From b676da70c495acb2515de76300596e9147806ead Mon Sep 17 00:00:00 2001
From: Rakesh Ughreja <rakesh.a.ughreja@intel.com>
Date: Tue, 24 Oct 2017 18:26:47 +0530
Subject: [PATCH] ALSA: hda: Abort capability probe on invalid capability
Git-commit: b676da70c495acb2515de76300596e9147806ead
Patch-mainline: v4.15-rc1
References: bsc#1051510
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>
---
sound/hda/hdac_controller.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -319,7 +319,8 @@ int snd_hdac_bus_parse_capabilities(stru
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;
}