kernel/linux.git/sound/drivers, branch v6.19.11

ALSA: aloop: Fix racy access at PCM trigger

2026-02-03T14:22:21+00:00

The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are performed outside the cable lock, this may result in UAF when a program attempts to trigger frequently while opening/closing the tied stream, as spotted by fuzzers. For addressing the UAF, this patch changes two things: - It covers the most of code in loopback_check_format() with cable->lock spinlock, and add the proper NULL checks. This avoids already some racy accesses. - In addition, now we try to check the state of the capture PCM stream that may be stopped in this function, which was the major pain point leading to UAF. Reported-by: syzbot+5f8f3acdee1ec7a7ef7b@syzkaller.appspotmail.com Closes: https://lore.kernel.org/69783ba1.050a0220.c9109.0011.GAE@google.com Cc: Link: https://patch.msgid.link/20260203141003.116584-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: pcmtest: Replace deprecated strcpy with strscpy_pad in setup_patt_bufs

2025-11-19T16:16:49+00:00

strcpy() has been deprecated [1] because it performs no bounds checking on the destination buffer, which can lead to buffer overflows. Replace it with the safer strscpy_pad(), and use kmalloc() instead of kzalloc() because strscpy_pad() zero-pads the destination buffer and therefore avoids writing to it twice. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by: Thorsten Blum Link: https://patch.msgid.link/20251119135217.233084-1-thorsten.blum@linux.dev Signed-off-by: Takashi Iwai

ALSA: serial-generic: remove shared static buffer

2025-09-15T10:33:53+00:00

If multiple instances of this driver are instantiated and try to send concurrently then the single static buffer snd_serial_generic_tx_work() will cause corruption in the data output. Move the buffer into the per-instance driver data to avoid this. Signed-off-by: John Keeping Signed-off-by: Takashi Iwai

ALSA: serial-u16550: Use guard() for spin locks

2025-09-01T11:53:35+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-14-tiwai@suse.de

ALSA: portman2x4: Use guard() for spin locks

2025-09-01T11:53:35+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-13-tiwai@suse.de

ALSA: mts64: Use guard() for spin locks

2025-09-01T11:53:35+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-12-tiwai@suse.de

ALSA: mtpav: Use guard() for spin locks

2025-09-01T11:53:35+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-11-tiwai@suse.de

ALSA: mpu401: Use guard() for spin locks

2025-09-01T11:53:34+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-10-tiwai@suse.de

ALSA: dummy: Use guard() for spin locks

2025-09-01T11:53:34+00:00

Clean up the code using guard() for spin locks. Merely code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-9-tiwai@suse.de

ALSA: vx: Use guard() for mutex locks

2025-09-01T11:53:34+00:00

Replace the manual mutex lock/unlock pairs with guard() for code simplification. Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250829150026.6379-8-tiwai@suse.de