From: Jeeja KP Date: Fri, 13 Nov 2015 13:52:11 +0000 (+0530) Subject: ASoC: Intel: Skylake: Fix null ptr dereferenced in skl_tplg_bind_sinks X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0ed95d769c8d6c1030dd9f94cf6fb2a6ed98a4ce;p=linux-beck.git ASoC: Intel: Skylake: Fix null ptr dereferenced in skl_tplg_bind_sinks This patch fixes the below warning form smatch and makes the skl_tplg_bind_sinks take the next sink as argument which is true when the current sink is valid sound/soc/intel/skylake/skl-topology.c:453 skl_tplg_bind_sinks() error: we previously assumed 'sink' could be null (see line 452) sound/soc/intel/skylake/skl-topology.c 451 452 if (!sink) ^^^^ New check. Reversed? 453 return skl_tplg_bind_sinks(sink, skl, src_mconfig); ^^^^ This is dereferenced inside the function. 454 455 return 0; Reported-by: Dan Carpenter Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul Signed-off-by: Mark Brown --- diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c index 2b6ee22b5ea2..0937ea2129c1 100644 --- a/sound/soc/intel/skylake/skl-topology.c +++ b/sound/soc/intel/skylake/skl-topology.c @@ -408,7 +408,7 @@ static int skl_tplg_bind_sinks(struct snd_soc_dapm_widget *w, struct skl_module_cfg *src_mconfig) { struct snd_soc_dapm_path *p; - struct snd_soc_dapm_widget *sink = NULL; + struct snd_soc_dapm_widget *sink = NULL, *next_sink = NULL; struct skl_module_cfg *sink_mconfig; struct skl_sst *ctx = skl->skl_sst; int ret; @@ -420,7 +420,7 @@ static int skl_tplg_bind_sinks(struct snd_soc_dapm_widget *w, dev_dbg(ctx->dev, "%s: src widget=%s\n", __func__, w->name); dev_dbg(ctx->dev, "%s: sink widget=%s\n", __func__, p->sink->name); - sink = p->sink; + next_sink = p->sink; /* * here we will check widgets in sink pipelines, so that * can be any widgets type and we are only interested if @@ -450,7 +450,7 @@ static int skl_tplg_bind_sinks(struct snd_soc_dapm_widget *w, } if (!sink) - return skl_tplg_bind_sinks(sink, skl, src_mconfig); + return skl_tplg_bind_sinks(next_sink, skl, src_mconfig); return 0; }