I saw that 3.11.0-15 included a couple of backported fixes for shm races, including one (8380e1f50d3640498a3fec272ce32199de788a2d) that described my bug nearly exactly. I've been testing this kernel for the last couple of days, and have been unable to reproduce the kernel oops, so I think we can call this bug closed.
-- 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/1249719 Title: Kernel oops - BUG: unable to handle kernel NULL pointer dereference at 0000000000000030; IP: [<ffffffff811c07c7>] touch_atime+0x17/0x140 Status in “linux” package in Ubuntu: Confirmed Bug description: Since 3.11.0-13-generic, I've been encountering the following kernel oops. I can trigger it quite reliably by watching full-screen videos on YouTube using google-chrome (Version 31.0.1650.48) for roughly 10 minutes. Once the oops happens, the system remains up, but certain programs (like top) start hanging and a reboot is needed to restore full functionality. I've tried using 3.12.0-999-generic (3.12.0-999.201311080433), but get the same problem there. I don't get the oops when booting into 3.11.0-12-generic, so I suspect the problem was introduced in 3.11.0-13-generic (especially since I see there were some changes made related to the shmat system call). Attached is the oops from dmesg. The EIP location and stack-trace are identical for all the oops I've seen so far. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-13-generic 3.11.0-13.20 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 Uname: Linux 3.11.0-13-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: rick 1421 F.... pulseaudio /dev/snd/controlC1: rick 1421 F.... pulseaudio /dev/snd/controlC0: rick 1421 F.... pulseaudio Date: Sat Nov 9 23:24:33 2013 HibernationDevice: RESUME=UUID=0ad92a6e-2969-424f-b469-faaa9f2ec20f InstallationDate: Installed on 2012-10-19 (387 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. X58A-UD3R MarkForUpload: True ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=cf7d6665-f4a9-4be8-a12d-c72a985ea5eb ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-13-generic N/A linux-backports-modules-3.11.0-13-generic N/A linux-firmware 1.116 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to saucy on 2013-10-19 (22 days ago) dmi.bios.date: 03/11/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F5 dmi.board.name: X58A-UD3R dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd03/11/2010:svnGigabyteTechnologyCo.,Ltd.:pnX58A-UD3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX58A-UD3R:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: X58A-UD3R dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1249719/+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
