Hi Frank, I have been reading up on this particular bug for the last few days now, and I think I understand what is going on.
Firstly, the commit you requested: commit 7987b694ade8cc465ce10fb3dceaa614f13ceaf3 Author: Trond Myklebust <[email protected]> Date: Wed May 29 12:49:52 2019 -0400 Subject: SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential This commit fixes a problem which was introduced by an earlier commit: commit cea57789e4081870ac3498fbefabbbd0d0fd8434 Author: Trond Myklebust <[email protected]> Date: Sat Mar 9 16:06:47 2019 -0500 Subject: SUNRPC: Clean up Now, this earlier commit "SUNRPC: Clean up" is not present in the current bionic 5.0 HWE kernel, which would mean that you might be facing a different bug entirely. Is there any chance that you can provide more information about your system? Can you provide a stack trace output by dmesg, or in /var/log/kern.log for this problem, or better still, can you provide a sosreport? https://support.canonical.com/ua/s/article/canonical-support-data- collection-sosreport Since the bug can still be triggered in different paths, I am in the process of backporting the commit you requested to the 5.0 kernel. The code has changed a lot between 5.2 where the patch was introduced, and 5.0 where I am backporting it to. I think I have created a good backport, which are below if you are interested: https://paste.ubuntu.com/p/BPD3PzmZ97/ https://paste.ubuntu.com/p/bmHMD7SPGX/ I am currently building a test kernel with the above patches applied for bionic, and I will let you know once it is ready, likely tomorrow. Once it has finished building I will ask you to install it to validate that it solves the problem you are facing. In the meantime, can you get me a sosreport from the affected system, and I will let you know when the test kernel is ready. Please do not post the sosreport publicly, and instead attach it to the SF case. Let me know if you have any questions, Thanks, Matthew ** Tags added: sts -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1842037 Title: Oops when Kerberos credentials are invalid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-hwe/+bug/1842037/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
