PCManfm Automount Cause Kernel Panic?

Super TWiT · 09-19-2011, 03:23 PM

Hi, everyone,

When I unplug my usb thumbdrive, if PCManFM is running, I receive what looks to be a kernel panic. Here's my syslog file (relevant portion):

Code:

Sep 19 15:55:31 User-P3 kernel: [  607.495973] usb 1-1: USB disconnect, address 3
Sep 19 15:55:31 User-P3 kernel: [  607.508093] ------------[ cut here ]------------
Sep 19 15:55:31 User-P3 kernel: [  607.508141] WARNING: at /build/buildd-linux-2.6_2.6.32-35squeeze2-i386-XoyoyB/linux-2.6-2.6.32/debian/build/source_i386_none/fs/buffer.c:1160 mark_buffer_dirty+0x20/0x7a()
Sep 19 15:55:31 User-P3 kernel: [  607.508152] Hardware name: OptiPlex GX110               
Sep 19 15:55:31 User-P3 kernel: [  607.508157] Modules linked in: isofs nls_utf8 nls_cp437 vfat fat usb_storage i810 i915 drm_kms_helper drm i2c_algo_bit video output ppdev lp fuse loop snd_usb_audio snd_usb_lib snd_intel8x0 snd_seq_midi snd_ac97_codec snd_seq_midi_event snd_rawmidi ac97_bus snd_hwdep snd_pcm uvcvideo snd_seq snd_timer videodev snd_seq_device v4l1_compat snd i2c_i801 intel_rng dcdbas parport_pc soundcore psmouse pcspkr parport rng_core shpchp processor evdev i2c_core button serio_raw snd_page_alloc pci_hotplug ext2 mbcache usbhid hid sg sd_mod sr_mod cdrom crc_t10dif ata_generic ata_piix uhci_hcd thermal libata floppy ehci_hcd 3c59x usbcore thermal_sys scsi_mod mii nls_base [last unloaded: scsi_wait_scan]
Sep 19 15:55:31 User-P3 kernel: [  607.508312] Pid: 134, comm: khubd Not tainted 2.6.32-5-686 #1
Sep 19 15:55:31 User-P3 kernel: [  607.508318] Call Trace:
Sep 19 15:55:31 User-P3 kernel: [  607.508351]  [<c1030709>] ? warn_slowpath_common+0x5e/0x8a
Sep 19 15:55:31 User-P3 kernel: [  607.508361]  [<c103073f>] ? warn_slowpath_null+0xa/0xc
Sep 19 15:55:31 User-P3 kernel: [  607.508371]  [<c10cdef8>] ? mark_buffer_dirty+0x20/0x7a
Sep 19 15:55:31 User-P3 kernel: [  607.508409]  [<cca17329>] ? ext2_sync_fs+0x5e/0x70 [ext2]
Sep 19 15:55:31 User-P3 kernel: [  607.508420]  [<c10cc687>] ? __sync_filesystem+0x51/0x60
Sep 19 15:55:31 User-P3 kernel: [  607.508431]  [<c10d2aa5>] ? fsync_bdev+0x14/0x2b
Sep 19 15:55:31 User-P3 kernel: [  607.508462]  [<c112e71e>] ? invalidate_partition+0x14/0x2a
Sep 19 15:55:31 User-P3 kernel: [  607.508482]  [<c10ede05>] ? del_gendisk+0x26/0xf8
Sep 19 15:55:31 User-P3 kernel: [  607.508505]  [<cc97f00c>] ? sd_remove+0x38/0x69 [sd_mod]
Sep 19 15:55:31 User-P3 kernel: [  607.508531]  [<c11b2f38>] ? __device_release_driver+0x74/0xb7
Sep 19 15:55:31 User-P3 kernel: [  607.508541]  [<c11b3007>] ? device_release_driver+0x15/0x1e
Sep 19 15:55:31 User-P3 kernel: [  607.508550]  [<c11b27f3>] ? bus_remove_device+0x6e/0x87
Sep 19 15:55:31 User-P3 kernel: [  607.508560]  [<c11b1494>] ? device_del+0xfa/0x152
Sep 19 15:55:31 User-P3 kernel: [  607.508612]  [<cc78af60>] ? __scsi_remove_device+0x3f/0x90 [scsi_mod]
Sep 19 15:55:31 User-P3 kernel: [  607.508633]  [<cc7888b4>] ? scsi_forget_host+0x2d/0x4a [scsi_mod]
