After some Internet research it seems this issue is already fixed in mainline kernel: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9cf94eab8b309e8bcc78b41dd1561c75b537dd0b
I will try to cherry-pick to latest ubuntu kernel and report back the results. -- 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/1503902 Title: Network stops working after inserting nf_conntrack.ko to kernel Status in linux package in Ubuntu: Confirmed Bug description: While evaluating Wily for further use I found that after random period of time Internet connection drops (while IP stack is configured properly) and system message log gets quickly filled with following messages: Oct 07 14:06:25 hikari kernel: nf_conntrack: table full, dropping packet Oct 07 14:06:26 hikari kernel: nf_conntrack: table full, dropping packet Problem occurs only if I manually load nf_conntrack or related kernel modules or start Shorewall (which loads nf_conntrack obviously). Removing nf_conntrack and nf_conntrack and dependent modules fixes problem and restores Internet connection. With older builds of linux kernel (4.1.0-*) everything works as expected. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-14-generic 4.2.0-14.16 ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2 Uname: Linux 4.2.0-14-generic x86_64 ApportVersion: 2.19.1-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: blami 1805 F.... pulseaudio CurrentDesktop: Unity Date: Wed Oct 7 23:56:46 2015 MachineType: LENOVO 2325DV5 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-14-generic root=UUID=ac8f53c6-5a42-45b3-aa74-4237647b3936 ro rootflags=subvol=@ quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-14-generic N/A linux-backports-modules-4.2.0-14-generic N/A linux-firmware 1.148 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 03/05/2013 dmi.bios.vendor: LENOVO dmi.bios.version: G2ETA0WW (2.60 ) dmi.board.asset.tag: Not Available dmi.board.name: 2325DV5 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG2ETA0WW(2.60):bd03/05/2013:svnLENOVO:pn2325DV5:pvrThinkPadX230:rvnLENOVO:rn2325DV5:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2325DV5 dmi.product.version: ThinkPad X230 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1503902/+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
