ASoC: Intel: avs: Fix null-ptr-deref in avs_component_probe()

devm_kasprintf() returns NULL when memory allocation fails. Currently,
avs_component_probe() does not check for this case, which results in a
NULL pointer dereference.

Fixes: 739c031 ("ASoC: Intel: avs: Provide support for fallback topology")
Reviewed-by: Cezary Rojewski <[email protected]>
Reviewed-by: Ethan Carter Edwards <[email protected]>
Signed-off-by: Henry Martin <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: Henry Martin

sound/soc/intel/avs/pcm.c

@@ -927,7 +927,8 @@ static int avs_component_probe(struct snd_soc_component *component)
 		else
 			mach->tplg_filename = devm_kasprintf(adev->dev, GFP_KERNEL,
 							     "hda-generic-tplg.bin");
-
+		if (!mach->tplg_filename)
+			return -ENOMEM;
 		filename = kasprintf(GFP_KERNEL, "%s/%s", component->driver->topology_name_prefix,
 				     mach->tplg_filename);
 		if (!filename)