** Attachment added: "Pstore log no 1 from Ubuntu 5.15.0-60" https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.15/+bug/2008128/+attachment/5649201/+files/linux_5.15.0-60_pstore1.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.15 in Ubuntu. https://bugs.launchpad.net/bugs/2008128 Title: Double fault in cpu_entry_area while resuming from suspend Status in linux-signed-hwe-5.15 package in Ubuntu: New Bug description: Hello, On kernel 5.15.0-60-generic from Ubuntu, I had an occurrence of a double fault while resuming from suspend. I'm attaching logs from pstore. I run mostly upstream kernels. The same (or a similar) problem has happened to me a few times on rc releases of Linux 6.1, the first time in November 2022 on 6.1.0-rc5. It stopped happening since I have moved to rc releases of Linux 6.2. So I think that a similar bug was introduced in Linux 6.1 and fixed in Linux 6.2 and probably carried over with stable patches to Ubuntu's 5.15.0-60-generic. I was not able to reproduce this bug reliably on Linux 6.1 back then, and I did not report the problem to LKML (I'm sorry). In all occurrences (on Linux 5.15 and 6.1), the fault has happened at address 0xfffffe000000b000, which according to https://www.kernel.org/doc/Documentation/x86/x86_64/mm.txt lies in the cpu_entry_area mapping, I think that it is in a guard page there. Every time, this has happened while resuming from suspend. Every time, there were some RCU functions present in the pstore stack traces. I have some patches in mainline Linux and I'm happy to assist in any troubleshooting. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.15.0-60-generic 5.15.0-60.66~20.04.1 ProcVersionSignature: Ubuntu 5.15.0-60.66~20.04.1-generic 5.15.78 Uname: Linux 5.15.0-60-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.25 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: GNOME-Classic:GNOME Date: Wed Feb 22 21:06:51 2023 InstallationDate: Installed on 2020-09-12 (892 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=pl_PL.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-hwe-5.15 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.15/+bug/2008128/+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
