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  1. 28 6月, 2013 1 次提交
  3. 29 4月, 2013 1 次提交
  5. 18 4月, 2013 1 次提交
    • D
      ALSA: snd-usb: add quirks handler for DSD streams · 126825e7
      由 Daniel Mack 提交于 
      Unfortunately, none of the UAC standards provides a way to identify DSD
(Direct Stream Digital) formats. Hence, this patch adds a quirks
handler to identify USB interfaces that are capable of handling DSD.

That quirks handler can augment the already parsed formats bit-field,
by any of the new SNDRV_PCM_FMTBIT_DSD_{U8_U16} and setting the dsd_dop
flag in the audio format, if the driver should take care for the DOP
byte stuffing.

The only devices that are known to work with this are the ones with
a 'Playback Designs' vendor id.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      126825e7
  7. 04 4月, 2013 1 次提交
  9. 18 3月, 2013 2 次提交
  11. 21 11月, 2012 1 次提交
  13. 15 2月, 2012 1 次提交
  15. 08 1月, 2012 1 次提交
    • X
      ALSA: usb-audio: fix possible hang and overflow in parse_uac2_sample_rate_range() · 4fa0e81b
      由 Xi Wang 提交于 
      A malicious USB device may feed in carefully crafted min/max/res values,
so that the inner loop in parse_uac2_sample_rate_range() could run for
a long time or even never terminate, e.g., given max = INT_MAX.

Also nr_rates could be a large integer, which causes an integer overflow
in the subsequent call to kmalloc() in parse_audio_format_rates_v2().
Thus, kmalloc() would allocate a smaller buffer than expected, leading
to a memory corruption.

To exploit the two vulnerabilities, an attacker needs physical access
to the machine to plug in a malicious USB device.

This patch makes two changes.

1) The type of "rate" is changed to unsigned int, so that the loop could
   stop once "rate" is larger than INT_MAX.

2) Limit nr_rates to 1024.
Suggested-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NXi Wang <xi.wang@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      4fa0e81b
  17. 27 9月, 2011 1 次提交
  19. 18 5月, 2011 1 次提交
  21. 29 4月, 2011 1 次提交
  23. 10 1月, 2011 1 次提交
  25. 04 9月, 2010 1 次提交
    • C
      ALSA: usb-audio: fix detection of vendor-specific device protocol settings · a2acad82
      由 Clemens Ladisch 提交于 
      The Audio Class v2 support code in 2.6.35 added checks for the
bInterfaceProtocol field.  However, there are devices (usually those
detected by vendor-specific quirks) that do not have one of the
predefined values in this field, which made the driver reject them.

To fix this regression, restore the old behaviour, i.e., assume that
a device with an unknown bInterfaceProtocol field (other than
UAC_VERSION_2) has more or less UAC-v1-compatible descriptors.

[compile warning fixes by tiwai]
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: <stable@kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      a2acad82
  27. 15 8月, 2010 1 次提交
    • D
      ALSA: sound/usb/format: silence uninitialized variable warnings · 38d7b08f
      由 Dan Carpenter 提交于 
      Gcc complains that ret might be used uninitialized:

sound/usb/format.c: In function ‘snd_usb_parse_audio_format’:
sound/usb/format.c:354: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:354: note: ‘ret’ was declared here
sound/usb/format.c:414: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:414: note: ‘ret’ was declared here

I suppose it could be uninitialized if there is ever a UAC_VERSION_3
released. Anyway this patch is worthwhile if only to silence the gcc
warning.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NDaniel Mack <daniel@caiaq.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      38d7b08f
  29. 23 6月, 2010 1 次提交
  31. 12 6月, 2010 3 次提交
  33. 01 6月, 2010 1 次提交
    • D
      ALSA: usb-audio: parse clock topology of UAC2 devices · 79f920fb
      由 Daniel Mack 提交于 
      Audio devices which comply to the UAC2 standard can export complex clock
topologies in its descriptors and set up links between them.

The entities that are defined are

 - clock sources, which define the end-leafs.
 - clock selectors, which act as switch to select one out of many
   possible clocks sources.
 - clock multipliers, which have an input clock source, and act as clock
   source again. They can be used to derive one clock from another.

All sample rate changes, clock validity queries and the like must go to
clock source elements, while clock selectors and multipliers can be used
as terminal clock source.

The following patch adds a parser for these elements and functions to
iterate over the tree and find the leaf nodes (clock sources).

The samplerate set functions were moved to the new clock.c file.
Signed-off-by: NDaniel Mack <daniel@caiaq.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      79f920fb
  35. 27 5月, 2010 2 次提交
  37. 29 3月, 2010 1 次提交
  39. 12 3月, 2010 2 次提交
  41. 05 3月, 2010 3 次提交