Sep 19 15:55:31 User-P3 kernel: [  607.508652]  [<cc78367a>] ? scsi_remove_host+0x5e/0xd0 [scsi_mod]
Sep 19 15:55:31 User-P3 kernel: [  607.508672]  [<ccd6f670>] ? quiesce_and_remove_host+0x50/0x82 [usb_storage]
Sep 19 15:55:31 User-P3 kernel: [  607.508685]  [<ccd6f746>] ? usb_stor_disconnect+0x10/0x18 [usb_storage]
Sep 19 15:55:31 User-P3 kernel: [  607.508746]  [<cc7f3bbc>] ? usb_unbind_interface+0x3f/0xb4 [usbcore]
Sep 19 15:55:31 User-P3 kernel: [  607.508758]  [<c11b2f38>] ? __device_release_driver+0x74/0xb7
Sep 19 15:55:31 User-P3 kernel: [  607.508768]  [<c11b3007>] ? device_release_driver+0x15/0x1e
Sep 19 15:55:31 User-P3 kernel: [  607.508777]  [<c11b27f3>] ? bus_remove_device+0x6e/0x87
Sep 19 15:55:31 User-P3 kernel: [  607.508786]  [<c11b1494>] ? device_del+0xfa/0x152
Sep 19 15:55:31 User-P3 kernel: [  607.508807]  [<cc7f168e>] ? usb_disable_device+0x32/0xba [usbcore]
Sep 19 15:55:31 User-P3 kernel: [  607.508829]  [<cc7eda82>] ? usb_disconnect+0x70/0xf8 [usbcore]
Sep 19 15:55:31 User-P3 kernel: [  607.508850]  [<cc7ee7d8>] ? hub_thread+0x521/0xe51 [usbcore]
Sep 19 15:55:31 User-P3 kernel: [  607.508878]  [<c104401e>] ? autoremove_wake_function+0x0/0x2d
Sep 19 15:55:31 User-P3 kernel: [  607.508899]  [<cc7ee2b7>] ? hub_thread+0x0/0xe51 [usbcore]
Sep 19 15:55:31 User-P3 kernel: [  607.508909]  [<c1043dec>] ? kthread+0x61/0x66
Sep 19 15:55:31 User-P3 kernel: [  607.508918]  [<c1043d8b>] ? kthread+0x0/0x66
Sep 19 15:55:31 User-P3 kernel: [  607.508943]  [<c1003d47>] ? kernel_thread_helper+0x7/0x10
Sep 19 15:55:31 User-P3 kernel: [  607.508950] ---[ end trace 5ddf054afea616c8 ]---
Sep 19 15:55:31 User-P3 kernel: [  607.621420] BUG: unable to handle kernel paging request at 003eb000
Sep 19 15:55:31 User-P3 kernel: [  607.621448] IP: [<c1140ce7>] __percpu_counter_add+0x21/0x6d
Sep 19 15:55:31 User-P3 kernel: [  607.621474] *pde = 00000000 
Sep 19 15:55:31 User-P3 kernel: [  607.621482] Oops: 0000 [#1] SMP 
Sep 19 15:55:31 User-P3 kernel: [  607.621490] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/class
Sep 19 15:55:31 User-P3 kernel: [  607.621500] Modules linked in: isofs nls_utf8 nls_cp437 vfat fat usb_storage i810 i915 drm_kms_helper drm i2c_algo_bit video output ppdev lp fuse loop snd_usb_audio snd_usb_lib snd_intel8x0 snd_seq_midi snd_ac97_codec snd_seq_midi_event snd_rawmidi ac97_bus snd_hwdep snd_pcm uvcvideo snd_seq snd_timer videodev snd_seq_device v4l1_compat snd i2c_i801 intel_rng dcdbas parport_pc soundcore psmouse pcspkr parport rng_core shpchp processor evdev i2c_core button serio_raw snd_page_alloc pci_hotplug ext2 mbcache usbhid hid sg sd_mod sr_mod cdrom crc_t10dif ata_generic ata_piix uhci_hcd thermal libata floppy ehci_hcd 3c59x usbcore thermal_sys scsi_mod mii nls_base [last unloaded: scsi_wait_scan]
Sep 19 15:55:31 User-P3 kernel: [  607.621635] 
Sep 19 15:55:31 User-P3 kernel: [  607.621646] Pid: 1335, comm: umount Tainted: G        W  (2.6.32-5-686 #1) OptiPlex GX110               
