Description of problem:
Oct 31 18:46:26 jks-desktop kernel: [24235.358682] usb 2-4: USB disconnect, device number 107
Oct 31 18:46:26 jks-desktop kernel: [24235.592079] usb 2-4: new high speed USB device number 108 using ehci_hcd
Oct 31 18:46:26 jks-desktop kernel: [24235.720548] usb 2-4: New USB device found, idVendor=0bb4, idProduct=0ff9
Oct 31 18:46:26 jks-desktop kernel: [24235.720558] usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 31 18:46:26 jks-desktop kernel: [24235.720566] usb 2-4: Product: Android Phone
Oct 31 18:46:26 jks-desktop kernel: [24235.720572] usb 2-4: Manufacturer: HTC
Oct 31 18:46:26 jks-desktop kernel: [24235.720577] usb 2-4: SerialNumber: HT07NPS06123
Oct 31 18:46:26 jks-desktop kernel: [24235.723482] scsi334 : usb-storage 2-4:1.0
Oct 31 18:46:26 jks-desktop mtp-probe: checking bus 2, device 108: "/sys/devices/pci0000:00/0000:00:04.1/usb2/2-4"
Oct 31 18:46:26 jks-desktop mtp-probe: bus: 2, device: 108 was not an MTP device
Oct 31 18:46:27 jks-desktop kernel: [24236.737209] scsi 334:0:0:0: Direct-Access     HTC      Android Phone    0100 PQ: 0 ANSI: 2
Oct 31 18:46:27 jks-desktop kernel: [24236.771727] sd 334:0:0:0: Attached scsi generic sg4 type 0
Oct 31 18:46:27 jks-desktop kernel: [24236.780448] sd 334:0:0:0: [sdd] Attached SCSI removable disk
Oct 31 18:46:27 jks-desktop kernel: [24236.807434] usb 2-4: USB disconnect, device number 108
Oct 31 18:46:27 jks-desktop kernel: [24236.843248] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
Oct 31 18:46:27 jks-desktop kernel: [24236.843262] IP: [<ffffffff81319bbc>] sd_revalidate_disk+0x36/0x16c7
Oct 31 18:46:27 jks-desktop kernel: [24236.843280] PGD 1dc716067 PUD 1dc43b067 PMD 0 
Oct 31 18:46:27 jks-desktop kernel: [24236.843290] Oops: 0000 [#1] SMP 
Oct 31 18:46:27 jks-desktop kernel: [24236.843299] CPU 0 
Oct 31 18:46:27 jks-desktop kernel: [24236.843302] Modules linked in: fuse bnep bluetooth rfkill ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bridge stp llc sunrpc cpufreq_ondemand powernow_k8 mperf w83627ehf hwmon_vid ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_physdev ip6table_filter nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ip6_tables tuner_simple tuner_types lgdt330x ir_lirc_codec lirc_dev ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_rc5_decoder dvb_usb_cxusb dib7000p dibx000_common dvb_usb dvb_core ir_nec_decoder rc_core dib0070 joydev snd_hda_codec_realtek nvidia(P) snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm k8temp edac_core edac_mce_amd snd_timer i2c_nforce2 snd forcedeth shpchp soundcore snd_page_alloc i2c_core virtio_net kvm_amd kvm ipv6 usb_storage ata_generic pata_acpi uas video pata_amd wmi [last unloaded: scsi_wait_scan]
Oct 31 18:46:27 jks-desktop kernel: [24236.843428] 
Oct 31 18:46:27 jks-desktop kernel: [24236.843435] Pid: 14504, comm: blkid Tainted: P            2.6.40.6-0.fc15.x86_64 #1 To Be Filled By O.E.M. To Be Filled By O.E.M./K10N78
