Re: [PATCH] ASoC: dapm: Add a dummy snd_pcm_runtime to avoid NULL pointer access

On Tue, Jul 26, 2016 at 12:28:40PM -0700, Nicolin Chen wrote: > diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c > index 8698c26..eed15ca 100644 > --- a/sound/soc/soc-dapm.c > +++ b/sound/soc/soc-dapm.c > @@ -3493,6 +3493,7 @@ static int snd_soc_dai_link_event(struct > snd_soc_dapm_widget

[PATCH] ASoC: dapm: Add a dummy snd_pcm_runtime to avoid NULL pointer access

The SND_SOC_DAPM_PRE_PMU case would call startup()/hw_params() that might access substream->runtime through other functions. For example: Unable to handle kernel NULL pointer dereference at virtual address [] PC is at snd_pcm_hw_rule_add+0x24/0x1b0 LR is at snd_pcm_hw_constraint_list+0x20/0x2