Sep 19 15:55:31 User-P3 kernel: [  607.621655] EIP: 0060:[<c1140ce7>] EFLAGS: 00010006 CPU: 0
Sep 19 15:55:31 User-P3 kernel: [  607.621663] EIP is at __percpu_counter_add+0x21/0x6d
Sep 19 15:55:31 User-P3 kernel: [  607.621670] EAX: 00000000 EBX: ca9740ec ECX: 00000000 EDX: 00000001
Sep 19 15:55:31 User-P3 kernel: [  607.621677] ESI: cb5ad8a8 EDI: 003eb000 EBP: 00000008 ESP: cab11efc
Sep 19 15:55:31 User-P3 kernel: [  607.621684]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Sep 19 15:55:31 User-P3 kernel: [  607.621693] Process umount (pid: 1335, ti=cab10000 task=ca816ec0 task.ti=cab10000)
Sep 19 15:55:31 User-P3 kernel: [  607.621698] Stack:
Sep 19 15:55:31 User-P3 kernel: [  607.621703]  ca9740ec ca816ec0 cb5ad8a8 00000000 ca9c6100 c108d4d9 00000008 00000000
Sep 19 15:55:31 User-P3 kernel: [  607.621719] <0> c1569f80 c10cde9a c4a7c400 ca9c5000 ca9c5000 cca172b6 ca9c5000 cb994b00
Sep 19 15:55:31 User-P3 kernel: [  607.621734] <0> cca17ae2 ca9c5000 cca1a964 cca1c188 ca9c6100 c10b4e2c cb5ad780 00000003
Sep 19 15:55:31 User-P3 kernel: [  607.621751] Call Trace:
Sep 19 15:55:31 User-P3 kernel: [  607.621789]  [<c108d4d9>] ? account_page_dirtied+0x2f/0x4b
Sep 19 15:55:31 User-P3 kernel: [  607.621814]  [<c10cde9a>] ? __set_page_dirty+0x44/0x82
Sep 19 15:55:31 User-P3 kernel: [  607.621848]  [<cca172b6>] ? ext2_sync_super+0x2e/0x43 [ext2]
Sep 19 15:55:31 User-P3 kernel: [  607.621865]  [<cca17ae2>] ? ext2_put_super+0x3c/0xb3 [ext2]
Sep 19 15:55:31 User-P3 kernel: [  607.621891]  [<c10b4e2c>] ? generic_shutdown_super+0x46/0xc6
Sep 19 15:55:31 User-P3 kernel: [  607.621902]  [<c10b4ec6>] ? kill_block_super+0x1a/0x2c
Sep 19 15:55:31 User-P3 kernel: [  607.621921]  [<c10e36fa>] ? vfs_quota_off+0x0/0xd
Sep 19 15:55:31 User-P3 kernel: [  607.621932]  [<c10b5463>] ? deactivate_super+0x4a/0x5f
Sep 19 15:55:31 User-P3 kernel: [  607.621954]  [<c10c544f>] ? sys_umount+0x2a5/0x2cb
Sep 19 15:55:31 User-P3 kernel: [  607.621973]  [<c1270002>] ? do_page_fault+0x2eb/0x301
Sep 19 15:55:31 User-P3 kernel: [  607.621992]  [<c10030fb>] ? sysenter_do_call+0x12/0x28
Sep 19 15:55:31 User-P3 kernel: [  607.621997] Code: cb 12 00 31 d2 89 d0 5b 5e c3 55 57 56 53 83 ec 04 89 04 24 8b 1c 24 64 a1 54 79 41 c1 8b 6c 24 18 8b 7b 14 03 3c 85 f0 bc 3b c1 <8b> 07 89 c3 89 c6 c1 fe 1f 89 e8 01 d3 11 ce 99 39 d6 7f 15 7c 
Sep 19 15:55:31 User-P3 kernel: [  607.622077] EIP: [<c1140ce7>] __percpu_counter_add+0x21/0x6d SS:ESP 0068:cab11efc
Sep 19 15:55:31 User-P3 kernel: [  607.622089] CR2: 00000000003eb000
Sep 19 15:55:31 User-P3 kernel: [  607.622098] ---[ end trace 5ddf054afea616c9 ]---
Sep 19 15:55:31 User-P3 kernel: [  607.622103] ------------[ cut here ]------------
Sep 19 15:55:31 User-P3 kernel: [  607.622116] WARNING: at /build/buildd-linux-2.6_2.6.32-35squeeze2-i386-XoyoyB/linux-2.6-2.6.32/debian/build/source_i386_none/kernel/exit.c:902 do_exit+0x30/0x5cd()
Sep 19 15:55:31 User-P3 kernel: [  607.622124] Hardware name: OptiPlex GX110               
