From 051d71e073614a72ad423d6dacba37a7eeff274d Mon Sep 17 00:00:00 2001
From: V sujith kumar Reddy <Vsujithkumar.Reddy@amd.com>
Date: Mon, 8 May 2023 12:35:08 +0530
Subject: [PATCH] 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
---
 sound/soc/sof/amd/acp-ipc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c
index 4e0c48a36159..749e856dc601 100644
--- 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;