Hi Frank, Thanks for the update. Let me know how the test kernel goes when users are on the system.
I looked into your stack trace and found the below link: https://lore.kernel.org/lkml/20190529151003.hzmesyoiopnbc...@aura.draconx.ca/T/ I'm sure you have probably found it too when researching the bug, and the commit needed to fix it. Can you try running the reproducer? > OK, I think I found something that triggers this fault. This happens > when certain local users try to stat a file or directory on an nfs > mount. Presumably these UIDs do not have appropriate permissions on > the server but I'm not sure exactly (I do not control the server). > > I can reproduce the oops with a command like this: > > # su -s/bin/sh -c 'stat /path/to/nfs/file' problematic_user > > which oopes every time (and SIGKILLs the stat command). Otherwise, let me know how the test kernel goes when opened up to users. Thanks, Matthew -- 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: Incomplete 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
