abrt version: 2.0.3
architecture:   i686
cmdline:        ro root=UUID=5a4a6b77-55f4-46f4-b5a9-64f316125ec2 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
comment:        While unmounting(Safely removing) external hard drive
component:      kernel
kernel:         2.6.38.8-32.fc15.i686.PAE
kernel_tainted: 128
kernel_tainted_long: Kernel has oopsed before.
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         BUG: unable to handle kernel NULL pointer dereference at 00000028
time:           Mon Sep 26 00:26:04 2011

backtrace:
:BUG: unable to handle kernel NULL pointer dereference at 00000028
:IP: [<c05be190>] elv_completed_request+0x3a/0x46
:*pdpt = 000000003054d001 *pde = 000000007dd41067 
:Buffer I/O error on device sdc1, logical block 0
:Buffer I/O error on device sdc1, logical block 1
:Buffer I/O error on device sdc1, logical block 1
:Buffer I/O error on device sdc1, logical block 78142159
:Buffer I/O error on device sdc1, logical block 78142159
:Buffer I/O error on device sdc1, logical block 1
:Buffer I/O error on device sdc1, logical block 1
:Buffer I/O error on device sdc1, logical block 78142159
:Buffer I/O error on device sdc1, logical block 0
:Oops: 0000 [#1] SMP 
:last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-3/power/autosuspend
:Modules linked in: vfat fat usb_storage uas ppp_deflate zlib_deflate ppp_async crc_ccitt ppp_generic slhc sunrpc p4_clockmod rfcomm sco bnep capi capifs kernelcapi ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ipt_MASQUERADE iptable_nat nf_nat ip6_tables l2cap fuse snd_hda_codec_hdmi snd_hda_codec_realtek snd_usb_audio snd_hda_intel snd_hda_codec snd_seq snd_pcm snd_hwdep snd_usbmidi_lib ppdev snd_rawmidi btusb parport_pc r8169 bluetooth snd_timer uvcvideo snd_seq_device parport snd joydev iTCO_wdt mii videodev rfkill i2c_i801 iTCO_vendor_support soundcore microcode snd_page_alloc serio_raw ipv6 radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: mperf]
:Pid: 2570, comm: scsi_eh_6 Not tainted 2.6.38.8-32.fc15.i686.PAE #1 ACER AcerPower Series/E915GVM
:EIP: 0060:[<c05be190>] EFLAGS: 00010002 CPU: 1
:EIP is at elv_completed_request+0x3a/0x46
:EAX: eaebc420 EBX: ef973c00 ECX: 00000000 EDX: de9a39f8
:ESI: de9a39f8 EDI: 00000068 EBP: e11ede4c ESP: e11ede48
: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
:Process scsi_eh_6 (pid: 2570, ti=e11ec000 task=f3c9b240 task.ti=e11ec000)
:Stack:
: eaebc420 e11ede60 c05c272f de9a39f8 eae9f800 00000068 e11ede8c c05c2918
: 00000001 00000542 e11ede78 e11ede80 fffffffb 00000004 eaebc420 de9a39f8
: fffffffb e11edea8 c05c29ed 00000000 00000246 fffffffb de9a39f8 c097ac87
:Call Trace:
: [<c05c272f>] __blk_put_request+0x2b/0x91
: [<c05c2918>] blk_finish_request+0x183/0x18b
: [<c05c29ed>] blk_end_bidi_request+0x3f/0x58
: [<c05c2a1d>] blk_end_request+0x17/0x19
: [<c05c2a52>] blk_end_request_err+0x33/0x37
: [<c0697131>] scsi_io_completion+0x392/0x3e0
: [<c0690227>] scsi_finish_command+0xc9/0xd1
: [<c0693fa5>] ? scsi_eh_ready_devs+0x12c/0x5fd
: [<c0469c40>] ? arch_local_irq_save+0x12/0x17
: [<c069479c>] scsi_eh_flush_done_q+0xec/0x107
: [<c0694dc2>] scsi_error_handler+0x330/0x50e
: [<c043bf97>] ? default_wake_function+0x10/0x12
: [<c042f1c4>] ? __wake_up_common+0x3b/0x62
: [<c0694a92>] ? scsi_error_handler+0x0/0x50e
: [<c0458bdc>] kthread+0x67/0x6c
: [<c0458b75>] ? kthread+0x0/0x6c
: [<c0409c3e>] kernel_thread_helper+0x6/0x10
:Code: f6 c5 80 74 2f 83 7a 24 01 74 05 f6 c1 40 74 24 83 e1 11 49 0f 95 c1 0f b6 c9 81 c1 98 00 00 00 ff 0c 88 f6 42 21 08 74 0b 8b 0b <8b> 49 28 85 c9 74 02 ff d1 5b 5d c3 55 89 e5 57 56 53 83 ec 08 
:EIP: [<c05be190>] elv_completed_request+0x3a/0x46 SS:ESP 0068:e11ede48
:CR2: 0000000000000028