Check for NULL pointer per cpu. ** Patch added: "Tested on linux-4.6.2" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1598529/+attachment/4699514/+files/C_NULL_p_update_blocked_averages.patch
-- 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/1598529 Title: On update_blocked_averages function issue Status in linux package in Ubuntu: Triaged Bug description: Bellow is result of perf report: .............................. │ cmp %rax,%r15 ▒ │ ↓ je 398 ▒ │ lea -0xd8(%rax),%rbx ▒ │ mov %r14,0x8(%rsp) ▒ │ movabs $0xafb504000afb5041,%r8 ▒ │ mov %r15,%r14 ▒ │ 71: nop ▒ │ mov 0x124(%rbx),%r11d ▒ 26,56 │ test %r11d,%r11d ▒ │ ↓ jne 426 ▒ │ 86: mov 0xc8(%rbx),%rax ▒ 17,97 │ mov 0x910(%rax),%rax ▒ 1,56 │ sub 0x118(%rbx),%rax ▒ │ 9b: mov 0xa0(%rbx),%rdx ▒ 12,50 │ xor %r15d,%r15d ▒ │ test %rdx,%rdx ▒ │ ↓ je ea ▒ │ xor %ecx,%ecx ▒ │ mov %rcx,%rdx ▒ │ xchg %rdx,0xa0(%rbx) ▒ │ sub %rdx,0x78(%rbx) ▒ │ mov %rcx,%rsi ▒ │ mov $0x1,%r15d ▒ │ cmpq $0x0,0x78(%rbx) ................................. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-28-generic 4.4.0-28.47 ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13 Uname: Linux 4.4.0-28-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: asu 2987 F.... pulseaudio CurrentDesktop: MATE Date: Sun Jul 3 07:49:32 2016 InstallationDate: Installed on 2016-04-29 (64 days ago) InstallationMedia: Ubuntu-Studio 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) IwConfig: lo no wireless extensions. enp1s0 no wireless extensions. MachineType: Olidata S.p.A. ALABAMA ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-28-generic root=/dev/mapper/192--168--0--108--vg-root ro RelatedPackageVersions: linux-restricted-modules-4.4.0-28-generic N/A linux-backports-modules-4.4.0-28-generic N/A linux-firmware 1.157.1 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/08/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: S0101 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: To be filled by O.E.M. dmi.board.vendor: To be filled by O.E.M. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS0101:bd07/08/2008:svnOlidataS.p.A.:pnALABAMA:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: ALABAMA dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: Olidata S.p.A. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1598529/+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