analog: avoid double free in '-O analog' shutdown path

[libsigrok.git] / src / output / analog.c

diff --git a/src/output/analog.c b/src/output/analog.c
index 5c624e050033729273b0972fb4c6c580cecd80c8..d665b8ec2edaa81182adc50387b0538d6dc70dfe 100644 (file)
--- a/src/output/analog.c
+++ b/src/output/analog.c
@@ -195,8 +195,14 @@ static int cleanup(struct sr_output *o)
        ctx = o->priv;
 
        g_ptr_array_free(ctx->channellist, 1);
-       g_variant_unref(options[0].def);
-       g_slist_free_full(options[0].values, (GDestroyNotify)g_variant_unref);
+       if (options[0].def) {
+               g_variant_unref(options[0].def);
+               options[0].def = NULL;
+       }
+       if (options[0].values) {
+               g_slist_free_full(options[0].values, (GDestroyNotify)g_variant_unref);
+               options[0].values = NULL;
+       }
        g_free(ctx->fdata);
        g_free(ctx);
        o->priv = NULL;