[alsa-devel] [PATCH] ALSA: ASoC: Fix NULL pointer dereference in __pxa2xx_pcm_hw_free

Check for rtd->params->drcmr != NULL before accessing it.

Signed-off-by: Daniel Mack daniel@caiaq.de Cc: Eric Miao eric.miao@marvell.com Cc: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/arm/pxa2xx-pcm-lib.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c index 108b643..6205f37 100644 --- a/sound/arm/pxa2xx-pcm-lib.c +++ b/sound/arm/pxa2xx-pcm-lib.c @@ -75,7 +75,7 @@ int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) { struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;

- if (rtd && rtd->params) + if (rtd && rtd->params && rtd->params->drcmr) *rtd->params->drcmr = 0;

snd_pcm_set_runtime_buffer(substream, NULL);