[Bug 2056706] Re: System unstable, kernel ring buffer flooded with "BUG: Bad page state in process swapper/0"

The fix worked for our Xen virtual machines, and I assume the fix needs
to be done on all those platforms, because
https://bugzilla.kernel.org/show_bug.cgi?id=218654 fixes an actual bug
in a Xen driver. There's even talk in the bug about making a CVE.

But, I have no way to explicitly confirm those other kernels, but I'm
inclined to change the tags to 'verification-done' to avoid a automated
rollback.

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https://bugs.launchpad.net/bugs/2056706

Title:
System unstable, kernel ring buffer flooded with "BUG: Bad page state
in process swapper/0"

Status in linux package in Ubuntu:
Fix Released

Bug description:
After upgrading a homelab 24.04 test machine from 6.6 to 6.8 kernel
that was recently introduced, the test machine started flooding the
terminal with following messages:

[ 1877.712068] BUG: Bad page state in process swapper/0 pfn:58919

The process name varies and appears to be whatever is currently doing
something. I installed a fresh up to date copy to see if this could be
replicated elsewhere and the outcome is the same. Both of the machines
are VMs running under Xen with XCP-ng, although unsure if it's
related.

The issue produces a notable amount of syslog entries. If left
running, the system will eventually go into a state where processes
get stuck and do not react to systemd control, even when there's no
notable load, no memory pressure nor is the disk space low.

Booted back to 6.6 kernel the issue no longer happens.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-11-generic 6.8.0-11.11
ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4
Uname: Linux 6.8.0-11-generic x86_64
AlsaDevices:
total 0
crw-rw----+ 1 root audio 116, 1 Mar 11 00:31 seq
crw-rw----+ 1 root audio 116, 33 Mar 11 00:31 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: pass
Date: Mon Mar 11 00:36:24 2024
InstallationDate: Installed on 2024-03-11 (0 days ago)
InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Daily amd64 (20240222)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU Tablet
Lsusb-t:
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 002: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
MachineType: Xen HVM domU
PciMultimedia:

ProcEnviron:
LANG=en_US.UTF-8
LC_CTYPE=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
ProcFB: 0 bochs-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-11-generic root=UUID=97002c6c-ab61-49d5-b937-891e4e8da514 ro
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-11-generic N/A
linux-backports-modules-6.8.0-11-generic N/A
linux-firmware 20240202.git36777504-0ubuntu1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/31/2024
dmi.bios.release: 4.13
dmi.bios.vendor: Xen
dmi.bios.version: 4.13
dmi.chassis.type: 1
dmi.chassis.vendor: Xen
dmi.modalias: dmi:bvnXen:bvr4.13:bd01/31/2024:br4.13:svnXen:pnHVMdomU:pvr4.13:cvnXen:ct1:cvr:sku:
dmi.product.name: HVM domU
dmi.product.version: 4.13
dmi.sys.vendor: Xen

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