Ad this seems to be reproducible we might want to spin up one of the affected machines with a 4K kernel and see if that avoids the issue. Of course as we have seen with other bugs, assumptions in the client s/w may be to blame.
-- 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/1301496 Title: kernel crash: Unable to handle kernel paging request for data Status in “linux” package in Ubuntu: Confirmed Bug description: We've seen this happen twice now on ppc64el guests that are probably under load. I don't have a lot of the details on what was going on when they failed, but I have the stack traces. [101168.836780] Unable to handle kernel paging request for data at address 0x00010001 [101168.836886] Faulting instruction address: 0xc000000000954b60 [101168.836934] Oops: Kernel access of bad area, sig: 11 [#1] [101168.836971] SMP NR_CPUS=2048 NUMA pSeries [101168.837020] Modules linked in: veth xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables dm_crypt [101168.837234] CPU: 1 PID: 19760 Comm: kworker/u4:0 Not tainted 3.13.0-8-generic #28-Ubuntu [101168.837294] Workqueue: netns .cleanup_net [101168.837332] task: c0000003f99d43e0 ti: c0000001cce44000 task.ti: c0000001cce44000 [101168.837386] NIP: c000000000954b60 LR: c000000000954b68 CTR: c000000000954b00 [101168.837439] REGS: c0000001cce47760 TRAP: 0300 Not tainted (3.13.0-8-generic) [101168.837493] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 24002024 XER: 00000000 [101168.837620] CFAR: 000000001063ea4c DAR: 0000000000010001 DSISR: 40000000 SOFTE: 1 GPR00: c000000000954b68 c0000001cce479e0 c0000000010b0dd0 0000000000010001 GPR04: f0000000099918f0 c0000002be072380 c000000000954b68 c0000003fe023508 GPR08: 0000000000010000 c000000209fc0000 000000000000000e 0000000000000001 GPR12: 0000000044002028 c00000000fe80300 c0000000000c3f00 c0000002be1e8bc0 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000001 c000000000f630fc GPR24: 0000000000000001 fffffffffffffef7 0000000000000000 c000000000f58638 GPR28: 0000000000000001 c0000003fbdc0000 0000000000002000 0000000000000000 [101168.838355] NIP [c000000000954b60] .tcp_net_metrics_exit+0x60/0x110 [101168.838402] LR [c000000000954b68] .tcp_net_metrics_exit+0x68/0x110 [101168.838448] Call Trace: [101168.838469] [c0000001cce479e0] [c000000000954b68] .tcp_net_metrics_exit+0x68/0x110 (unreliable) [101168.838542] [c0000001cce47a70] [c0000000008cc49c] .ops_exit_list.isra.2+0x6c/0xd0 [101168.838605] [c0000001cce47b00] [c0000000008ccef0] .cleanup_net+0x150/0x250 [101168.838662] [c0000001cce47bc0] [c0000000000b9e28] .process_one_work+0x1a8/0x4d0 [101168.838726] [c0000001cce47c60] [c0000000000baaf0] .worker_thread+0x180/0x4a0 [101168.838783] [c0000001cce47d30] [c0000000000c4010] .kthread+0x110/0x130 [101168.838841] [c0000001cce47e30] [c00000000000a160] .ret_from_kernel_thread+0x5c/0x7c [101168.838903] Instruction dump: [101168.838940] 7d295030 2f890000 e93d0288 419e0058 3bc00000 3b800001 60000000 60420000 [101168.839031] 7bc81f24 7c69402a 2fa30000 419e0024 <ebe30000> 4b8b809d 60000000 2fbf0000 [101168.839127] ---[ end trace fb028b2b5c006a6a ]--- --- AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14-0ubuntu1 Architecture: ppc64el ArecordDevices: Error: [Errno 2] No such file or directory CRDA: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 14.04 Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinux-3.13.0-19-generic root=UUID=19eaa2f9-0f24-49b9-ba48-24879242481c ro console=hvc0 earlyprintk ProcVersionSignature: User Name 3.13.0-19.40-generic 3.13.6 RelatedPackageVersions: linux-restricted-modules-3.13.0-19-generic N/A linux-backports-modules-3.13.0-19-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory Tags: trusty uec-images Uname: Linux 3.13.0-19-generic ppc64le UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dialout dip floppy netdev plugdev sudo video WifiSyslog: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1301496/+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
