system-linux: fix a glob related memleak

[project/netifd.git] / system-linux.c

diff --git a/system-linux.c b/system-linux.c
index 7ae9e27..057bc39 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -443,17 +443,18 @@ static bool system_is_bridge(const char *name, char *buf, int buflen)
 static char *system_get_bridge(const char *name, char *buf, int buflen)
 {
        char *path;
-       ssize_t len;
+       ssize_t len = -1;
        glob_t gl;
 
        snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
        if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
                return NULL;
 
-       if (gl.gl_pathc == 0)
-               return NULL;
+       if (gl.gl_pathc > 0)
+               len = readlink(gl.gl_pathv[0], buf, buflen);
+
+       globfree(&gl);
 
-       len = readlink(gl.gl_pathv[0], buf, buflen);
        if (len < 0)
                return NULL;