From 8cd73ce7ba6381feb9df763240dee3a6d4aff1ca Mon Sep 17 00:00:00 2001 From: Keyon Jie Date: Fri, 1 Nov 2019 12:09:14 -0500 Subject: [PATCH] ASoC: SOF: topology: fix missing NULL pointer check Add check to avoid possible NULL pointer dereference issue. This issue was reported by static analysis tools, we didn't face this issue but we can't rule it out either as a false positive. Reported-by: Keqiao Zhang Signed-off-by: Keyon Jie Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20191101170916.26517-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/topology.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index 143b8259a70a4..6096731e89ce1 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -150,6 +150,11 @@ static int sof_keyword_dapm_event(struct snd_soc_dapm_widget *w, /* get runtime PCM params using widget's stream name */ spcm = snd_sof_find_spcm_name(sdev, swidget->widget->sname); + if (!spcm) { + dev_err(sdev->dev, "error: cannot find PCM for %s\n", + swidget->widget->name); + return -EINVAL; + } /* process events */ switch (event) { -- 2.30.2