ASoC: SOF: stream-ipc: Check for cstream nullity in sof_ipc_msg_data()

ASoC: SOF: stream-ipc: Check for cstream nullity in sof_ipc_msg_data()

commit d8d99c3b5c485f339864aeaa29f76269cc0ea975 upstream.

The nullity of sps->cstream should be checked similarly as it is done in
sof_set_stream_data_offset() function.
Assuming that it is not NULL if sps->stream is NULL is incorrect and can
lead to NULL pointer dereference.

Fixes: 090349a9feba ("ASoC: SOF: Add support for compress API for stream data/offset")
Cc: stable@vger.kernel.org
Reported-by: Curtis Malainey <cujomalainey@chromium.org>
Closes: https://github.com/thesofproject/linux/pull/5214
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
Link: https://patch.msgid.link/20250205135232.19762-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>