[ 1125.780250] usb-storage: waiting for device to settle before scanning [ 1126.016797] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1126.290122] usb 2-1.4: usbfs: interface 0 claimed by usb-storage while 'qemu-system-x86' sets config #1 [ 1142.166799] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1142.302141] scsi18 : SCSI emulation for USB Mass Storage devices [ 1142.302247] usb-storage: device found at 3 [ 1142.302250] usb-storage: waiting for device to settle before scanning [ 1147.298496] usb-storage: device scan complete [ 1147.299574] scsi 18:0:0:0: CD-ROM HL-DT-ST DVD-RW GWA-4040N 1.01 PQ: 0 ANSI: 0 [ 1147.300437] scsi 18:0:0:1: Direct-Access GENERIC IDE CARD READER 9350 PQ: 0 ANSI: 0 CCS [ 1147.304182] sd 18:0:0:1: [sdc] Attached SCSI removable disk [ 1147.768301] sr0: scsi3-mmc drive: 40x/24x writer cd/rw xa/form2 cdda tray [ 1147.768306] Uniform CD-ROM driver Revision: 3.20 [ 1147.768428] sr 18:0:0:0: Attached scsi CD-ROM sr0 [ 1147.807633] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 1147.807874] sd 4:0:0:0: Attached scsi generic sg1 type 0 [ 1147.807961] sr 18:0:0:0: Attached scsi generic sg2 type 5 [ 1147.808630] sd 18:0:0:1: Attached scsi generic sg3 type 0 [ 1178.054300] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1178.282291] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1179.082176] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1179.217424] usb 2-1.4: usbfs: interface 0 claimed by usb-storage while 'qemu-system-x86' sets config #1 [ 1179.262642] scsi 18:0:0:0: Device offlined - not ready after error recovery [ 1179.262690] BUG: unable to handle kernel NULL pointer dereference at 00000304 [ 1179.270111] IP: [] scsi_prep_state_check+0x1/0x77 [scsi_mod] [ 1179.277440] *pde = 00000000 [ 1179.284685] Oops: 0000 [#1] SMP [ 1179.291864] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.0/class [ 1179.299088] Modules linked in: sg sr_mod cdrom usb_storage kvm_intel kvm sco bridge stp acpi_cpufreq ppdev lp cpufreq_userspace rfcomm cpufreq_powersave bnep cpufreq_conservative l2cap crc16 cpufreq_stats bluetooth rfkill binfmt_misc fuse loop i915 drm_kms_helper drm i2c_algo_bit parport_pc i2c_i801 parport i2c_core pcspkr psmouse serio_raw ac evdev button processor video output ext3 jbd mbcache sd_mod crc_t10dif ahci fan libata scsi_mod thermal ehci_hcd thermal_sys e1000e usbcore nls_base [last unloaded: scsi_wait_scan] [ 1179.322456] [ 1179.330138] Pid: 10915, comm: blkid Not tainted (2.6.32-5-686 #1) [ 1179.337876] EIP: 0060:[] EFLAGS: 00010046 CPU: 0 [ 1179.345576] EIP is at scsi_prep_state_check+0x1/0x77 [scsi_mod] [ 1179.353237] EAX: 00000000 EBX: f5c44d48 ECX: 00000001 EDX: f5c44d48 [ 1179.360906] ESI: f4e58000 EDI: 00000000 EBP: 00000000 ESP: f4e77b0c [ 1179.368515] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 1179.376104] Process blkid (pid: 10915, ti=f4e76000 task=f6623b80 task.ti=f4e76000) [ 1179.383724] Stack: [ 1179.391259] f5c44d48 f8000a3b f5c44d48 f4e58000 f4e58000 00000000 f8000b1a f5c44d48 [ 1179.391432] <0> 00000000 c11291eb f5c44d48 f4e58000 00000000 f5c44d48 00000000 f80000c4 [ 1179.399130] <0> f4e58000 c144f4e0 c103b6c4 00000092 f4e58000 f4e58000 f4e58000 f5c44d48 [ 1179.414336] Call Trace: [ 1179.421904] [] ? scsi_setup_blk_pc_cmnd+0xd/0xd0 [scsi_mod] [ 1179.429514] [] ? scsi_prep_fn+0x1c/0x29 [scsi_mod] [ 1179.437072] [] ? blk_peek_request+0xa8/0x150 [ 1179.444593] [] ? scsi_request_fn+0x26/0x46f [scsi_mod] [ 1179.452089] [] ? del_timer+0x55/0x5c [ 1179.459536] [] ? __generic_unplug_device+0x23/0x25 [ 1179.466971] [] ? blk_execute_rq_nowait+0x59/0x77 [ 1179.474358] [] ? blk_execute_rq+0x84/0xb2 [ 1179.481681] [] ? blk_end_sync_rq+0x0/0x23 [ 1179.488946] [] ? get_request+0x1b0/0x25b [ 1179.496164] [] ? get_request_wait+0x1a/0x146 [ 1179.503328] [] ? scsi_execute+0xce/0x126 [scsi_mod] [ 1179.510469] [] ? scsi_execute_req+0x5a/0x81 [scsi_mod] [ 1179.517576] [] ? ioctl_internal_command+0x4a/0x125 [scsi_mod] [ 1179.524674] [] ? scsi_set_medium_removal+0x4d/0x83 [scsi_mod] [ 1179.531729] [] ? cdrom_open+0x2dc/0x891 [cdrom] [ 1179.538748] [] ? zone_watermark_ok+0x16/0x99 [ 1179.545730] [] ? kmap_atomic_prot+0xc7/0xea [ 1179.552659] [] ? kunmap_atomic+0x51/0x6d [ 1179.559539] [] ? kunmap_atomic+0x5d/0x6d [ 1179.566330] [] ? get_page_from_freelist+0x33a/0x3c7 [ 1179.573113] [] ? __alloc_pages_nodemask+0xf3/0x4d9 [ 1179.579874] [] ? zone_watermark_ok+0x16/0x99 [ 1179.586574] [] ? kmap_atomic_prot+0xc7/0xea [ 1179.593225] [] ? kunmap_atomic+0x51/0x6d [ 1179.599825] [] ? kunmap_atomic+0x5d/0x6d [ 1179.606350] [] ? get_page_from_freelist+0x33a/0x3c7 [ 1179.612856] [] ? zone_watermark_ok+0x16/0x99 [ 1179.619314] [] ? kmap_atomic_prot+0xc7/0xea [ 1179.625717] [] ? kobject_get+0xf/0x13 [ 1179.632089] [] ? get_disk+0x6f/0x87 [ 1179.638398] [] ? kobj_lookup+0x132/0x161 [ 1179.644673] [] ? __d_lookup+0x9e/0xd3 [ 1179.650889] [] ? kobject_get+0xf/0x13 [ 1179.657054] [] ? sr_block_open+0x66/0x7a [sr_mod] [ 1179.663201] [] ? __blkdev_get+0xb0/0x2c7 [ 1179.669324] [] ? blkdev_open+0x60/0x8b [ 1179.675844] [] ? __dentry_open+0x156/0x246 [ 1179.682312] [] ? nameidata_to_filp+0x29/0x3c [ 1179.688743] [] ? blkdev_open+0x0/0x8b [ 1179.695116] [] ? do_filp_open+0x43f/0x802 [ 1179.701454] [] ? handle_mm_fault+0x48f/0x959 [ 1179.707752] [] ? alloc_fd+0x52/0xb7 [ 1179.713985] [] ? do_sys_open+0x4c/0xdf [ 1179.720171] [] ? sys_open+0x1e/0x23 [ 1179.726298] [] ? sysenter_do_call+0x12/0x28 [ 1179.732377] Code: b4 1e 01 f8 00 0f 85 da fe ff ff e9 bc fe ff ff 83 3d b8 1e 01 f8 00 0f 85 26 ff ff ff e9 08 ff ff ff 83 c4 1c 5b 5e 5f 5d c3 53 <8b> 88 04 03 00 00 83 f9 02 74 67 83 e9 04 83 f9 04 77 53 ff 24 [ 1179.745767] EIP: [] scsi_prep_state_check+0x1/0x77 [scsi_mod] SS:ESP 0068:f4e77b0c [ 1179.752351] CR2: 0000000000000304 [ 1179.758839] ---[ end trace aece1fe64e2fa0d8 ]--- [ 1180.478049] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1180.617258] scsi19 : SCSI emulation for USB Mass Storage devices [ 1180.623650] usb-storage: device found at 3 [ 1180.630637] usb-storage: waiting for device to settle before scanning [ 1180.858047] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1181.141945] usb 2-1.4: usbfs: interface 0 claimed by usb-storage while 'qemu-system-x86' sets config #1 [ 1181.869923] usb 2-1.4: reset high speed USB device using ehci_hcd and address 3 [ 1182.009124] scsi20 : SCSI emulation for USB Mass Storage devices [ 1182.015195] usb-storage: device found at 3