kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-vivid/

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1421057

Title:
  BUG: unable to handle kernel NULL pointer dereference at
  (null)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13

  [25164.310618] usb 7-2: USB disconnect, device number 2
  [25164.310819] BUG: unable to handle kernel NULL pointer dereference at           (null)
  [25164.310875] IP: [<ffffffffa02d0142>] snd_info_disconnect+0x22/0xd0 [snd]
  [25164.310925] PGD 0 
  [25164.310941] Oops: 0000 [#1] SMP 
  [25164.310966] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables ctr ccm dm_crypt nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache eeepc_wmi asus_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm arc4 snd_hda_codec_realtek dm_multipath scsi_dh crct10dif_pclmul ath9k crc32_pclmul ath9k_common ath9k_hw snd_hda_intel snd_usb_audio snd_hda_codec ath ghash_clmulni_intel snd_usbmidi_lib aesni_intel mac80211 snd_hwdep snd_seq_midi aes_x86_64 snd_seq_midi_event lrw gf128mul glue_helper ablk_helper snd_rawmidi cryptd cfg80211 serio_raw snd_pcm snd_seq lpc_ich snd_page_alloc shpchp snd_seq_device snd_timer snd mei_me mei soundcore mac_hid nls_iso8859_1 lp parport ses enclosure raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 usb_storage mxm_wmi i915 psmouse i2c_algo_bit e1000e firewire_ohci drm_kms_helper ahci firewire_core libahci drm ptp crc_itu_t pps_core video wmi
  [25164.311800] CPU: 1 PID: 71 Comm: khubd Not tainted 3.13.0-45-generic #74-Ubuntu
  [25164.311841] Hardware name: System manufacturer System Product Name/P8Z77-V PRO, BIOS 1708 11/09/2012
  [25164.311891] task: ffff8807f4b30000 ti: ffff8807f4b26000 task.ti: ffff8807f4b26000
  [25164.311932] RIP: 0010:[<ffffffffa02d0142>]  [<ffffffffa02d0142>] snd_info_disconnect+0x22/0xd0 [snd]
  [25164.311993] RSP: 0018:ffff8807f4b27ad8  EFLAGS: 00010207
  [25164.312023] RAX: 0000000000000000 RBX: 02ffff0000000000 RCX: 000000018020000a
  [25164.312062] RDX: ffffea001fc85d40 RSI: 000000008020000a RDI: ffffea001fc85c28
  [25164.312101] RBP: ffff8807f4b27af0 R08: 0000000000000000 R09: 0000000000000001
  [25164.312140] R10: ffffea001fcbe480 R11: ffffffff8122a08d R12: ffffea001fc85cb0
  [25164.312178] R13: ffffea001fc85c28 R14: ffff8807f031b240 R15: 0000000000000000
  [25164.312217] FS:  0000000000000000(0000) GS:ffff88081fa40000(0000) knlGS:0000000000000000
  [25164.312261] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [25164.312293] CR2: 0000000000000000 CR3: 0000000001c0e000 CR4: 00000000001407e0
  [25164.312332] Stack:
  [25164.312345]  02ffff0000000000 ffff8807f0250048 ffff8807f024ffc0 ffff8807f4b27b18
  [25164.312395]  ffffffffa02d0162 ffffea001fc85d40 ffff8807f025bbc8 ffff8807f025bb40
  [25164.312443]  ffff8807f4b27b40 ffffffffa02d0162 ffff8807f025b5d8 ffff8807ef138748
  [25164.312491] Call Trace:
  [25164.312519]  [<ffffffffa02d0162>] snd_info_disconnect+0x42/0xd0 [snd]
  [25164.312561]  [<ffffffffa02d0162>] snd_info_disconnect+0x42/0xd0 [snd]
  [25164.312602]  [<ffffffffa02d0162>] snd_info_disconnect+0x42/0xd0 [snd]
  [25164.312644]  [<ffffffffa02d11f6>] snd_info_card_disconnect+0x46/0x60 [snd]
  [25164.312688]  [<ffffffffa02ce86d>] snd_card_disconnect+0x13d/0x1e0 [snd]
  [25164.312731]  [<ffffffffa05254f8>] usb_audio_disconnect+0x98/0x1d0 [snd_usb_audio]
  [25164.312776]  [<ffffffff8154b3e4>] usb_unbind_interface+0x64/0x1c0
  [25164.312813]  [<ffffffff8149766f>] __device_release_driver+0x7f/0xf0
  [25164.312849]  [<ffffffff81497703>] device_release_driver+0x23/0x30
  [25164.312884]  [<ffffffff81496f88>] bus_remove_device+0x108/0x180
  [25164.312919]  [<ffffffff81493a39>] device_del+0x129/0x1c0
  [25164.312951]  [<ffffffff81548dc0>] usb_disable_device+0xb0/0x290
  [25164.312987]  [<ffffffff8153d80d>] usb_disconnect+0xad/0x200
  [25164.313020]  [<ffffffff81540395>] hub_port_connect_change+0xd5/0xb50
  [25164.313057]  [<ffffffff815477c4>] ? usb_control_msg+0xd4/0x110
  [25164.313094]  [<ffffffff815412e4>] hub_events+0x4d4/0xa30
  [25164.313126]  [<ffffffff81541875>] hub_thread+0x35/0x160
  [25164.313159]  [<ffffffff810ab0b0>] ? prepare_to_wait_event+0x100/0x100
  [25164.313196]  [<ffffffff81541840>] ? hub_events+0xa30/0xa30
  [25164.313228]  [<ffffffff8108b572>] kthread+0xd2/0xf0
  [25164.313257]  [<ffffffff8108b4a0>] ? kthread_create_on_node+0x1c0/0x1c0
  [25164.313295]  [<ffffffff817318bc>] ret_from_fork+0x7c/0xb0
  [25164.313326]  [<ffffffff8108b4a0>] ? kthread_create_on_node+0x1c0/0x1c0
  [25164.313362] Code: e9 67 ff ff ff 0f 1f 40 00 0f 1f 44 00 00 55 48 89 e5 41 55 49 89 fd 41 54 4c 8d a7 88 00 00 00 53 48 8b 87 88 00 00 00 4c 39 e0 <48> 8b 18 75 0f eb 21 0f 1f 80 00 00 00 00 48 89 d8 48 89 d3 48 
  [25164.313614] RIP  [<ffffffffa02d0142>] snd_info_disconnect+0x22/0xd0 [snd]
  [25164.313660]  RSP <ffff8807f4b27ad8>
  [25164.313680] CR2: 0000000000000000
  [25164.467559] ---[ end trace 55c6f127d180b7ea ]---

  System uptime 7h42m. (Reboot caused by power failure.)
  Bug triggered by powering on external USB sound card (Benchmark DAC2 in USB2.0 mode)
  lsusb -v is now hanging

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