Sep 19 15:55:31 User-P3 kernel: [  607.622129] Modules linked in: isofs nls_utf8 nls_cp437 vfat fat usb_storage i810 i915 drm_kms_helper drm i2c_algo_bit video output ppdev lp fuse loop snd_usb_audio snd_usb_lib snd_intel8x0 snd_seq_midi snd_ac97_codec snd_seq_midi_event snd_rawmidi ac97_bus snd_hwdep snd_pcm uvcvideo snd_seq snd_timer videodev snd_seq_device v4l1_compat snd i2c_i801 intel_rng dcdbas parport_pc soundcore psmouse pcspkr parport rng_core shpchp processor evdev i2c_core button serio_raw snd_page_alloc pci_hotplug ext2 mbcache usbhid hid sg sd_mod sr_mod cdrom crc_t10dif ata_generic ata_piix uhci_hcd thermal libata floppy ehci_hcd 3c59x usbcore thermal_sys scsi_mod mii nls_base [last unloaded: scsi_wait_scan]
Sep 19 15:55:31 User-P3 kernel: [  607.622246] Pid: 1335, comm: umount Tainted: G      D W  2.6.32-5-686 #1
Sep 19 15:55:31 User-P3 kernel: [  607.622251] Call Trace:
Sep 19 15:55:31 User-P3 kernel: [  607.622276]  [<c1030709>] ? warn_slowpath_common+0x5e/0x8a
Sep 19 15:55:31 User-P3 kernel: [  607.622287]  [<c103073f>] ? warn_slowpath_null+0xa/0xc
Sep 19 15:55:31 User-P3 kernel: [  607.622295]  [<c1033328>] ? do_exit+0x30/0x5cd
Sep 19 15:55:31 User-P3 kernel: [  607.622325]  [<c126c929>] ? printk+0xe/0x15
Sep 19 15:55:31 User-P3 kernel: [  607.622334]  [<c126ee80>] ? oops_end+0x98/0x9d
Sep 19 15:55:31 User-P3 kernel: [  607.622353]  [<c101b83f>] ? no_context+0x105/0x10e
Sep 19 15:55:31 User-P3 kernel: [  607.622363]  [<c101b95d>] ? __bad_area_nosemaphore+0x115/0x11d
Sep 19 15:55:31 User-P3 kernel: [  607.622388]  [<c10bfa95>] ? d_rehash+0x1f/0x2b
Sep 19 15:55:31 User-P3 kernel: [  607.622400]  [<c10c0c5d>] ? d_splice_alias+0x9a/0xa0
Sep 19 15:55:31 User-P3 kernel: [  607.622424]  [<c1134e16>] ? _atomic_dec_and_lock+0x26/0x40
Sep 19 15:55:31 User-P3 kernel: [  607.622435]  [<c10c1209>] ? dput+0x22/0x105
Sep 19 15:55:31 User-P3 kernel: [  607.622444]  [<c10b9ae4>] ? __follow_mount+0x1e/0x56
Sep 19 15:55:31 User-P3 kernel: [  607.622454]  [<c126fed4>] ? do_page_fault+0x1bd/0x301
Sep 19 15:55:31 User-P3 kernel: [  607.622463]  [<c101b99e>] ? bad_area+0x2d/0x32
Sep 19 15:55:31 User-P3 kernel: [  607.622472]  [<c126fd17>] ? do_page_fault+0x0/0x301
Sep 19 15:55:31 User-P3 kernel: [  607.622481]  [<c126e56b>] ? error_code+0x73/0x78
Sep 19 15:55:31 User-P3 kernel: [  607.622491]  [<c10c007b>] ? shrink_dcache_parent+0x2b/0xe8
Sep 19 15:55:31 User-P3 kernel: [  607.622515]  [<c10a00d8>] ? mmap_region+0x38c/0x444
Sep 19 15:55:31 User-P3 kernel: [  607.622524]  [<c1140ce7>] ? __percpu_counter_add+0x21/0x6d
Sep 19 15:55:31 User-P3 kernel: [  607.622535]  [<c108d4d9>] ? account_page_dirtied+0x2f/0x4b
Sep 19 15:55:31 User-P3 kernel: [  607.622544]  [<c10cde9a>] ? __set_page_dirty+0x44/0x82
Sep 19 15:55:31 User-P3 kernel: [  607.622560]  [<cca172b6>] ? ext2_sync_super+0x2e/0x43 [ext2]
Sep 19 15:55:31 User-P3 kernel: [  607.622574]  [<cca17ae2>] ? ext2_put_super+0x3c/0xb3 [ext2]
