[PATCH 08/11] ASoC: fsl_asrc_m2m: Fix bogus compress task pointer assignments

[Takashi Iwai <tiwai@suse.de>]

When a creation of input or output compress-offload task fails in
fsl-asrc driver, the task->input or task->output pointer is left with
ERR_PTR(), which is non-NULL.  Then it's handled in the compress
offload core and it tries to release via dma_buf_put(), resulting in
an access to a wrong address.

Clear the bogus pointers properly before returning an error.

Fixes: 24a01710f627 ("ASoC: fsl_asrc_m2m: Add memory to memory function")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/soc/fsl/fsl_asrc_m2m.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_asrc_m2m.c b/sound/soc/fsl/fsl_asrc_m2m.c
index 4bc40f328f58..42b0e21f281c 100644
--- a/sound/soc/fsl/fsl_asrc_m2m.c
+++ b/sound/soc/fsl/fsl_asrc_m2m.c
@@ -475,6 +475,7 @@ static int fsl_asrc_m2m_comp_task_create(struct snd_compr_stream *stream,
 	task->input = dma_buf_export(&exp_info_in);
 	if (IS_ERR(task->input)) {
 		ret = PTR_ERR(task->input);
+		task->input = NULL;
 		return ret;
 	}
 
@@ -485,6 +486,7 @@ static int fsl_asrc_m2m_comp_task_create(struct snd_compr_stream *stream,
 	task->output = dma_buf_export(&exp_info_out);
 	if (IS_ERR(task->output)) {
 		ret = PTR_ERR(task->output);
+		task->output = NULL;
 		return ret;
 	}
 
-- 
2.55.0