** Description changed: + [Impact] + + Developers are unable to unable to use kernel tracing functions on + kernel modules they have themselves compiled. This makes Ubuntu a poor + platform for module developement and debugging. + + [Test Case] + + Build an OOT or modified version of a module, insert it and notice that + tracing becomes disabled. Apply updated kernel and confirm the same + does not occur. + + [Regression Potential] + + This only changes the taint infrastructure to introduce a single new + flag. Should be very low risk. + + === + The issue is explained in detail at http://lwn.net/Articles/588799/ I am trying to load a backported drm module using dkms. It is not signed so is listed as tainted and trace points are disabled. As explained in the above article this is because the TAINT_FORCED MODULE flag is incorrectly set for unsigned modules. The final patch to fix this and add a TAINT_UNSIGNED_MODULE that does not disable trace points can be found at http://lwn.net/Articles/588803/ (fixed in 3.15) Please consider shipping this patch. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-34-generic 3.13.0-34.60 ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4 Uname: Linux 3.13.0-34-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: badger 2013 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: badger 2013 F.... pulseaudio CurrentDesktop: Unity Date: Thu Aug 21 11:28:15 2014 HibernationDevice: RESUME=UUID=21f8f6b4-495d-4bc6-8dec-1f78435d4b95 InstallationDate: Installed on 2014-06-30 (51 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: LENOVO 0301CTO ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-34-generic root=UUID=d56caf05-a203-436f-8497-b8a37294fe8a ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.13.0-34-generic N/A - linux-backports-modules-3.13.0-34-generic N/A - linux-firmware 1.127.5 + linux-restricted-modules-3.13.0-34-generic N/A + linux-backports-modules-3.13.0-34-generic N/A + linux-firmware 1.127.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/14/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 80ET42WW (1.19 ) dmi.board.name: 0301CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr80ET42WW(1.19):bd10/14/2010:svnLENOVO:pn0301CTO:pvrThinkPadEdge:rvnLENOVO:rn0301CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 0301CTO dmi.product.version: ThinkPad Edge dmi.sys.vendor: LENOVO
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1359670 Title: Unsigned oot modules are wrongly tainted and trace events disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
