This change was made by a bot. ** Changed in: linux (Ubuntu) Status: New => Confirmed
-- 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/1905994 Title: failure to set dtr/rts on USB VCP causes kernel page fault Status in linux package in Ubuntu: Confirmed Bug description: attempting to reproduce bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1905782 on ubuntu 20.04.1 LTS yields a kernel OOOPS / page fault in the USB cdc_acm driver. will upload OOOPs shortly. steps to reproduce: 1. boot ubuntu 20.04.1 LTS (In this case from live CD) 2. plug in a USB device with a virtual com port 3. configure the TTY assigned (/dev/ttyACM0) setting dtr/rts (for example with minicom) 4. device does not support setting dtr/rts expected result: error message actual result: error message plus page fault in kernel space plus system becoming unstable will upload and attach dmesg log as soon as I managed to log the oops ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-42-generic 5.4.0-42.46 ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44 Uname: Linux 5.4.0-42-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 4492 F.... pulseaudio CasperMD5CheckMismatches: ./casper/filesystem.squashfs CasperMD5CheckResult: skip CasperVersion: 1.445.1 CurrentDesktop: ubuntu:GNOME Date: Fri Nov 27 17:37:22 2020 LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) MachineType: FUJITSU LIFEBOOK E736 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/username.seed maybe-ubiquity quiet splash --- RelatedPackageVersions: linux-restricted-modules-5.4.0-42-generic N/A linux-backports-modules-5.4.0-42-generic N/A linux-firmware 1.187.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/20/2016 dmi.bios.vendor: FUJITSU // Insyde Software Corp. dmi.bios.version: Version 1.22 dmi.board.name: FJNB293 dmi.board.vendor: FUJITSU dmi.board.version: M4 dmi.chassis.type: 10 dmi.chassis.vendor: FUJITSU dmi.chassis.version: LIFEBOOK E736 dmi.modalias: dmi:bvnFUJITSU//InsydeSoftwareCorp.:bvrVersion1.22:bd12/20/2016:svnFUJITSU:pnLIFEBOOKE736:pvr10601115935:rvnFUJITSU:rnFJNB293:rvrM4:cvnFUJITSU:ct10:cvrLIFEBOOKE736: dmi.product.family: LIFEBOOK-FTS dmi.product.name: LIFEBOOK E736 dmi.product.version: 10601115935 dmi.sys.vendor: FUJITSU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1905994/+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