Hi Frank, The test kernel has built, and I have tested it to ensure it boots, but I now need you to verify that the backported patches fix the issue that you are having.
Can you please install the test kernel onto a system which is having problems with NFS clients that are connecting with invalid kerberos credentials? Please note this kernel is NOT SUPPORTED by Canonical, and is for TESTING PURPOSES ONLY. ONLY Install in a dedicated test environment. Instructions to install (on a bionic system): 1) sudo add-apt-repository ppa:mruffell/sf241068-test 2) sudo apt-get update 3) sudo apt install linux-image-unsigned-5.0.0-27-generic linux-headers-5.0.0-27-generic linux-headers-5.0.0-27 linux-modules-5.0.0-27-generic linux-modules-extra-5.0.0-27-generic 4) reboot 5) uname -rv 5.0.0-27-generic #28~18.04.1+hf241068v20190910b2-Ubuntu SMP Tue Sep 10 06:53:53 U If you get output different from above then you need to edit grub configuration to boot the correct kernel. If you are asked to abort the kernel install due to removing the running kernel, say no. This kernel contains the below patches you requested: https://paste.ubuntu.com/p/BPD3PzmZ97/ https://paste.ubuntu.com/p/74n7nq5Wfj/ Please test the kernel and let me know if it fixes your problem. If you could also provide a stack trace or sosreport of the original issue, that would be good as well. Let me know if you have any questions, Thanks, Matthew ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Disco) Importance: Undecided Status: New ** Also affects: linux-meta-hwe (Ubuntu Disco) Importance: Undecided Status: New ** Changed in: linux-meta-hwe (Ubuntu) Status: New => Invalid ** Changed in: linux-meta-hwe (Ubuntu Disco) Status: New => Invalid ** Changed in: linux (Ubuntu Disco) Status: New => In Progress ** Changed in: linux (Ubuntu Disco) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Disco) Assignee: (unassigned) => Matthew Ruffell (mruffell) ** No longer affects: linux-meta-hwe (Ubuntu) ** No longer affects: linux-meta-hwe (Ubuntu Disco) -- 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/1842037 Title: Oops when Kerberos credentials are invalid Status in linux package in Ubuntu: New Status in linux source package in Disco: In Progress Bug description: There's a bug in Linux Kernel 5.0 which is triggered by invalid credentials when the NFS clients is trying to aquire them via GSSD. This affects NFS-Shares that are protected by krb5* security. They become unusable until the system is re-booted. The problem is quite severe on terminal servers with multiple users - some of them not caring about refreshing their kerberos tickets. A fix is available here: <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/sunrpc/clnt.c?id=7987b694ade8cc465ce10fb3dceaa614f13ceaf3> To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1842037/+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
