alsasrc: set alsasrc->handle back to NULL when closing device

Fixes crashes in gst_alsa_find_device_name() when probing or
reading the device-name property (e.g. when doing a dot-file
dump). Fixes #589797.

diff --git a/ext/alsa/gstalsasrc.c b/ext/alsa/gstalsasrc.c
index 00cfdbc..07ac78f 100644 (file)
--- a/ext/alsa/gstalsasrc.c
+++ b/ext/alsa/gstalsasrc.c
@@ -741,6 +741,7 @@ gst_alsasrc_close (GstAudioSrc * asrc)
   GstAlsaSrc *alsa = GST_ALSA_SRC (asrc);
 
   snd_pcm_close (alsa->handle);
+  alsa->handle = NULL;
 
   if (alsa->mixer) {
     gst_alsa_mixer_free (alsa->mixer);