kernel.git/sound/usb/stream.c, branch linux-5.0.y

ALSA: usb-audio: Always check descriptor sizes in parser code

2019-01-07T10:10:17Z

There are a few places where we access the data without checking the actual object size from the USB audio descriptor. This may result in OOB access, as recently reported. This patch addresses these missing checks. Most of added codes are simple bLength checks in the caller side. For the input and output terminal parsers, we put the length check in the parser functions. For the input terminal, a new argument is added to distinguish between UAC1 and the rest, as they treat different objects. Reported-by: Mathias Payer Reported-by: Hui Peng Tested-by: Hui Peng Cc: Signed-off-by: Takashi Iwai

ALSA: usb-audio: Fix invalid use of sizeof in parse_uac_endpoint_attributes()

2018-08-02T05:26:37Z

sizeof() when applied to a pointer typed expression gives the size of the pointer, not that of the pointed data. Fixes: 7edf3b5e6a45 ("ALSA: usb-audio: AudioStreaming Power Domain parsing") Signed-off-by: Wei Yongjun Signed-off-by: Takashi Iwai

ALSA: usb-audio: Operate UAC3 Power Domains in PCM callbacks

2018-07-31T13:01:45Z

Make use of UAC3 Power Domains associated to an Audio Streaming path within the PCM's logic. This means, when there is no audio being transferred (pcm is closed), the host will set the Power Domain associated to that substream to state D1. When audio is being transferred (from hw_params onwards), the Power Domain will be set to D0 state. This is the way the host lets the device know which Terminal is going to be actively used and it is for the device to manage its own internal resources on that UAC3 Power Domain. Note the resume method now sets the Power Domain to D1 state as resuming the device doesn't mean audio streaming will occur. Signed-off-by: Jorge Sanjuan Signed-off-by: Takashi Iwai

ALSA: usb-audio: AudioStreaming Power Domain parsing

2018-07-31T13:01:30Z

Power Domains in the UAC3 spec are mainly intended to be associated to an Input or Output Terminal so the host changes the power state of the entire capture or playback path within the topology. This patch adds support for finding Power Domains associated to an Audio Streaming Interface (bTerminalLink) and adds a reference to them in the usb audio substreams (snd_usb_substream). Signed-off-by: Jorge Sanjuan Signed-off-by: Takashi Iwai

ALSA: usb-audio: Allow non-vmalloc buffer for PCM buffers

2018-05-29T08:01:54Z

Currently, USB-audio driver allocates the PCM buffer via vmalloc(), as this serves merely as an intermediate buffer that is copied to each URB transfer buffer. This works well in general on x86, but on some archs this may result in cache coherency issues when mmap is used. OTOH, it works also on such arch unless mmap is used. This patch is a step for mitigating the inconvenience; a new module option "use_vmalloc" is provided so that user can choose to allocate the DMA coherent buffer instead of the existing vmalloc buffer. The drawback is that it'd be the standard dma_alloc_coherent() calls and the system would require contiguous pages on non-x86 archs. Note that it's a global option and not dynamically switchable since the buffer is pre-allocated at the probe time. In theory, it's possible to be switchable, but it'd be trickier and racier. As default use_vmalloc option is set to true, so that the old behavior is kept. For allowing the coherent mmap on ARM or MIPS, pass use_vmalloc=0 option explicitly. Reported-and-tested-by: Daniel Danzberger Signed-off-by: Takashi Iwai

ALSA: usb: stream: fix potential memory leak during uac3 interface parsing

2018-05-18T06:40:40Z

UAC3 channel map is created during interface parsing, and in some cases was not freed in failure paths. Reported-by: Dan Carpenter Signed-off-by: Ruslan Bilovol Signed-off-by: Takashi Iwai

Merge branch 'for-linus' into for-next

2018-05-15T05:30:23Z

Back-merge of UAC3 fixes for applying further enhancements. Signed-off-by: Takashi Iwai

ALSA: usb-audio: Use Class Specific EP for UAC3 devices.

2018-05-15T05:29:10Z

bmAtributes offset doesn't exist in the UAC3 CS_EP descriptor. Hence, checking for pitch control as if it was UAC2 doesn't make any sense. Use the defined UAC3 offsets instead. Fixes: 9a2fe9b801f5 ("ALSA: usb: initial USB Audio Device Class 3.0 support") Signed-off-by: Jorge Sanjuan Reviewed-by: Ruslan Bilovol Signed-off-by: Takashi Iwai

ALSA: usb: add UAC3 BADD profiles support

2018-05-13T06:54:35Z

Recently released USB Audio Class 3.0 specification contains BADD (Basic Audio Device Definition) document which describes pre-defined UAC3 configurations. BADD support is mandatory for UAC3 devices, it should be implemented as a separate USB device configuration. As per BADD document, class-specific descriptors shall not be included in the Device’s Configuration descriptor ("inferred"), but host can guess them from BADD profile number, number of endpoints and their max packed sizes. This patch adds support of all BADD profiles from the spec Signed-off-by: Ruslan Bilovol Tested-by: Jorge Sanjuan Signed-off-by: Takashi Iwai

ALSA: usb: stream: refactor uac3 audio interface parsing

2018-05-04T07:39:12Z

Offload snd_usb_parse_audio_interface() function which became quite long after adding UAC3 spec support. Move class-specific parts of uac3 parsing to separate function which now produce audioformat structure that is ready to be fed to snd_usb_add_audio_stream(). Signed-off-by: Ruslan Bilovol Signed-off-by: Takashi Iwai