abrt version: 2.0.1
architecture:   i686
cmdline:        ro root=/dev/mapper/VolGroup-LogVol01 rd_LVM_LV=VolGroup/LogVol01 rd_LVM_LV=VolGroup/LogVol00 rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
component:      kernel
kernel:         2.6.38.6-27.fc15.i686.PAE
kernel_tainted: 128
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         BUG: unable to handle kernel NULL pointer dereference at 00000028
time:           Sun May 29 14:30:15 2011

backtrace:
:BUG: unable to handle kernel NULL pointer dereference at 00000028
:IP: [<c05be088>] elv_completed_request+0x3a/0x46
:*pdpt = 000000002d395001 *pde = 000000013ed76067 
:Oops: 0000 [#1] SMP 
:last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/class
:Modules linked in: usb_storage uas fuse sunrpc cpufreq_ondemand acpi_cpufreq mperf capi capifs kernelcapi ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel arc4 snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm ath9k mac80211 ath9k_common ath9k_hw ath uvcvideo atl1c videodev snd_timer iTCO_wdt iTCO_vendor_support wmi snd soundcore snd_page_alloc microcode cfg80211 i2c_i801 joydev jmb38x_ms rfkill memstick ipv6 sdhci_pci sdhci mmc_core nouveau ttm drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 3075, comm: scsi_eh_4 Not tainted 2.6.38.6-27.fc15.i686.PAE #1 Acer             Aspire 4736Z    /Aspire 4736Z    
:EIP: 0060:[<c05be088>] EFLAGS: 00010002 CPU: 1
:EIP is at elv_completed_request+0x3a/0x46
:EAX: f156e720 EBX: e9c00f00 ECX: 00000000 EDX: da5c6bc8
:Buffer I/O error on device sdb1, logical block 0
:Buffer I/O error on device sdb1, logical block 1
:Buffer I/O error on device sdb1, logical block 2
:Buffer I/O error on device sdb1, logical block 3
:Buffer I/O error on device sdb1, logical block 4
:ESI: da5c6bc8 EDI: 00000068 EBP: e9c57e4c ESP: e9c57e48
: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
:Process scsi_eh_4 (pid: 3075, ti=e9c56000 task=f0723240 task.ti=e9c56000)
:Stack:
: f156e720 e9c57e60 c05c25e6 da5c6bc8 ed3fc600 00000068 e9c57e8c c05c27cf
: 00000001 0000052b e9c57e78 e9c57e80 fffffffb 00000004 f156e720 da5c6bc8
: fffffffb e9c57ea8 c05c28a4 00000000 00000246 fffffffb da5c6bc8 c097ab7d
:Call Trace:
: [<c05c25e6>] __blk_put_request+0x2b/0x91
: [<c05c27cf>] blk_finish_request+0x183/0x18b
: [<c05c28a4>] blk_end_bidi_request+0x3f/0x58
: [<c05c28d4>] blk_end_request+0x17/0x19
: [<c05c2909>] blk_end_request_err+0x33/0x37
: [<c0696fad>] scsi_io_completion+0x392/0x3e0
: [<c06900a3>] scsi_finish_command+0xc9/0xd1
: [<c0693e21>] ? scsi_eh_ready_devs+0x12c/0x5fd
: [<c0469b90>] ? arch_local_irq_save+0x12/0x17
: [<c0694618>] scsi_eh_flush_done_q+0xec/0x107
: [<c0694c3e>] scsi_error_handler+0x330/0x50e
: [<c043bf33>] ? default_wake_function+0x10/0x12
: [<c042f160>] ? __wake_up_common+0x3b/0x62
: [<c069490e>] ? scsi_error_handler+0x0/0x50e
: [<c0458b1c>] kthread+0x67/0x6c
: [<c0458ab5>] ? 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: [<c05be088>] elv_completed_request+0x3a/0x46 SS:ESP 0068:e9c57e48
:CR2: 0000000000000028