ALSA: hda: Abort capability probe on invalid capability

On reading wrong capability pointer values driver may crash, so whenever
driver discovers unknown HDA capability, log it as error and stop traversing
the link list further.

Signed-off-by: Rakesh Ughreja <rakesh.a.ughreja@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 978dc1801b3aceb8e2245b819097954c76595d77..8f7d0d9ed76209d68c955d6abd5e8f6b7a8ca183 100644 (file)
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -314,7 +314,8 @@ int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus)
                        break;
 
                default:
-                       dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap);
+                       dev_err(bus->dev, "Unknown capability %d\n", cur_cap);
+                       cur_cap = 0;
                        break;
                }