Oct 31 18:46:27 jks-desktop kernel: [24236.843447] RIP: 0010:[<ffffffff81319bbc>]  [<ffffffff81319bbc>] sd_revalidate_disk+0x36/0x16c7
Oct 31 18:46:27 jks-desktop kernel: [24236.843459] RSP: 0018:ffff88021e277a58  EFLAGS: 00010246
Oct 31 18:46:27 jks-desktop kernel: [24236.843465] RAX: 0000000000000000 RBX: ffff88023942a700 RCX: 0000000000000001
Oct 31 18:46:27 jks-desktop kernel: [24236.843471] RDX: 0000000000000001 RSI: ffff880141d0bc40 RDI: ffff880141cf6800
Oct 31 18:46:27 jks-desktop kernel: [24236.843478] RBP: ffff88021e277b18 R08: 00000008ffffffff R09: ffffffff812f4c42
Oct 31 18:46:27 jks-desktop kernel: [24236.843484] R10: ffffffff81238558 R11: ffff88021e277ab8 R12: 0000000000000000
Oct 31 18:46:27 jks-desktop kernel: [24236.843490] R13: ffff880141cf6800 R14: 000000000000001d R15: 0000000000000000
Oct 31 18:46:27 jks-desktop kernel: [24236.843497] FS:  00007f9e2348c760(0000) GS:ffff880239c00000(0000) knlGS:00000000f7741890
Oct 31 18:46:27 jks-desktop kernel: [24236.843504] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Oct 31 18:46:27 jks-desktop kernel: [24236.843510] CR2: 0000000000000008 CR3: 0000000141d7b000 CR4: 00000000000006f0
Oct 31 18:46:27 jks-desktop kernel: [24236.843516] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Oct 31 18:46:27 jks-desktop kernel: [24236.843523] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Oct 31 18:46:27 jks-desktop kernel: [24236.843530] Process blkid (pid: 14504, threadinfo ffff88021e276000, task ffff8801ac0dae60)
Oct 31 18:46:27 jks-desktop kernel: [24236.843535] Stack:
Oct 31 18:46:27 jks-desktop kernel: [24236.843539]  ffffea000702b3b0 ffff880141cf6848 ffff880141cf6878 ffff880141cf6800
Oct 31 18:46:27 jks-desktop kernel: [24236.843549]  ffff88021e277a88 ffffffff81488576 ffff880141cf6800 ffffffff81128eab
Oct 31 18:46:27 jks-desktop kernel: [24236.843558]  ffff88023942a7d8 ffff880141cf6800 ffff88021e277ad8 ffffffff8113adac
Oct 31 18:46:27 jks-desktop kernel: [24236.843568] Call Trace:
Oct 31 18:46:27 jks-desktop kernel: [24236.843582]  [<ffffffff81488576>] ? _raw_spin_lock+0xe/0x10
Oct 31 18:46:27 jks-desktop kernel: [24236.843592]  [<ffffffff81128eab>] ? get_super+0x29/0xa9
Oct 31 18:46:27 jks-desktop kernel: [24236.843600]  [<ffffffff8113adac>] ? iput+0x33/0x138
Oct 31 18:46:27 jks-desktop kernel: [24236.843610]  [<ffffffff8117ce2e>] rescan_partitions+0xb4/0x442
Oct 31 18:46:27 jks-desktop kernel: [24236.843620]  [<ffffffff81150002>] __blkdev_get+0x1af/0x3a0
Oct 31 18:46:27 jks-desktop kernel: [24236.843629]  [<ffffffff811504c6>] ? blkdev_get+0x2d3/0x2d3
Oct 31 18:46:27 jks-desktop kernel: [24236.843637]  [<ffffffff811503d7>] blkdev_get+0x1e4/0x2d3
Oct 31 18:46:27 jks-desktop kernel: [24236.843645]  [<ffffffff8114f4ba>] ? bdget+0x107/0x112
Oct 31 18:46:27 jks-desktop kernel: [24236.843653]  [<ffffffff811504c6>] ? blkdev_get+0x2d3/0x2d3
