Public bug reported: Device is an Adafruit microcontroller board running https://github.com/adafruit/circuitpython, using the TinyUSB USB stack: https://github.com/hathach/tinyusb.
Device presents a composite USB device that includes MSC, CDC, HID, and MIDI Device was commanded to forcibly reformat its MSC FAT12 filesystem and then reset, which causes a USB reset and re-enumeration. This causes some USB kernel code to crash, much of the time, though not quite all the time. I work for Adafruit and the maintainer of TinyUSB also works for Adafruit, so we can provide further help to track this down. Attached is the dmesg file for the crash. I tried uploading the dump file from kdump, but launchpad is timing out. The dump file is available at: https://drive.google.com/open?id=1ka3ySSccEMRSmnYgI9X16IndPDmIKTD6 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-21-generic 5.4.0-21.25 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: halbert 1857 F.... pulseaudio /dev/snd/controlC2: halbert 1857 F.... pulseaudio CurrentDesktop: X-Cinnamon Date: Mon Apr 6 11:09:43 2020 HibernationDevice: RESUME=UUID=55694d39-bafe-45f8-ba05-ea5d54a93a85 InstallationDate: Installed on 2017-09-19 (929 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) IwConfig: eno1 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. OptiPlex 7010 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=UUID=b3868153-c620-4efe-9dfc-8059dc6288a8 ro quiet splash crashkernel=512M-:192M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-21-generic N/A linux-backports-modules-5.4.0-21-generic N/A linux-firmware 1.187 RfKill: 0: hci0: Bluetooth Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to focal on 2020-03-08 (28 days ago) dmi.bios.date: 06/28/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: A29 dmi.board.name: 0WR7PY dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 15 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA29:bd06/28/2018:svnDellInc.:pnOptiPlex7010:pvr01:rvnDellInc.:rn0WR7PY:rvrA01:cvnDellInc.:ct15:cvr: dmi.product.name: OptiPlex 7010 dmi.product.sku: OptiPlex 7010 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal ** Attachment added: "dmesg file from kdump" https://bugs.launchpad.net/bugs/1871143/+attachment/5347818/+files/dmesg.202004061013 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871143 Title: Kernel crash during USB device enumeration or mounting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871143/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
