ASoC: SOF: amd: Fix NULL pointer crash in acp_sof_ipc_msg_data function

Check substream and runtime variables before assigning.

Signed-off-by: V sujith kumar Reddy <Vsujithkumar.Reddy@amd.com
Link: https://lore.kernel.org/r/20230508070510.6100-1-Vsujithkumar.Reddy@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org

diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c
index 4e0c48a..749e856 100644 (file)
--- a/sound/soc/sof/amd/acp-ipc.c
+++ b/sound/soc/sof/amd/acp-ipc.c
@@ -209,7 +209,12 @@ int acp_sof_ipc_msg_data(struct snd_sof_dev *sdev, struct snd_sof_pcm_stream *sp
                acp_mailbox_read(sdev, offset, p, sz);
        } else {
                struct snd_pcm_substream *substream = sps->substream;
-               struct acp_dsp_stream *stream = substream->runtime->private_data;
+               struct acp_dsp_stream *stream;
+
+               if (!substream || !substream->runtime)
+                       return -ESTRPIPE;
+
+               stream = substream->runtime->private_data;
 
                if (!stream)
                        return -ESTRPIPE;