ALSA: compress: add missing OPEN-state gate to SET_METADATA

snd_compr_set_metadata() calls stream->ops->set_metadata() straight
after copy_from_user(), without ever checking runtime->state, even
though the function's own comment says a parameter change should only
be allowed once the stream has left the OPEN state. Every other
metadata/param entry point in this file (SET_PARAMS, WRITE, ...)
enforces that gate.

A codec driver's set_metadata callback can assume SET_PARAMS has
already run and initialised its private state; calling it while the
stream is still OPEN can operate on that uninitialised state.

Add the OPEN-state check the existing comment already documents.

Fixes: 9727b490e543 ("ALSA: compress: add support for gapless playback")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://patch.msgid.link/20261019144533.30665-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions