apport information ** Tags added: apport-collected xenial
** Description changed: While playing around with the CDROM API found in linux/cdrom.h I encountered a kernel oops when my program stalls. My code can be found at https://github.com/bigdavedev/audiorip. My program simply examines the ToC and then begins reading the PCM data track-by-track. I would expect it to complete without any major issue At first I assumed it was the CD, but after switching CDs several times I noticed that the oops happens at around frame 170925, reading CD_FRAMES (75) per ioctl. At this point, the disc is spinning at full speed. I have not yet tried reading fewer frames, nor have I tried setting the speed to something not max to see if I still receive a kernel oops. This would not be problematic to try. I have attached the output from `ubuntu-bug linux` to this issue. + --- + ApportVersion: 2.20.1-0ubuntu2 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: dabr 2430 F.... pulseaudio + DistroRelease: Ubuntu 16.04 + EcryptfsInUse: Yes + InstallationDate: Installed on 2016-01-29 (102 days ago) + InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) + MachineType: ASUSTeK COMPUTER INC. K55VD + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic.efi.signed root=/dev/mapper/primary_lvm_volume-root ro + ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8 + RelatedPackageVersions: + linux-restricted-modules-4.4.0-22-generic N/A + linux-backports-modules-4.4.0-22-generic N/A + linux-firmware 1.157 + RfKill: Error: [Errno 2] No such file or directory + Tags: xenial + Uname: Linux 4.4.0-22-generic x86_64 + UpgradeStatus: Upgraded to xenial on 2016-04-19 (22 days ago) + UserGroups: adm audio bumblebee cdrom dialout dip kvm lpadmin plugdev sambashare sudo video + _MarkForUpload: True + dmi.bios.date: 03/11/2013 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: K55VD.411 + dmi.board.asset.tag: ATN12345678901234567 + dmi.board.name: K55VD + dmi.board.vendor: ASUSTeK COMPUTER INC. + dmi.board.version: 1.0 + dmi.chassis.asset.tag: No Asset Tag + dmi.chassis.type: 10 + dmi.chassis.vendor: ASUSTeK COMPUTER INC. + dmi.chassis.version: 1.0 + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrK55VD.411:bd03/11/2013:svnASUSTeKCOMPUTERINC.:pnK55VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnK55VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: + dmi.product.name: K55VD + dmi.product.version: 1.0 + dmi.sys.vendor: ASUSTeK COMPUTER INC. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1580776/+attachment/4660925/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1580776 Title: Kernel Oops - unable to handle kernel NULL pointer dereference at 0000000000000002; IP is at mmc_ioctl_cdrom_read_audio+0x212/0x3b0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1580776/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
