Realtek headset codec drivers typically check if the card is
instantiated before proceeding with the jack detection.
The rt700, rt711 and rt711-sdca are however missing a check on the
card pointer, which can lead to NULL dereferences encountered in
driver bind/unbind tests.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
sound/soc/codecs/rt700.c | 2 +-
sound/soc/codecs/rt711-sdca.c | 2 +-
sound/soc/codecs/rt711.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/rt700.c b/sound/soc/codecs/rt700.c
index af32295fa9b93..4a99d5f4706fd 100644
--- a/sound/soc/codecs/rt700.c
+++ b/sound/soc/codecs/rt700.c
@@ -162,7 +162,7 @@ static void rt700_jack_detect_handler(struct work_struct *work)
if (!rt700->hs_jack)
return;
- if (!rt700->component->card->instantiated)
+ if (!rt700->component->card || !rt700->component->card->instantiated)
return;
reg = RT700_VERB_GET_PIN_SENSE | RT700_HP_OUT;
diff --git a/sound/soc/codecs/rt711-sdca.c b/sound/soc/codecs/rt711-sdca.c
index af73bcb4560a3..93b36f05cb567 100644
--- a/sound/soc/codecs/rt711-sdca.c
+++ b/sound/soc/codecs/rt711-sdca.c
@@ -294,7 +294,7 @@ static void rt711_sdca_jack_detect_handler(struct work_struct *work)
if (!rt711->hs_jack)
return;
- if (!rt711->component->card->instantiated)
+ if (!rt711->component->card || !rt711->component->card->instantiated)
return;
/* SDW_SCP_SDCA_INT_SDCA_0 is used for jack detection */
diff --git a/sound/soc/codecs/rt711.c b/sound/soc/codecs/rt711.c
index 1e35ba433a7e7..2f445b27305a4 100644
--- a/sound/soc/codecs/rt711.c
+++ b/sound/soc/codecs/rt711.c
@@ -242,7 +242,7 @@ static void rt711_jack_detect_handler(struct work_struct *work)
if (!rt711->hs_jack)
return;
- if (!rt711->component->card->instantiated)
+ if (!rt711->component->card || !rt711->component->card->instantiated)
return;
if (pm_runtime_status_suspended(rt711->slave->dev.parent)) {
--
2.34.1
