Hello all. On my Thunkpad T420i with 3.18.2 (possibly earlier as well but definitely not 3.17.6), 3.18.3, 3.18.4 and 3.18.5 kernels, I can reproduce the following behaviour 100% of the time: 1. Connect one of my (NTFS-formatted) WD 1TB 'My Passport' drives via USB. 2. Disconnect the cable. 3. Kernel Ooops. Please note that the drive need not be mounted at all. In fact, this even happens if I stop all graphical and automount services and plug-in and then disconnect the cable. Also, other USB drives and USB flash disks do not exhibit this behaviour... Go figure! The oops as caught and reported by netconsole is the following: [ 169.827703] usb 2-1.2: new high-speed USB device number 3 using ehci-pci [ 169.980222] usb-storage 2-1.2:1.0: USB Mass Storage device detected [ 169.982264] scsi host6: usb-storage 2-1.2:1.0 [ 169.984548] usbcore: registered new interface driver usb-storage [ 169.989296] usbcore: registered new interface driver uas [ 170.989458] scsi 6:0:0:0: Direct-Access WD My Passport 0748 1016 PQ: 0 ANSI: 6 [ 170.992673] scsi 6:0:0:1: Enclosure WD SES Device 1016 PQ: 0 ANSI: 6 [ 171.002766] sd 6:0:0:0: [sdb] Spinning up disk... [ 172.009278] .ready [ 173.012719] sd 6:0:0:0: [sdb] 1953458176 512-byte logical blocks: (1.00 TB/931 GiB) [ 173.016434] sd 6:0:0:0: [sdb] Write Protect is off [ 173.017780] ses 6:0:0:1: Attached Enclosure device [ 173.021519] sd 6:0:0:0: [sdb] Mode Sense: 47 00 10 08 [ 173.024736] sd 6:0:0:0: [sdb] No Caching mode page found [ 173.026785] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 173.040339] sdb: sdb1 [ 173.045652] sd 6:0:0:0: [sdb] Attached SCSI disk [ 183.706124] usb 2-1.2: USB disconnect, device number 3 [ 183.725921] BUG: unable to handle kernel NULL pointer dereference at 00000000000001a0 [ 183.728560] IP: [<ffffffff812850d5>] blk_post_runtime_resume+0x65/ 0x80 [ 183.730820] PGD 0 [ 183.733038] Oops: 0002 [#1] PREEMPT SMP [ 183.735285] Modules linked in: ses enclosure uas usb_storage netconsole joydev mousedev snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic coretemp arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel iwldvm kvm mac80211 crct10dif_pclmul crc32_pclmul crc32c_intel iTCO_wdt iTCO_vendor_support ghash_clmulni_intel aesni_intel iwlwifi aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse serio_raw i2c_i801 cfg80211 ip6t_REJECT nf_reject_ipv6 thinkpad_acpi wmi nvram xt_hl rfkill ip6t_rt hwmon battery ac snd_hda_intel tpm_tis snd_hda_controller tpm snd_hda_codec snd_hwdep nf_conntrack_ipv6 snd_pcm nf_defrag_ipv6 evdev snd_timer e1000e snd thermal mac_hid mei_me soundcore mei ptp ipt_REJECT lpc_ich nf_reject_ipv4 pps_core shpchp processor xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack e1000e snd thermal mac_hid mei_me soundcore mei ptp ipt_REJECT lpc_ich nf_reject_ipv4 pps_core shpchp processor xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables sch_fq_codel vboxdrv(O) usbnet mii tp_smapi(O) thinkpad_ec(O) nfs lockd grace sunrpc fscache cpufreq_powersave acpi_call(O) ext4 crc16 mbcache jbd2 sd_mod atkbd libps2 sdhci_pci sdhci led_class ahci libahci libata ehci_pci ehci_hcd scsi_mod mmc_core usbcore usb_common i8042 serio i915 button intel_gtt i2c_algo_bit video drm_kms_helper drm i2c_core [ 183.981709] CPU: 0 PID: 4 Comm: kworker/0:0 Tainted: G UD O 3.18.5-1-ARCH #1 [ 183.985915] Hardware name: LENOVO 4177CTO/4177CTO, BIOS 83ET70WW (1.40 ) 06/12/2012 [ 183.990082] task: ffff880212941e30 ti: ffff88021296c000 task.ti: ffff88021296c000 [ 183.994203] RIP: 0010:[<ffffffff81091500>] [<ffffffff81091500>] kthread_data+0x10/0x20 [ 183.998426] RSP: 0018:ffff88021296f3e8 EFLAGS: 00010092 [ 184.002645] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 184.006893] RDX: 000000000000000f RSI: 0000000000000000 RDI: ffff880212941e30 [ 184.011063] RBP: ffff88021296f3e8 R08: 0000000000000000 R09: ffff880215803a00 [ 184.015247] R10: ffff88021e216480 R11: ffffea000846fc40 R12: ffff88021e213640 [ 184.019428] R13: ffff88021e213640 R14: ffff880212941e30 R15: 0000000000000000 [ 184.023591] FS: 0000000000000000(0000) GS:ffff88021e200000(0000) knlGS:0000000000000000 [ 184.027820] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 184.032041] CR2: 0000000000000028 CR3: 0000000001811000 CR4: 00000000000407f0 [ 184.036227] Stack: [ 184.040518] ffff88021296f408 ffffffff8108c275 ffff88021296f408 0000000000000000 [ 184.044910] ffff88021296f528 ffffffff81550f55 ffff880212941e30 0000000000013640 [ 184.235199] [<ffffffff815552fc>] ret_from_fork+0x7c/0xb0 [ 184.237699] [<ffffffff81090d50>] ? kthread_create_on_node+0x1c0/0x1c0 [ 184.240179] Code: 00 48 89 e5 5d 48 8b 40 c8 48 c1 e8 02 83 e0 01 What can I do to further debug this? -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
