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authorPeter Ujfalusi <peter.ujfalusi@linux.intel.com>2023-01-20 11:21:25 +0100
committerMark Brown <broonie@kernel.org>2023-01-20 15:09:56 +0100
commitfb4293600cc651cfe4d48ec489f1d175adf6e2f8 (patch)
tree395f10514f3571b9285ce56e2439db105c20849f /sound
parentASoC: Intel: set dpcm_capture for amps (diff)
downloadlinux-fb4293600cc651cfe4d48ec489f1d175adf6e2f8.tar.xz
linux-fb4293600cc651cfe4d48ec489f1d175adf6e2f8.zip
ASoC: SOF: sof-audio: prepare_widgets: Check swidget for NULL on sink failure
If the swidget is NULL we skip the preparing of the widget and jump to handle the sink path of the widget. If the prepare fails in this case we would undo the prepare but the swidget is NULL (we skipped the prepare for the widget). To avoid NULL pointer dereference in this case we must check swidget against NULL pointer once again. Fixes: 0ad84b11f2f8 ("ASoC: SOF: sof-audio: skip prepare/unprepare if swidget is NULL") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20230120102125.30653-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sof/sof-audio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index 275b1ae45306..865c367eb2f2 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -327,7 +327,8 @@ sink_prepare:
p->walking = false;
if (ret < 0) {
/* unprepare the source widget */
- if (widget_ops[widget->id].ipc_unprepare && swidget->prepared) {
+ if (widget_ops[widget->id].ipc_unprepare &&
+ swidget && swidget->prepared) {
widget_ops[widget->id].ipc_unprepare(swidget);
swidget->prepared = false;
}