 + moreinfo Hi,
On Sat, Mar 12, 2022 at 01:21:23AM +0000, Reilly Brogan wrote: > Package: linux-image-cloud-amd64 > Severity: important > > Dear Maintainer, > > We recently noticed that instances using linux-image-5.10.0-11-amd64 and > newer and using Xen-based EC2 instances (such as m4.large, c4.large etc) > wouldn't join our Kubernetes clusters. We eventually figured out that > this was a kernel-related issue as older AMIs using an older kernel were > able to join the cluster. > > When this issue occurs the AWS console log for the instance doesn't show > any errors except that it's noticeable that the instance doesn't get an > IP address and is therefore not able to bootstrap itself. > > I bisected this issue and it was introduced in kernel 5.10.88 as commit > e5949933f313c9e2c30ba05b977a047148b5e38c "PCI/MSI: Mask MSI-X vectors > only on success", thus present in linux-image-5.10.0-11-amd64 which uses > the 5.10.92 kernel (and all newer versions of the package). > > I recommend reverting this commit in Bullseye and Buster (the > aforementioned commit is also in the 4.19 tree) and working with > upstream to get it fixed. > > How to reproduce: > 1. Start any recent AMD64 AMI (such as one from > https://wiki.debian.org/Cloud/AmazonEC2Image/Bullseye) on a c4.large > instance > 2. Attempt to SSH to the instance (which will hang) > 3. Observe in the AWS console logs that the instance did not receive an > IP address) Can you report this issue to upstream? Regards, Salvatore