Sep 19 15:55:31 User-P3 kernel: [  607.622587]  [<c10b4e2c>] ? generic_shutdown_super+0x46/0xc6
Sep 19 15:55:31 User-P3 kernel: [  607.622596]  [<c10b4ec6>] ? kill_block_super+0x1a/0x2c
Sep 19 15:55:31 User-P3 kernel: [  607.622606]  [<c10e36fa>] ? vfs_quota_off+0x0/0xd
Sep 19 15:55:31 User-P3 kernel: [  607.622615]  [<c10b5463>] ? deactivate_super+0x4a/0x5f
Sep 19 15:55:31 User-P3 kernel: [  607.622625]  [<c10c544f>] ? sys_umount+0x2a5/0x2cb
Sep 19 15:55:31 User-P3 kernel: [  607.622634]  [<c1270002>] ? do_page_fault+0x2eb/0x301
Sep 19 15:55:31 User-P3 kernel: [  607.622644]  [<c10030fb>] ? sysenter_do_call+0x12/0x28
Sep 19 15:55:31 User-P3 kernel: [  607.622650] ---[ end trace 5ddf054afea616ca ]---
Sep 19 15:58:03 User-P3 kernel: [  759.622434] BUG: unable to handle kernel paging request at 003eb000
Sep 19 15:58:03 User-P3 kernel: [  759.622465] IP: [<c1140ce7>] __percpu_counter_add+0x21/0x6d
Sep 19 15:58:03 User-P3 kernel: [  759.622494] *pde = 00000000 
Sep 19 15:58:03 User-P3 kernel: [  759.622502] Oops: 0000 [#2] SMP 
Sep 19 15:58:03 User-P3 kernel: [  759.622510] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:01:08.2/usb1/speed
Sep 19 15:58:03 User-P3 kernel: [  759.622522] Modules linked in: isofs nls_utf8 nls_cp437 vfat fat usb_storage i810 i915 drm_kms_helper drm i2c_algo_bit video output ppdev lp fuse loop snd_usb_audio snd_usb_lib snd_intel8x0 snd_seq_midi snd_ac97_codec snd_seq_midi_event snd_rawmidi ac97_bus snd_hwdep snd_pcm uvcvideo snd_seq snd_timer videodev snd_seq_device v4l1_compat snd i2c_i801 intel_rng dcdbas parport_pc soundcore psmouse pcspkr parport rng_core shpchp processor evdev i2c_core button serio_raw snd_page_alloc pci_hotplug ext2 mbcache usbhid hid sg sd_mod sr_mod cdrom crc_t10dif ata_generic ata_piix uhci_hcd thermal libata floppy ehci_hcd 3c59x usbcore thermal_sys scsi_mod mii nls_base [last unloaded: scsi_wait_scan]
Sep 19 15:58:03 User-P3 kernel: [  759.622657] 
Sep 19 15:58:03 User-P3 kernel: [  759.622670] Pid: 1341, comm: xterm Tainted: G      D W  (2.6.32-5-686 #1) OptiPlex GX110               
Sep 19 15:58:03 User-P3 kernel: [  759.622679] EIP: 0060:[<c1140ce7>] EFLAGS: 00210006 CPU: 0
Sep 19 15:58:03 User-P3 kernel: [  759.622687] EIP is at __percpu_counter_add+0x21/0x6d
Sep 19 15:58:03 User-P3 kernel: [  759.622693] EAX: 00000000 EBX: ca9740ec ECX: ffffffff EDX: ffffffff
Sep 19 15:58:03 User-P3 kernel: [  759.622700] ESI: cb5ad8a8 EDI: 003eb000 EBP: 00000008 ESP: caa03c68
Sep 19 15:58:03 User-P3 kernel: [  759.622707]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Sep 19 15:58:03 User-P3 kernel: [  759.622716] Process xterm (pid: 1341, ti=caa02000 task=ca816ec0 task.ti=caa02000)
Sep 19 15:58:03 User-P3 kernel: [  759.622722] Stack:
Sep 19 15:58:03 User-P3 kernel: [  759.622726]  ca9740ec 00200282 cb5ad8a8 ca9740bc c1569f98 c108c867 00000008 ffffffff
Sep 19 15:58:03 User-P3 kernel: [  759.622742] <0> cb755330 00000001 c1569f80 cb5ad8a8 c108fb3f ca816ec0 ca816ec0 00000000
