From: Krzysztof Hałasa <khalasa@piap.pl>
Date: Fri, 14 Jun 2013 11:59:38 +0000 (+0200)
Subject: pcm_direct: fix SEGFAULT when getgrnam_r() returns 0 and pgrp is NULL
X-Git-Tag: v1.0.27.2~1
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=9d6736c9a2232ed105ebe38b3a2e21a98f5dd5ba;p=alsa-lib.git

pcm_direct: fix SEGFAULT when getgrnam_r() returns 0 and pgrp is NULL

Signed-off-by: Krzysztof Halasa <khalasa@piap.pl>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/src/pcm/pcm_direct.c b/src/pcm/pcm_direct.c
index 101d3c8a..899c2504 100644
--- a/src/pcm/pcm_direct.c
+++ b/src/pcm/pcm_direct.c
@@ -1650,7 +1650,7 @@ int snd_pcm_direct_parse_open_conf(snd_config_t *root, snd_config_t *conf,
 				if (buffer == NULL)
 					return -ENOMEM;
 				int st = getgrnam_r(group, &grp, buffer, len, &pgrp);
-				if (st != 0) {
+				if (st != 0 || !pgrp) {
 					SNDERR("The field ipc_gid must be a valid group (create group %s)", group);
 					free(buffer);
 					return -EINVAL;