abrt version: 2.0.1
architecture:   i686
cmdline:        ro root=/dev/mapper/vg_eve-lv_root rd_LVM_LV=vg_eve/lv_root rd_LVM_LV=vg_eve/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
comment:        This bug has accorded few times while unmounting external usb hard disk and this time it happened while watching a video from it. The system completely freezes and nothing (even other ttys) works.
component:      kernel
kernel:         2.6.38.7-30.fc15.i686.PAE
kernel_tainted: 640
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         BUG: unable to handle kernel paging request at 34702000
time:           Sun Jun 12 19:10:40 2011

backtrace:
:BUG: unable to handle kernel paging request at 34702000
:IP: [<c05e4975>] __percpu_counter_add+0xe/0x6d
:*pdpt = 0000000024d6b001 *pde = 0000000000000000 
:Oops: 0000 [#1] SMP 
:last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/graphics/fb0/state
:Modules linked in: usb_storage uas fuse sunrpc cpufreq_ondemand acpi_cpufreq mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables sierra usbserial snd_hda_codec_analog arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_seq iwl3945 snd_seq_device thinkpad_acpi microcode snd_pcm iwlcore mac80211 btusb bluetooth snd_timer cfg80211 snd e1000e soundcore rfkill iTCO_wdt i2c_i801 snd_page_alloc iTCO_vendor_support ipv6 firewire_ohci firewire_core sdhci_pci sdhci pata_acpi mmc_core yenta_socket crc_itu_t ata_generic i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 2580, comm: umount Not tainted 2.6.38.7-30.fc15.i686.PAE #1 LENOVO 7675CTO/7675CTO
:EIP: 0060:[<c05e4975>] EFLAGS: 00010096 CPU: 0
:EIP is at __percpu_counter_add+0xe/0x6d
:EAX: 00000000 EBX: f6ae4d48 ECX: 00000000 EDX: 00000001
:ESI: f5abfb80 EDI: 00000000 EBP: d3963e60 ESP: d3963e48
: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
:Process umount (pid: 2580, ti=d3962000 task=f03cd7f0 task.ti=d3962000)
:Stack:
: d3963e98 c052d746 d3963e64 ffffffff f5abfb80 00000000 d3963e70 c04b93b7
: 00000010 f03cd7f0 d3963e88 c04b9bad 00000001 00000000 f4023548 f5abfb80
: d3963e9c c050c070 f5abfb80 ed57a800 ee14c118 d3963ea8 c050c11b 00000000
:Call Trace:
: [<c052d746>] ? remove_proc_entry+0x19d/0x1a5
: [<c04b93b7>] __add_bdi_stat+0x33/0x37
: [<c04b9bad>] account_page_dirtied+0x52/0x70
: [<c050c070>] __set_page_dirty+0x56/0x8a
: [<c050c11b>] mark_buffer_dirty+0x77/0x7a
: [<c05624b8>] ext4_commit_super+0x16c/0x1b7
: [<c07e8f9c>] ? _raw_spin_lock+0xd/0xf
: [<c0521c74>] ? mb_cache_shrink+0x26/0x86
: [<c0563a7c>] ext4_put_super+0xe6/0x2c4
: [<c04ff6e1>] ? evict_inodes+0xb1/0xb9
: [<c04ef34b>] generic_shutdown_super+0x58/0xb8
: [<c04ef3cd>] kill_block_super+0x22/0x60
: [<c04ef5de>] deactivate_locked_super+0x1f/0x40
: [<c04eff6f>] deactivate_super+0x2e/0x31
: [<c0501b1c>] mntput_no_expire+0xb5/0xb9
: [<c05023ba>] sys_umount+0x270/0x297
: [<c04f5422>] ? path_put+0x1a/0x1d
: [<c040969f>] sysenter_do_call+0x12/0x28
:Code: d4 8d a4 c0 89 f0 e8 56 b1 ff ff b8 c0 8d a4 c0 e8 04 39 20 00 31 d2 5b 89 d0 5e 5d c3 55 89 e5 57 56 53 89 c3 83 ec 0c 8b 40 14 
:EIP: [<c05e4975>] __percpu_counter_add+0xe/0x6d SS:ESP 0068:d3963e48
:CR2: 0000000034702000