Sep 19 15:58:03 User-P3 kernel: [  759.622758] <0> caa03e68 caa03dd0 005385c0 00000000 00000004 c1539160 00000004 00000001
Sep 19 15:58:03 User-P3 kernel: [  759.622774] Call Trace:
Sep 19 15:58:03 User-P3 kernel: [  759.622813]  [<c108c867>] ? clear_page_dirty_for_io+0x8c/0xab
Sep 19 15:58:03 User-P3 kernel: [  759.622831]  [<c108fb3f>] ? shrink_page_list+0x2db/0x585
Sep 19 15:58:03 User-P3 kernel: [  759.622843]  [<c108ec98>] ? isolate_pages_global+0x87/0x1bc
Sep 19 15:58:03 User-P3 kernel: [  759.622853]  [<c1090177>] ? shrink_list+0x38e/0x61b
Sep 19 15:58:03 User-P3 kernel: [  759.622864]  [<c1090629>] ? shrink_zone+0x225/0x2c8
Sep 19 15:58:03 User-P3 kernel: [  759.622875]  [<c10911cb>] ? try_to_free_pages+0x1f6/0x31a
Sep 19 15:58:03 User-P3 kernel: [  759.622885]  [<c108ec11>] ? isolate_pages_global+0x0/0x1bc
Sep 19 15:58:03 User-P3 kernel: [  759.622896]  [<c108c2dc>] ? __alloc_pages_nodemask+0x302/0x4d9
Sep 19 15:58:03 User-P3 kernel: [  759.622918]  [<c109b91e>] ? handle_mm_fault+0x2ba/0x959
Sep 19 15:58:03 User-P3 kernel: [  759.622953]  [<c126d21e>] ? schedule+0x78f/0x7dc
Sep 19 15:58:03 User-P3 kernel: [  759.622972]  [<c1270002>] ? do_page_fault+0x2eb/0x301
Sep 19 15:58:03 User-P3 kernel: [  759.622982]  [<c126fd17>] ? do_page_fault+0x0/0x301
Sep 19 15:58:03 User-P3 kernel: [  759.622991]  [<c126e56b>] ? error_code+0x73/0x78
Sep 19 15:58:03 User-P3 kernel: [  759.622997] Code: cb 12 00 31 d2 89 d0 5b 5e c3 55 57 56 53 83 ec 04 89 04 24 8b 1c 24 64 a1 54 79 41 c1 8b 6c 24 18 8b 7b 14 03 3c 85 f0 bc 3b c1 <8b> 07 89 c3 89 c6 c1 fe 1f 89 e8 01 d3 11 ce 99 39 d6 7f 15 7c 
Sep 19 15:58:03 User-P3 kernel: [  759.623076] EIP: [<c1140ce7>] __percpu_counter_add+0x21/0x6d SS:ESP 0068:caa03c68
Sep 19 15:58:03 User-P3 kernel: [  759.623088] CR2: 00000000003eb000
Sep 19 15:58:03 User-P3 kernel: [  759.623096] ---[ end trace 5ddf054afea616cb ]---

Any ideas about what's going on here? This only happens if PCManfm is running, and it happens 100% of the time, so I don't think its flaky hardware. The USB thumbdrive has an ext2 partition on it, so could the partition be corrupted or something?

Super TWiT · 09-19-2011, 03:55 PM

Okay, so figured out that PCManFM was indeed automounting the drives, and if I unmount them before removing the drive, there is no problem. I disabled automounting, and everything is fine.

I guess I should have thought of that earlier...
But, this incident raises one question. Is it normal for the kernel to behave this badly when a USB drive is unplugged? I think I have done this before, accidentally, and I don't remember anything like this happening.

Super TWiT · 09-19-2011, 10:12 PM

I tried an Ubuntu Livecd, and it didn't launch into a kernel panic if I removed the disk while it was mounted. Is there any way I can stop this, although I usually always umount my devices before unplugging them. (I just didn't realize they were being automatically mounted)