Commits
Takashi Iwai committed 0bfe5e434e6
ALSA: usb-audio: Check mixer unit descriptors more strictly We've had some sanity checks of the mixer unit descriptors but they are too loose and some corner cases are overlooked. Add more strict checks in uac_mixer_unit_get_channels() for avoiding possible OOB accesses by malformed descriptors. This also changes the semantics of uac_mixer_unit_get_channels() slightly. Now it returns zero for the cases where the descriptor lacks of bmControls instead of -EINVAL. Then the caller side skips the mixer creation for such unit while it keeps parsing it. This corresponds to the case like Maya44. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>