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Kernel OOPS caused by unmounting thumb drive
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kai.scorpio
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PostPosted: Thu Feb 28, 2013 1:33 pm    Post subject: Kernel OOPS caused by unmounting thumb drive Reply with quote

Hi all,

I ran into a bug, when I unmount a USB flash drive (it seems to be this specific drive) I get a kernel oops. Here is the relevant section of /var/log/messages, though the bit pasted in below is probably the relevant one: http://pastebin.com/USxybPMv
Code:

Feb 28 11:27:35 kai-laptop kernel: [17874.835102] sd 8:0:0:0: [sdb] Attached SCSI removable disk
Feb 28 11:34:21 kai-laptop kernel: [18281.349286] VFS: Busy inodes after unmount of sdb1. Self-destruct in 5 seconds.  Have a nice day...
Feb 28 11:34:21 kai-laptop kernel: [18281.349340] BUG: unable to handle kernel NULL pointer dereference at 00000000000000f8
Feb 28 11:34:21 kai-laptop kernel: [18281.349390] IP: [<ffffffff8102fc59>] __ticket_spin_lock+0x9/0x30
Feb 28 11:34:21 kai-laptop kernel: [18281.349427] PGD 1162de067 PUD 11865f067 PMD 0
Feb 28 11:34:21 kai-laptop kernel: [18281.349462] Oops: 0002 [#1] SMP
Feb 28 11:34:21 kai-laptop kernel: [18281.349487] Modules linked in: nouveau ttm drm_kms_helper hid_logitech_dj mxm_wmi wmi kvm_intel kvm


uname -a
Code:
Linux kai-laptop 3.6.11-gentoo #3 SMP Fri Jan 25 08:39:48 GMT 2013 x86_64 Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz GenuineIntel GNU/Linux


I am using KDE 4.9.3, and mounting and unmounting the drive via the 'removable disks' plasmid thingy.

Any other information you guys need? It's not a huge problem since it seems to be restricted to this drive and only happens occasionally, but this seems like it could be important...

Kai
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eyoung100
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PostPosted: Thu Feb 28, 2013 5:56 pm    Post subject: Reply with quote

Code:
VFS: Busy inodes after unmount of sdb1. Self-destruct in 5 seconds.  Have a nice day...


The disk was still being written to when you unmounted it. Your Virtual File Server did what it said it would do, waited 5 seconds and crashed...

It's being written to only by one or all of the modules linked in

Nouveau is the module for the new Open Source video driver for nvidia
TTM is the module for translation-table maps which is a way of managing memory for Graphics Cards.
DRM_KMS_Helper is the module for Digital Rendering Mode_Kernel Mode Setting - this allows graphics cards to swap resolutions easier on the fly in the console.
hid_logitech is your mouse/touchpad driver
mxm_wmi - "WMI support for MXM Laptop Graphics" - MXM is a standard for laptop graphics cards, the WMI interface is required for switchable nvidia graphics machines
WMI Adds ACPI Support - Power Management
KVM_intel is the intel driver for Kernel Virtual Mode
KVM is the Virtual Mode Driver

Are you using a VM??
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kai.scorpio
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PostPosted: Sun Mar 03, 2013 8:11 pm    Post subject: Reply with quote

No, I am not using a VM at the moment, though I have one set up. This is just a standard USB flash drive I use to take some files to work, and on unmounting it I got a kernel oops. Does that help?

Kai
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