kernel/linux.git/sound/usb, branch v6.19.12

usb: host: xhci-sideband: delegate offload_usage tracking to class drivers

2026-04-11T12:29:49+00:00

commit 5abbe6ecc6203355c770bf232ade88e29c960049 upstream. Remove usb_offload_get() and usb_offload_put() from the xHCI sideband interrupter creation and removal paths. The responsibility of manipulating offload_usage now lies entirely with the USB class drivers. They have the precise context of when an offload data stream actually starts and stops, ensuring a much more accurate representation of offload activity for power management. Cc: stable Fixes: ef82a4803aab ("xhci: sideband: add api to trace sideband usage") Signed-off-by: Guan-Yu Lin Tested-by: Hailong Liu Tested-by: hailong.liu@oppo.com Acked-by: Mathias Nyman Link: https://patch.msgid.link/20260401123238.3790062-3-guanyulin@google.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman

ALSA: caiaq: fix stack out-of-bounds read in init_card

2026-04-11T12:29:40+00:00

commit 45424e871abf2a152e247a9cff78359f18dd95c0 upstream. The loop creates a whitespace-stripped copy of the card shortname where `len < sizeof(card->id)` is used for the bounds check. Since sizeof(card->id) is 16 and the local id buffer is also 16 bytes, writing 16 non-space characters fills the entire buffer, overwriting the terminating nullbyte. When this non-null-terminated string is later passed to snd_card_set_id() -> copy_valid_id_string(), the function scans forward with `while (*nid && ...)` and reads past the end of the stack buffer, reading the contents of the stack. A USB device with a product name containing many non-ASCII, non-space characters (e.g. multibyte UTF-8) will reliably trigger this as follows: BUG: KASAN: stack-out-of-bounds in copy_valid_id_string sound/core/init.c:696 [inline] BUG: KASAN: stack-out-of-bounds in snd_card_set_id_no_lock+0x698/0x74c sound/core/init.c:718 The off-by-one has been present since commit bafeee5b1f8d ("ALSA: snd_usb_caiaq: give better shortname") from June 2009 (v2.6.31-rc1), which first introduced this whitespace-stripping loop. The original code never accounted for the null terminator when bounding the copy. Fix this by changing the loop bound to `sizeof(card->id) - 1`, ensuring at least one byte remains as the null terminator. Fixes: bafeee5b1f8d ("ALSA: snd_usb_caiaq: give better shortname") Cc: stable@vger.kernel.org Cc: Andrey Konovalov Reported-by: Berk Cem Goksel Signed-off-by: Berk Cem Goksel Link: https://patch.msgid.link/20260329133825.581585-1-berkcgoksel@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Exclude Scarlett 2i2 1st Gen (8016) from SKIP_IFACE_SETUP

2026-04-11T12:29:29+00:00

[ Upstream commit a0dafdbd1049a8ea661a1a471be1b840bd8aed13 ] Same issue as the other 1st Gen Scarletts: QUIRK_FLAG_SKIP_IFACE_SETUP causes distorted audio on this revision of the Scarlett 2i2 1st Gen (1235:8016). Fixes: 38c322068a26 ("ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP") Reported-by: lukas-reineke [https://github.com/geoffreybennett/linux-fcp/issues/54] Signed-off-by: Geoffrey D. Bennett Link: https://patch.msgid.link/acytr8aEUba4VXmZ@m.b4.vu Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

ALSA: usb-audio: Exclude Scarlett Solo 1st Gen from SKIP_IFACE_SETUP

2026-04-11T12:29:26+00:00

[ Upstream commit f025ac8c698ac7d29eb3b5025bcdaf7ad675785d ] Same issue that the Scarlett 2i2 1st Gen had: QUIRK_FLAG_SKIP_IFACE_SETUP causes distorted audio on the Scarlett Solo 1st Gen (1235:801c). Fixes: 38c322068a26 ("ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP") Reported-by: Dag Smedberg Tested-by: Dag Smedberg Signed-off-by: Dag Smedberg Link: https://patch.msgid.link/20260329170420.4122-1-dag@dsmedberg.se Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

ALSA: usb-audio: Exclude Scarlett 2i4 1st Gen from SKIP_IFACE_SETUP

2026-04-02T11:25:37+00:00

[ Upstream commit 990a8b0732cf899d4a0f847b0a67efeb9a384c82 ] Same issue that the Scarlett 2i2 1st Gen had: QUIRK_FLAG_SKIP_IFACE_SETUP causes distorted/flanging audio on the Scarlett 2i4 1st Gen (1235:800a). Fixes: 38c322068a26 ("ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP") Reported-by: dcferreira [https://github.com/geoffreybennett/linux-fcp/issues/54] Signed-off-by: Geoffrey D. Bennett Link: https://patch.msgid.link/acEkEbftzyNe8W7C@m.b4.vu Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

