From: Lu Guanqun <guanqun.lu@intel.com>
Date: Fri, 19 Aug 2011 08:05:25 +0000 (+0800)
Subject: ucm: fix seg fault in execute_cset()
X-Git-Tag: v1.0.25~19
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=29880e8c66cfdc584e01aa549037f76b081b5019;p=alsa-lib.git

ucm: fix seg fault in execute_cset()

When there's no space in 'cset', 'pos' gets NULL, dereferencing 'pos' gets a
seg fault. We need to be more robust.

Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/src/ucm/main.c b/src/ucm/main.c
index 8e9a85d2..9ecbe435 100644
--- a/src/ucm/main.c
+++ b/src/ucm/main.c
@@ -196,7 +196,8 @@ static int execute_cset(snd_ctl_t *ctl, char *cset)
 		goto __fail;
 	err = 0;
       __fail:
-	*pos = ' ';
+	if (pos != NULL)
+		*pos = ' ';
 
 	if (id != NULL)
 		free(id);