Alas, the exact same result on the exact same frame in the upstream
mainline kernel...
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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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
Status in linux package in Ubuntu:
Confirmed
Bug description:
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.
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