We cannot unfortunately test upstream kernel due to a regression in recent kernels we couldn't track yet (in connections bridging). Furthermore, this crash happened only once in several months in production. And finally, this is a production server on which we're pretty not willing doing tests. It has to remain stable.
** Tags added: kernel-unable-to-test-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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/1352794 Title: Null pointer dereference in mmu_set_spte.isra on 3.8.0-33-generic Status in “linux” package in Ubuntu: Confirmed Bug description: Dear all, We faced a kernel oops on KVM from a null pointer derefence on one of our hypervisors (running several KVM VMs). This led us to a serie of kernel oops affecting all the VMs and finally, the host crash. We couldn't really establish where from the first oops was comming (in order to reproduce the crash). You'll find attach the extract of syslog where you have the really first oops, and all the followings. We're using Ubuntu 12.04LTS. We're using latest releases available on it, including for KVM. We're using kernel 3.8 due to hardware constraints. And we're using kernel 3.8.0-33-generic due to regressions in newer kernels (not yet reported). --- AlsaDevices: total 0 crw-rw---T 1 root audio 116, 1 Aug 4 14:07 seq crw-rw---T 1 root audio 116, 33 Aug 4 14:07 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 12.04 HibernationDevice: RESUME=UUID=27b2f2d3-0ec2-4f22-9f6d-c857b6830ab6 InstallationMedia: IwConfig: Error: [Errno 2] No such file or directory MachineType: MSI MS-7816 MarkForUpload: True Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-33-generic root=UUID=4ee4d8b4-6b60-4800-b449-a22259277145 ro quiet elevator=deadline ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11 RelatedPackageVersions: linux-restricted-modules-3.8.0-33-generic N/A linux-backports-modules-3.8.0-33-generic N/A linux-firmware 1.79.16 RfKill: Error: [Errno 2] No such file or directory Tags: precise Uname: Linux 3.8.0-33-generic x86_64 UpgradeStatus: Upgraded to precise on 2012-05-10 (817 days ago) UserGroups: WifiSyslog: Aug 5 06:25:17 rose kernel: [58628.862288] device eth0 left promiscuous mode Aug 5 06:25:33 rose kernel: [58644.253374] device eth0 entered promiscuous mode dmi.bios.date: 08/23/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V2.14B6 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H87-G43 (MS-7816) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.14B6:bd08/23/2013:svnMSI:pnMS-7816:pvr1.0:rvnMSI:rnH87-G43(MS-7816):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7816 dmi.product.version: 1.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1352794/+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