There is no check for the kcontrol against NULL and in some cases
it causes kernel to crash.
Fixes: 2d744ecf2b984 ("ASoC: Intel: Skylake: Automatic DMIC format configuration according to information from NHLT")
Cc: <stable@xxxxxxxxxxxxxxx> # 5.4+
Signed-off-by: Lukasz Majczak <lma@xxxxxxxxxxxx>
---
sound/soc/intel/skylake/skl-topology.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c
index ae466cd592922..c9abbe4ff0ba3 100644
--- a/sound/soc/intel/skylake/skl-topology.c
+++ b/sound/soc/intel/skylake/skl-topology.c
@@ -3618,12 +3618,18 @@ static void skl_tplg_complete(struct snd_soc_component *component)
int i;
list_for_each_entry(dobj, &component->dobj_list, list) {
- struct snd_kcontrol *kcontrol = dobj->control.kcontrol;
- struct soc_enum *se =
- (struct soc_enum *)kcontrol->private_value;
- char **texts = dobj->control.dtexts;
+ struct snd_kcontrol *kcontrol;
+ struct soc_enum *se;
+ char **texts;
char chan_text[4];
+ kcontrol = dobj->control.kcontrol;
+ if(!kcontrol)
+ continue;
+
+ se = (struct soc_enum *)kcontrol->private_value;
+ texts = dobj->control.dtexts;
+
if (dobj->type != SND_SOC_DOBJ_ENUM ||
dobj->control.kcontrol->put !=
skl_tplg_multi_config_set_dmic)
base-commit: 69fe63aa100220c8fd1f451dd54dd0895df1441d
Thanks for pointing out and fixing this. This check was obviously
missing there. I did a quick verification on few of our platforms,
encountered no issues, so:
Reviewed-by: Mateusz Gorski <mateusz.gorski@xxxxxxxxxxxxxxx>
Also, could you please:
- describe the affected configuration (used machine driver or audio card
name, device name),
- share full dmesg logs from one of said crashes,
- copy the output of "amixer -c0 controls" command executed on affected
device.
These would be useful information for us to further improve our
validation and help us with debugging.
Thanks,
Mateusz
