openvswitch: nf_ct_put is called with null pointer

[Nick Rogers]

Using an openvswitch bridge with conntrack flows causes a kernel warning trace for every packet. This does not break conntrack functionality, but causes a big packet forwarding performance degradation and very noisy and large kernel.log/journal/syslog/etc. The cause is a regression in the 5.15 LTS kernel. This seems to have been fixed in mainline 5.15.36, but I don't see the fix in any of the jammy branches.

Upgrading to mainline 5.15.36 or beyond from the Ubuntu PPA fixes the problem.

Here is a relevant discussion with reference to the fix applied to mainline:
https://<email address hidden>/T/

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-39-generic 5.15.0-39.42
ProcVersionSignature: Ubuntu 5.15.0-39.42-generic 5.15.35
Uname: Linux 5.15.0-39-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl icp
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Jun 15 15:38 seq
 crw-rw---- 1 root audio 116, 33 Jun 15 15:38 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckMismatches: ./boot/grub/grub.cfg
CasperMD5CheckResult: fail
Date: Wed Jun 15 15:41:13 2022
InstallationDate: Installed on 2022-06-15 (0 days ago)
InstallationMedia: Ubuntu-Server 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220421)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Supermicro SYS-E300-8D
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-39-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-39-generic N/A
 linux-backports-modules-5.15.0-39-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu3.2
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/31/2017
dmi.bios.release: 5.6
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.0c
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X10SDV-TP8F
dmi.board.vendor: Supermicro
dmi.board.version: 1.01
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 1
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 0123456789
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.0c:bd10/31/2017:br5.6:svnSupermicro:pnSYS-E300-8D:pvr0123456789:rvnSupermicro:rnX10SDV-TP8F:rvr1.01:cvnSupermicro:ct1:cvr0123456789:skuTobefilledbyO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: SYS-E300-8D
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 0123456789
dmi.sys.vendor: Supermicro

[Nick Rogers (tsp435cds)]

Please refer to the many Call Trace messages in CurrentDmesg.txt.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Juerg Haefliger (juergh)]

Fixed by https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/commit/?h=master-next&id=352a39407e5bab5a5965e5bcb7abf1f3e1e34f7f

[Nick Rogers (tsp435cds)]

Thank you all!