Attached patch, developed in conjunction with the ENA dev team, fixes the problem. This patch is soon-to-be submitted upstream.
** Patch added: "0001-UBUNTU-SAUCE-net-ena-fix-crash-during-ena_remove.patch" https://bugs.launchpad.net/ubuntu/disco/+source/linux-aws/+bug/1802341/+attachment/5210458/+files/0001-UBUNTU-SAUCE-net-ena-fix-crash-during-ena_remove.patch -- 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/1802341 Title: crash in ENA driver on removing an interface Status in linux package in Ubuntu: In Progress Status in linux-aws package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Status in linux-aws source package in Xenial: In Progress Status in linux source package in Bionic: In Progress Status in linux-aws source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Status in linux-aws source package in Cosmic: In Progress Status in linux source package in Disco: In Progress Status in linux-aws source package in Disco: In Progress Bug description: Bug present in ENA since driver version 1.6; manifests as a crash only under some conditions. In ena_remove() we have the following stack call: ena_remove() unregister_netdev() ena_destroy_device() netif_carrier_off() Calling netif_carrier_off() causes linkwatch to try to handle the link change event on the already unregistered netdev, which leads to a read from an unreadable memory address. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802341/+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