ALSA: usb-audio: Exclude Scarlett 2i2 1st Gen from SKIP_IFACE_SETUP

2026-04-02T11:25:32+00:00

[ Upstream commit 8780f561f6717dec52351251881bff79e960eb46 ] The Focusrite Scarlett 2i2 1st Gen (1235:8006) produces distorted/silent audio when QUIRK_FLAG_SKIP_IFACE_SETUP is active, as that flag causes the feedback format to be detected as 17.15 instead of 16.16. Add a DEVICE_FLG entry for this device before the Focusrite VENDOR_FLG entry so that it gets no quirk flags, overriding the vendor-wide SKIP_IFACE_SETUP. This device doesn't have the internal mixer, Air, or Safe modes that the quirk was designed to protect. Fixes: 38c322068a26 ("ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP") Reported-by: pairomaniac [https://github.com/geoffreybennett/linux-fcp/issues/54] Tested-by: pairomaniac [https://github.com/geoffreybennett/linux-fcp/issues/54] Signed-off-by: Geoffrey D. Bennett Link: https://patch.msgid.link/abmsTjKmQMKbhYtK@m.b4.vu Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

ALSA: usb-audio: Add iface reset and delay quirk for SPACETOUCH USB Audio

2026-04-02T11:25:22+00:00

[ Upstream commit 5182e5ec4355dd690307f5d5c28cbfc5b2c06a97 ] Setting up the interface when suspended/resumeing fail on this card. Adding a reset and delay quirk will eliminate this problem. usb 1-1: New USB device found, idVendor=0666, idProduct=0880 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: USB Audio usb 1-1: Manufacturer: SPACETOUCH usb 1-1: SerialNumber: 000000000 Signed-off-by: Lianqin Hu Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/TYUPR06MB6217ACC80B70BE25D87456B0D247A@TYUPR06MB6217.apcprd06.prod.outlook.com Signed-off-by: Sasha Levin

ALSA: usb-audio: Improve Focusrite sample rate filtering

2026-03-19T15:15:07+00:00

[ Upstream commit 24d2d3c5f94007a5a0554065ab7349bb69e28bcb ] Replace the bLength == 10 max_rate check in focusrite_valid_sample_rate() with filtering that also examines the bmControls VAL_ALT_SETTINGS bit. When VAL_ALT_SETTINGS is readable, the device uses strict per-altsetting rate filtering (only the highest rate pair for that altsetting is valid). When it is not readable, all rates up to max_rate are valid. For devices without the bLength == 10 Format Type descriptor extension but with VAL_ALT_SETTINGS readable and multiple altsettings (only seen in Scarlett 18i8 3rd Gen playback), fall back to the Focusrite convention: alt 1 = 48kHz, alt 2 = 96kHz, alt 3 = 192kHz. This produces correct rate tables for all tested Focusrite devices (all Scarlett 2nd, 3rd, and 4th Gen, Clarett+, and Vocaster) using only USB descriptors, allowing QUIRK_FLAG_VALIDATE_RATES to be removed for Focusrite in the next commit. Signed-off-by: Geoffrey D. Bennett Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/7e18c1f393a6ecb6fc75dd867a2c4dbe135e3e22.1771594828.git.g@b4.vu Signed-off-by: Sasha Levin

ALSA: usb-audio: Check endpoint numbers at parsing Scarlett2 mixer interfaces

2026-03-19T15:15:00+00:00

commit df1d8abf36ca3681c21a6809eaa9a1e01ef897a6 upstream. The Scarlett2 mixer quirk in USB-audio driver may hit a NULL dereference when a malformed USB descriptor is passed, since it assumes the presence of an endpoint in the parsed interface in scarlett2_find_fc_interface(), as reported by fuzzer. For avoiding the NULL dereference, just add the sanity check of bNumEndpoints and skip the invalid interface. Reported-by: syzbot+8f29539ef9a1c8334f42@syzkaller.appspotmail.com Closes: https://lore.kernel.org/69acbbe1.050a0220.310d8.0001.GAE@google.com Reported-by: syzbot+ae893a8901067fde2741@syzkaller.appspotmail.com Closes: https://lore.kernel.org/69acf72a.050a0220.310d8.0004.GAE@google.com Cc: Link: https://patch.msgid.link/20260309104632.141895-1-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Check max frame size for implicit feedback mode, too

2026-03-19T15:14:48+00:00

[ Upstream commit 7cb2a5422f5bbdf1cf32eae0eda41000485b9346 ] When the packet sizes are taken from the capture stream in the implicit feedback mode, the sizes might be larger than the upper boundary defined by the descriptor. As already done for other transfer modes, we have to cap the sizes accordingly at sending, otherwise this would lead to an error in USB core at submission of URBs. Link: https://bugzilla.kernel.org/show_bug.cgi?id=221076 Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20260225085233.316306-3-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin