From: Cezary Rojewski cezary.rojewski@intel.com
rx_data and rx_bytes present for tx_wait_done are optional parameters. If not provided, function should not attempt to copy received data. This change fixes memcpy NULL pointer dereference issue occurring when optional rx_data is NULL while received message size is non-zero.
Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com --- sound/soc/intel/common/sst-ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/intel/common/sst-ipc.c b/sound/soc/intel/common/sst-ipc.c index dcff13802c00..fc3340f1da3a 100644 --- a/sound/soc/intel/common/sst-ipc.c +++ b/sound/soc/intel/common/sst-ipc.c @@ -71,7 +71,7 @@ static int tx_wait_done(struct sst_generic_ipc *ipc, } else {
/* copy the data returned from DSP */ - if (msg->rx_size) + if (rx_data) memcpy(rx_data, msg->rx_data, msg->rx_size); ret = msg->errno; }