kernel/linux.git/sound/usb, branch master

ALSA: usb-audio: Fix quirk entry placement for PreSonus AudioBox USB

2026-04-29T05:46:54+00:00

The quirk entry for PreSonus AudioBox USB was mistakenly placed inside a disabled #if 0 block. Move it to the correct position after the Fixes: 34fe4a9df247 ("ALSA: usb-audio: Add quirk for PreSonus AudioBox USB") Signed-off-by: Abhinav Mahadevan Link: https://patch.msgid.link/20260428155117.5170-1-abhi220204@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

2026-04-28T06:14:21+00:00

The convert_chmap_v3() has a loop with its increment size of cs_desc->wLength, but we forgot to validate cs_desc->wLength itself, which may lead to potential endless loop by a malformed descriptor. Add a proper size check to abort the loop for plugging the hole. Fixes: ecfd41166b72 ("ALSA: usb-audio: Validate UAC3 cluster segment descriptors") Cc: Link: https://patch.msgid.link/20260427152224.15276-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: usb-audio: Fix potential leak of pd at parsing UAC3 streams

2026-04-28T06:13:50+00:00

At parsing UAC3 streams, we allocate a PD object at each time, and either assign or free it. But there is a case where the PD object may be leaked; namely, in __snd_usb_parse_audio_interface() loop, when an audioformat shares the same endpoint with others, it's put to a link and returns from snd_usb_add_audio_stream(), but the PD is forgotten afterwards. Overall, the treatment of PD object in the parser code is a bit flaky, and we should be more careful about the object ownership. This patch tries to fix the above case and improve the code a bit. The pd object is now managed with the auto-cleanup in the loop, and the ownership is updated when the pd object gets assigned to the stream, which guarantees the release of the leftover object. Fixes: 7edf3b5e6a45 ("ALSA: usb-audio: AudioStreaming Power Domain parsing") Link: https://patch.msgid.link/20260427151508.12544-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: caiaq: Don't abort when no input device is available

2026-04-28T06:13:33+00:00

The previous fix to handle the error from setup_card() caused a regression for the models that have no dedicated input device; snd_usb_caiaq_input_init() just returns -EINVAL, and we treat it as a fatal error although it should be ignored. As a regression fix, change the error code to -ENODEV, and ignore this error in the callee, to continue probing. Fixes: 28abd224db4a ("ALSA: caiaq: Handle probe errors properly") Cc: Link: https://bugzilla.kernel.org/show_bug.cgi?id=221423 Link: https://patch.msgid.link/20260427145642.6637-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: caiaq: Fix potentially leftover ep1_in_urb at error path

2026-04-28T06:12:58+00:00

The previous fix for handling the error from setup_card() missed that an internal URB cdev->ep1_in_urb might have been already submitted beforehand. In the normal case, this URB gets killed at the disconnection, but in the error path, we didn't do it, hence there can be a potential leak. Fix it in the error path for setup_card(), too. Fixes: 28abd224db4a ("ALSA: caiaq: Handle probe errors properly") Cc: Link: https://patch.msgid.link/20260427123819.890185-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: caiaq: fix usb_dev refcount leak on probe failure

2026-04-27T12:38:50+00:00

create_card() takes a reference on the USB device with usb_get_dev() and stores the matching usb_put_dev() in card_free(), which is installed as the snd_card's ->private_free destructor. However, ->private_free is only assigned near the end of init_card(), after several failure points (usb_set_interface(), EP type checks, usb_submit_urb(), the EP1_CMD_GET_DEVICE_INFO exchange, and its timeout). When any of those fail, init_card() returns an error to snd_probe(), which calls snd_card_free(card). Because ->private_free is still NULL, card_free() never runs, the usb_get_dev() reference is not dropped, and the struct usb_device leaks along with its descriptor allocations and device_private. syzbot reproduces this with a malformed UAC3 device whose only valid altsetting is 0; init_card()'s usb_set_interface(usb_dev, 0, 1) call fails with -EIO and triggers the leak. Move the ->private_free assignment into create_card(), immediately after usb_get_dev(), so that every error path reaching snd_card_free() balances the reference. card_free()'s callees (snd_usb_caiaq_input_free, free_urbs, kfree) already tolerate the partially-initialized state because the chip private area is zero-initialized by snd_card_new(). Fixes: 80bb50e2d459 ("ALSA: caiaq: take a reference on the USB device in create_card()") Reported-by: syzbot+2afd7e71155c7e241560@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=2afd7e71155c7e241560 Tested-by: syzbot+2afd7e71155c7e241560@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Deepanshu Kartikey Link: https://patch.msgid.link/20260426001934.70813-1-kartikey406@gmail.com Signed-off-by: Takashi Iwai

sound: ua101: fix division by zero at probe

2026-04-27T12:24:41+00:00

Add a missing sanity check for bNrChannels in detect_usb_format() to prevent a division by zero in playback_urb_complete() and capture_urb_complete(). USB core does not validate class-specific descriptor fields such as bNrChannels, so drivers must verify them before use. If a device provides bNrChannels = 0, frame_bytes becomes zero and is later used as a divisor in the URB completion handlers, leading to a kernel crash. Fixes: 63978ab3e3e9 ("sound: add Edirol UA-101 support") Cc: stable@vger.kernel.org Signed-off-by: SeungJu Cheon Link: https://patch.msgid.link/20260426111239.103296-1-suunj1331@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: apply quirk for Playstation PDP Riffmaster

2026-04-27T12:23:34+00:00

This device, just like the Playstation 5's DualSense, has a volume that's too low, hid-playstation solves this by raising the minimum volume on the device itself by sending an output report, third party PS5 controllers/accessories do not support this output report format, so we apply a quirk to raise the minimum volume by 6dB. Signed-off-by: Rosalie Wanders Link: https://patch.msgid.link/20260426025520.3985-2-rosalie@mailbox.org Signed-off-by: Takashi Iwai

ALSA: usb-audio: Fix UAC3 cluster descriptor size check

2026-04-27T11:51:07+00:00

The UAC3 cluster descriptor length check in snd_usb_get_audioformat_uac3()was added to make sure that the buffer is large enough for a struct uac3_cluster_header_descriptor before the returned data is cast and used. However, the check uses sizeof(cluster), where cluster is a pointer, not the size of the descriptor header. This makes the validation depend on the architecture pointer size and does not match the intended object size. Check against sizeof(*cluster) instead. Fixes: fb4e2a6e8f28 ("ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260424-alsa-usb-uac3-cluster-size-v1-1-99a5808898a3@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Fix Audio Advantage Micro II SPDIF switch

2026-04-22T15:52:08+00:00

snd_microii_spdif_switch_put() returns 0 when the requested vendor register value differs from the cached one. This comparison was inverted by the resume-support conversion, so real SPDIF switch toggles are ignored while no-op writes still issue SET_CUR and report success. Return early only when the requested value matches the cached one. Fixes: 288673beae6c ("ALSA: usb-audio: Add resume support for MicroII SPDIF ctls") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260421-microii-spdif-switch-fix-v1-1-5c50dc28b88f@gmail.com Signed-off-by: Takashi Iwai