Launchpad has imported 12 comments from the remote bug at https://bugzilla.redhat.com/show_bug.cgi?id=706574.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2011-05-21T07:58:48+00:00 cam wrote: Description of problem: Whilst investigating problems related to https://bugzilla.redhat.com/show_bug.cgi?id=697157 I unloaded the hp_wmi module, then the wmi module. The system locked up, the screen changed to a plain console and an oops message was printed. I recovered this from the log after power cycling (the machine wasn't responding) Version-Release number of selected component (if applicable): kernel-2.6.38.6-27.fc15.i686 How reproducible: 100% Steps to Reproduce: 1. boot to normal system 2. rmmod hp_wmi 3. rmmod wmi Actual results: black screen / console, oops message and system is locked up Expected results: module should be removable or give error message. Additional info: May be related to BZ 697157 where the ath9k module can't unload (and locks up spontaneously too) Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/0 ------------------------------------------------------------------------ On 2011-05-21T08:10:51+00:00 cam wrote: Created attachment 500172 log messages from boot to eventual Oops Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/1 ------------------------------------------------------------------------ On 2011-10-06T15:40:42+00:00 Josh wrote: Do you still get this error with the 2.6.40.x updates in F15? Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/2 ------------------------------------------------------------------------ On 2011-10-07T10:38:50+00:00 Stefan wrote: modprobe -r wmi on 2.6.40.6 still oopses. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/3 ------------------------------------------------------------------------ On 2011-10-17T07:40:16+00:00 Stefan wrote: also still happens with f16 beta Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/4 ------------------------------------------------------------------------ On 2011-10-17T14:04:51+00:00 Chuck wrote: (In reply to comment #4) > also still happens with f16 beta Please post traces from f15 and/or f16 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/5 ------------------------------------------------------------------------ On 2011-10-17T14:49:26+00:00 Stefan wrote: Created attachment 528559 screenshot.jpg The system is inoperable after module unload so I could only take a screenshot. f16 kernel-3.1.0.0.rc9 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/6 ------------------------------------------------------------------------ On 2011-11-02T10:53:17+00:00 Peter wrote: Created attachment 531313 Part of kernel log after Oops It happens on Kubuntu 11.10 Oneiric too $ uname -a Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux For some reason, device->kobj is NULL sysfs_find_dirent: http://lxr.linux.no/#linux+v3.1/fs/sysfs/dir.c#L539 sysfs_get_dirent: http://lxr.linux.no/#linux+v3.1/fs/sysfs/dir.c#L575 sysfs_unmerge_group: http://lxr.linux.no/#linux+v3.1/fs/sysfs/group.c#L195 (rpm_sysfs_remove: http://lxr.linux.no/#linux+v3.1/drivers/base/power/sysfs.c#L534) dpm_sysfs_remove: http://lxr.linux.no/#linux+v3.1/drivers/base/power/sysfs.c#L539 device_del: http://lxr.linux.no/#linux+v3.1/drivers/base/core.c#L1098 device_unregister: http://lxr.linux.no/#linux+v3.1/drivers/base/core.c#L1152 Could the patch at have fixed this? http://git.kernel.org/?p=linux/kernel/git/next/linux-next-history.git;a=commitdiff;h=023b9565972a4a5e0f01b9aa32680af6e9b5c388 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/7 ------------------------------------------------------------------------ On 2011-11-02T13:04:40+00:00 Josh wrote: (In reply to comment #7) > Could the patch at have fixed this? > http://git.kernel.org/?p=linux/kernel/git/next/linux-next-history.git;a=commitdiff;h=023b9565972a4a5e0f01b9aa32680af6e9b5c388 Possibly. That commit should be in the most recent rawhide kernel. If someone is willing to test that, it would be appreciated. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/8 ------------------------------------------------------------------------ On 2011-11-02T13:44:20+00:00 Peter wrote: I've built the module using a custom Makefile and tested it. I can confirm that the NULL BUG() has disappeared. Tests: ubuntu@ubuntu:~$ sudo modprobe -v wmi insmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko ubuntu@ubuntu:~$ sudo modprobe -v -r wmi rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko ubuntu@ubuntu:~$ sudo modprobe -v mxm-wmi insmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko insmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/mxm-wmi.ko ubuntu@ubuntu:~$ sudo modprobe -v -r mxm-wmi rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/mxm-wmi.ko rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko ubuntu@ubuntu:~$ sudo modprobe -v nouveau insmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko insmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/mxm-wmi.ko insmod /lib/modules/3.0.0-12-generic/kernel/drivers/gpu/drm/ttm/ttm.ko insmod /lib/modules/3.0.0-12-generic/kernel/drivers/gpu/drm/nouveau/nouveau.ko ubuntu@ubuntu:~$ sudo modprobe -v -r nouveau rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/gpu/drm/nouveau/nouveau.ko rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/gpu/drm/ttm/ttm.ko rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/mxm-wmi.ko rmmod /lib/modules/3.0.0-12-generic/kernel/drivers/platform/x86/wmi.ko No Oopses anymore. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/9 ------------------------------------------------------------------------ On 2011-11-02T13:47:25+00:00 Josh wrote: (In reply to comment #9) > I've built the module using a custom Makefile and tested it. I can confirm > that > the NULL BUG() has disappeared. OK. I'll backport the patch to F16 and get it included. Will ship as an update, as it's a bit too late to get this into the release at this point. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/10 ------------------------------------------------------------------------ On 2011-11-02T14:00:28+00:00 Josh wrote: Added to both F15 and F16. Will be in the next kernel builds. Also, this was supposed to head for stable so I pinged GregKH about it as well. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/885243/comments/11 ** Changed in: linux (Fedora) Status: Unknown => Fix Released ** Changed in: linux (Fedora) Importance: Unknown => Undecided ** Bug watch added: Red Hat Bugzilla #697157 https://bugzilla.redhat.com/show_bug.cgi?id=697157 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/885243 Title: "BUG: unable to handle kernel NULL pointer dereference" when unloading wmi To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/885243/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