Oct 31 18:46:27 jks-desktop kernel: [24236.843661]  [<ffffffff81150530>] blkdev_open+0x6a/0x6f
Oct 31 18:46:27 jks-desktop kernel: [24236.843669]  [<ffffffff811259c1>] __dentry_open+0x17d/0x2be
Oct 31 18:46:27 jks-desktop kernel: [24236.843678]  [<ffffffff81488576>] ? _raw_spin_lock+0xe/0x10
Oct 31 18:46:27 jks-desktop kernel: [24236.843686]  [<ffffffff8112694b>] nameidata_to_filp+0x60/0x67
Oct 31 18:46:27 jks-desktop kernel: [24236.843695]  [<ffffffff81132107>] do_last+0x434/0x581
Oct 31 18:46:27 jks-desktop kernel: [24236.843703]  [<ffffffff81132dee>] path_openat+0xc8/0x31c
Oct 31 18:46:27 jks-desktop kernel: [24236.843712]  [<ffffffff810f9b1d>] ? handle_mm_fault+0x1c8/0x1db
Oct 31 18:46:27 jks-desktop kernel: [24236.843720]  [<ffffffff8113307a>] do_filp_open+0x38/0x86
Oct 31 18:46:27 jks-desktop kernel: [24236.843729]  [<ffffffff8113c930>] ? alloc_fd+0x72/0x11d
Oct 31 18:46:27 jks-desktop kernel: [24236.843737]  [<ffffffff811269c0>] do_sys_open+0x6e/0x100
Oct 31 18:46:27 jks-desktop kernel: [24236.843746]  [<ffffffff810a0f88>] ? audit_syscall_entry+0x145/0x171
Oct 31 18:46:27 jks-desktop kernel: [24236.843754]  [<ffffffff81126a72>] sys_open+0x20/0x22
Oct 31 18:46:27 jks-desktop kernel: [24236.843764]  [<ffffffff8148ed02>] system_call_fastpath+0x16/0x1b
Oct 31 18:46:27 jks-desktop kernel: [24236.843769] Code: 54 53 48 81 ec 98 00 00 00 66 66 66 66 90 4c 8b a7 28 03 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 c8 31 c0 48 89 bd 70 ff ff ff 
Oct 31 18:46:27 jks-desktop kernel: [24236.843838] RIP  [<ffffffff81319bbc>] sd_revalidate_disk+0x36/0x16c7
Oct 31 18:46:27 jks-desktop kernel: [24236.843847]  RSP <ffff88021e277a58>
Oct 31 18:46:27 jks-desktop kernel: [24236.843851] CR2: 0000000000000008
Oct 31 18:46:27 jks-desktop kernel: [24236.843885] ---[ end trace 43ff506f9fe2529a ]---
Oct 31 18:46:27 jks-desktop udevd-work[13934]: '/sbin/blkid -o udev -p /dev/sdd' unexpected exit with status 0x0009
Oct 31 18:46:27 jks-desktop kernel: [24237.044073] usb 2-4: new high speed USB device number 109 using ehci_hcd
Oct 31 18:46:28 jks-desktop kernel: [24237.174129] usb 2-4: New USB device found, idVendor=0bb4, idProduct=0ff9
Oct 31 18:46:28 jks-desktop kernel: [24237.174135] usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 31 18:46:28 jks-desktop kernel: [24237.174138] usb 2-4: Product: Android Phone
Oct 31 18:46:28 jks-desktop kernel: [24237.174140] usb 2-4: Manufacturer: HTC
Oct 31 18:46:28 jks-desktop kernel: [24237.174142] usb 2-4: SerialNumber: HT07NPS06123
Oct 31 18:46:28 jks-desktop kernel: [24237.176955] scsi335 : usb-storage 2-4:1.0
Oct 31 18:46:28 jks-desktop mtp-probe: checking bus 2, device 109: "/sys/devices/pci0000:00/0000:00:04.1/usb2/2-4"
Oct 31 18:46:28 jks-desktop mtp-probe: bus: 2, device: 109 was not an MTP device


Version-Release number of selected component (if applicable):
2.6.40.6-0.fc15.x86_64 

How reproducible:
It happens to me every few days, I don't know how to reproduce on demand.