[Pkg-alsa-devel] Bug#781780: alsa-utils: General protection fault snd-usb-audio: rawmidi drain error (avail = 32, buffer_size = 4096)

A.W. frozensys at gmail.com
Thu Apr 2 23:06:40 UTC 2015 

Package: alsa-utils
Version: 1.0.28-1
Severity: critical
Justification: breaks unrelated software

Dear Maintainer,

I might have found an issue with USB-MIDI devices

   * What led up to the situation?
     using pygame.midi to spit out note_on's to an Akai APC mini
     (in an endless loop, without sleep()s, to test/fuzz it)


   * What was the outcome of this action?
     General protection fault in dmesg
     lsusb hangs...

   * What outcome did you expect instead?
     Flicker of a led / Akai device hangs?

Apparently the USB-Midi device froze and the system did not handle that
gracefuly?

Linux xxx 3.16-3-amd64 #1 SMP Debian 3.16.5-1 (2014-10-10) x86_64 GNU/Linux

dmesg:
[718511.056117] usb 3-1: new full-speed USB device number 10 using uhci_hcd
[718511.225616] usb 3-1: New USB device found, idVendor=09e8, idProduct=0028
[718511.225627] usb 3-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[718511.225634] usb 3-1: Product: APC MINI
[718511.225639] usb 3-1: Manufacturer: AKAI PROFESSIONAL,LP
[718511.225645] usb 3-1: SerialNumber: Ver00.10
[718859.797956] ALSA: seq_midi: MIDI output buffer overrun
[718859.797967] ALSA: seq_midi: MIDI output buffer overrun
[718859.797974] ALSA: seq_midi: MIDI output buffer overrun
[718859.797982] ALSA: seq_midi: MIDI output buffer overrun
[718859.797988] ALSA: seq_midi: MIDI output buffer overrun
[718859.797996] ALSA: seq_midi: MIDI output buffer overrun
[718859.798003] ALSA: seq_midi: MIDI output buffer overrun
[718859.798011] ALSA: seq_midi: MIDI output buffer overrun
[718859.798018] ALSA: seq_midi: MIDI output buffer overrun
[718860.884089] usb 3-1: USB disconnect, device number 10
[718865.996043] ALSA: seq_lock: timeout [1 left] in /build/linux-
i5neKT/linux-3.16.5/sound/core/seq/seq_ports.c:264
[718870.884114] snd-usb-audio 3-1:1.0: rawmidi drain error (avail = 32,
buffer_size = 4096)
[718870.884189] general protection fault: 0000 [#1] SMP
[718870.884278] Modules linked in: snd_hrtimer snd_seq_midi snd_seq_midi_event
snd_seq_dummy snd_seq mxl5005s ec100 $
[718870.885584]  ehci_hcd cfg80211 e1000e snd_hda_codec usbcore snd_hwdep
snd_pcm drm_kms_helper usb_common thinkpad$
[718870.886488] CPU: 1 PID: 327 Comm: khubd Tainted: G        W  O
3.16-3-amd64 #1 Debian 3.16.5-1
[718870.886597] Hardware name: LENOVO        /       , BIOS 7WET71WW (3.21 )
11/29/2012
[718870.886693] task: ffff880232b342d0 ti: ffff880231990000 task.ti:
ffff880231990000
[718870.886786] RIP: 0010:[<ffffffffa0b246a7>]  [<ffffffffa0b246a7>]
clear_subscriber_list+0x1d7/0x230 [snd_seq]
[718870.886922] RSP: 0018:ffff880231993950  EFLAGS: 00010246
[718870.886988] RAX: dead000000100100 RBX: ffff88010b86ea00 RCX:
dead000000100100
[718870.887078] RDX: dead000000200200 RSI: 0000000000000246 RDI:
ffff88010b86ea80
[718870.887166] RBP: ffff88011a577240 R08: 0000000000000000 R09:
6475612d6273752d
[718870.887254] R10: 00000000000040f0 R11: 313a312d33206f69 R12:
ffff880231b47ac0
[718870.887342] R13: ffff88010b86ea68 R14: ffff88010b86ea80 R15:
ffff88011a5772a0
[718870.887432] FS:  0000000000000000(0000) GS:ffff88023bc80000(0000)
knlGS:0000000000000000
[718870.887530] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[718870.887605] CR2: 00007f0e54390000 CR3: 0000000001813000 CR4:
00000000000407e0
[718870.887693] Stack:
