That is good news. That means Bionic should get the fix through the normal stable update process.
The current Bionic -proposed kernel(4.15.0-13) has up to the 4.15.10 updates applied. It might be worth testing the proposed kernel to see if we already have the fix and don't have to wait for the 4.15.11 or 4.15.12 upstream updates. -- 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/1757217 Title: Behaviour change in reading /proc/modules could cause issues in userspace tools Status in linux package in Ubuntu: Confirmed Status in linux source package in Bionic: Confirmed Bug description: This was discovered while investigating tracebacks in the cert suite. We have a script that parses /proc/modules and returns the information in a more human-readable format as part of the info gathering we do during cert testing. On 4.13 and older kernels, this script was run as a normal user with no error. On 4.15, this script dumps a python trace because /proc/modules now returns a null reference instead of just a blank memory offset. On 4.13 and older, when you read the file, you get something like this (root and non-root shown): bladernr@galactica:~$ sudo cat /proc/modules |grep nls_iso8859 nls_iso8859_1 16384 1 - Live 0xffffffffc06b5000 bladernr@galactica:~$ cat /proc/modules |grep nls_iso8859 nls_iso8859_1 16384 1 - Live 0x0000000000000000 Note that non-root reading returns a memory offset of 0x0 which is easily parsable. Now, on 4.15, this has changed: ubuntu@xwing:~$ sudo cat /proc/modules |grep e1000e e1000e 249856 0 - Live 0xffffffffc0225000 ptp 20480 2 igb,e1000e, Live 0xffffffffc00a9000 ubuntu@xwing:~$ cat /proc/modules |grep e1000e e1000e 249856 0 - Live 0x (null) ptp 20480 2 igb,e1000e, Live 0x (null) Now, however, non-root reading returns a null reference which causes attempts to parse the offset to fail. I imagine this is probably by design, and it's a minor bug, but I wanted to raise it as it could cause issues when running userspace tools that parse /proc/modules on 4.15. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-12-generic 4.15.0-12.13 ProcVersionSignature: User Name 4.15.0-12.13-generic 4.15.7 Uname: Linux 4.15.0-12-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Mar 20 17:24 seq crw-rw---- 1 root audio 116, 33 Mar 20 17:24 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Tue Mar 20 17:59:51 2018 MachineType: LENOVO INVALID PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic.efi.signed root=UUID=9fdf32ba-26ce-4d54-8457-dbd62057c7e9 ro RelatedPackageVersions: linux-restricted-modules-4.15.0-12-generic N/A linux-backports-modules-4.15.0-12-generic N/A linux-firmware 1.173 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/07/2017 dmi.bios.vendor: LENOVO dmi.bios.version: FBKT97CUS dmi.board.name: ThinkServer RS140 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.type: 7 dmi.chassis.vendor: LENOVO dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnLENOVO:bvrFBKT97CUS:bd04/07/2017:svnLENOVO:pnINVALID:pvrFFFFFFF:rvnLENOVO:rnThinkServerRS140:rvrNotDefined:cvnLENOVO:ct7:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: INVALID dmi.product.version: FFFFFFF dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1757217/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
