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/1380444 Title: xhci locks up computer with NULL pointer dereference trying to wake up external USB3 disk Status in “linux” package in Ubuntu: Confirmed Bug description: In Ubuntu 14.10, my laptop locks up completely when trying to wake my WD 1230 USB3 external hard drive from its default 10-minute standby. The system tries to wake up the drive, which is unsuccessful, and after a few seconds uas_eh_abort_handler gets called. Shortly after this the NULL pointer dereference occurs in xhci_alloc_streams or xhci_check_streams_endpoint (most times the NULL pointer dereference error doesn't even get persisted to disk, so there may be other points where it occurs). Not long after this the laptop locks up completely and both it and the hard drive have to be power-cycled. I can put the drive manually into and out of standby using hdparm, so I guess there are two problems: one which makes the drive crash (ie it must crash because it needs to be power cycled) and the other being the NULL pointer dereference and complete kernel lockup. The last good kernel was 3.15-rc4. All kernels since since have this problem, including the latest upstream kernel. I did a git bisect, which says: The merge base 6d4596905b65bf4c63c1a008f50bf385fa49f19b is bad. This means the bug has been fixed between 6d4596905b65bf4c63c1a008f50bf385fa49f19b and [89ca3b881987f5a4be4c5dbaa7f0df12bbdde2fd] I have reported this upstream at https://bugzilla.kernel.org/show_bug.cgi?id=85741. More details including the logs showing the error ocurring are there. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-22-generic 3.16.0-22.29 ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4 Uname: Linux 3.16.0-22-generic x86_64 ApportVersion: 2.14.7-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: rocko 3333 F.... pulseaudio CurrentDesktop: Unity Date: Mon Oct 13 10:15:41 2014 HibernationDevice: RESUME=UUID=ca164267-edcd-4d3c-b325-acbd60802e7a InstallationDate: Installed on 2014-02-08 (246 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140207) MachineType: Dell Inc. Dell System XPS L502X ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.16.0-22-generic root=UUID=3e785733-7f93-4ea8-8cdd-c42606029905 ro rootflags=subvol=@ quiet splash init=/lib/systemd/systemd vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-22-generic N/A linux-backports-modules-3.16.0-22-generic N/A linux-firmware 1.135 SourcePackage: linux UpgradeStatus: Upgraded to utopic on 2014-10-04 (8 days ago) dmi.bios.date: 05/29/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A11 dmi.board.name: 0NJT03 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L502X dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1380444/+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