[718870.887721]  ffff880012f3ec00 ffff880231b47a00 ffff880231b47ac0
0000000131993986
[718870.887834]  ffff880231b47b10 ffff880231b47ad0 ffff88007b27b700
ffff880231b47a00
[718870.887945]  ffff880012f3ec00 ffff880231993ac8 ffffffffffffffff
ffff88011ab6d000
[718870.888057] Call Trace:
[718870.888078]  [<ffffffffa0b24751>] ? port_delete+0x51/0x80 [snd_seq]
[718870.888078]  [<ffffffffa0b1e103>] ? snd_seq_ioctl_delete_port+0x53/0xa0
[snd_seq]
[718870.888078]  [<ffffffffa0b1ead2>] ? snd_seq_kernel_client_ctl+0x42/0x60
[snd_seq]
[718870.888078]  [<ffffffffa0b24216>] ? snd_seq_event_port_detach+0x46/0x70
[snd_seq]
[718870.888078]  [<ffffffffa0b3101d>] ? snd_seq_midisynth_delete+0x1d/0x40
[snd_seq_midi]
[718870.888078]  [<ffffffffa0b310c4>] ?
snd_seq_midisynth_unregister_port+0x84/0x100 [snd_seq_midi]
[718870.888078]  [<ffffffffa08262b3>] ? free_device+0x43/0xb0 [snd_seq_device]
[718870.888078]  [<ffffffffa0826759>] ? snd_seq_device_dev_disconnect+0x29/0x50
[snd_seq_device]
[718870.888078]  [<ffffffffa024ca58>] ?
__snd_device_disconnect.part.1+0x18/0x50 [snd]
[718870.888078]  [<ffffffffa024cd2f>] ? snd_device_disconnect_all+0x3f/0x60
[snd]
[718870.888078]  [<ffffffffa0246973>] ? snd_card_disconnect+0x153/0x1d0 [snd]
[718870.888078]  [<ffffffffa082b508>] ? usb_audio_disconnect+0x78/0x1a0
[snd_usb_audio]
[718870.888078]  [<ffffffffa033976c>] ? usb_unbind_interface+0x6c/0x2b0
[usbcore]
[718870.888078]  [<ffffffff8139ea7a>] ? __device_release_driver+0x7a/0xf0
[718870.888078]  [<ffffffff8139eb0e>] ? device_release_driver+0x1e/0x30
[718870.888078]  [<ffffffff8139e413>] ? bus_remove_device+0x103/0x180
[718870.888078]  [<ffffffff8139aeb6>] ? device_del+0x116/0x1b0
[718870.888078]  [<ffffffffa03371d0>] ? usb_disable_device+0xa0/0x280 [usbcore]
[718870.927232]  [<ffffffffa032cdf1>] ? usb_disconnect+0x91/0x280 [usbcore]
[718870.927232]  [<ffffffffa032f36c>] ? hub_thread+0xaac/0x1730 [usbcore]
[718870.927232]  [<ffffffff8109d3c0>] ? check_preempt_wakeup+0x120/0x1d0
[718870.927232]  [<ffffffff810a5800>] ? prepare_to_wait_event+0xf0/0xf0
[718870.927232]  [<ffffffffa032e8c0>] ? hub_port_debounce+0x130/0x130 [usbcore]
[718870.927232]  [<ffffffff81085ddd>] ? kthread+0xbd/0xe0
[718870.927232]  [<ffffffff81085d20>] ? kthread_create_on_node+0x180/0x180
[718870.927232]  [<ffffffff8150c6fc>] ? ret_from_fork+0x7c/0xb0
[718870.927232]  [<ffffffff81085d20>] ? kthread_create_on_node+0x180/0x180
[718870.927232]  [<ffffffff8150c6fc>] ? ret_from_fork+0x7c/0xb0
[718870.927232]  [<ffffffff81085d20>] ? kthread_create_on_node+0x180/0x180
[718870.927232] Code: ff 48 85 db 74 46 4c 8d b3 80 00 00 00 4c 8d 6b 68 4c 89
f7 e8 6b 6a 9e e0 49 8b 4f f0 49 8b 5$
[718870.927232] RIP  [<ffffffffa0b246a7>] clear_subscriber_list+0x1d7/0x230
[snd_seq]
[718870.927232]  RSP <ffff880231993950>
[718870.993281] ---[ end trace 1c27bf870f3c2c8c ]---
[718871.188057] ALSA: seq_lock: timeout [1 left] in /build/linux-
i5neKT/linux-3.16.5/sound/core/seq/seq_clientmgr.c:$






-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armel, mips

Kernel: Linux 3.16-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages alsa-utils depends on:
ii  kmod            20-1
ii  libasound2      1.0.28-1
ii  libc6           2.19-17
ii  libncursesw5    5.9+20140913-1+b1
ii  libsamplerate0  0.1.8-8
ii  libtinfo5       5.9+20140913-1+b1
ii  lsb-base        4.1+Debian13+nmu1
ii  whiptail        0.52.17-1+b1

alsa-utils recommends no packages.

alsa-utils suggests no packages.

-- no debconf information

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