gresolv: Make sure we will not receive DNS data after closing

We must close the channel when freeing the resolver object,
otherwise we might still receive data when the resolver has been
freed already.

Fixes BMC#25757

diff --git a/gweb/gresolv.c b/gweb/gresolv.c
index da09b2b..cf7f2e9 100644 (file)
--- a/gweb/gresolv.c
+++ b/gweb/gresolv.c
@@ -554,8 +554,10 @@ static void free_nameserver(struct resolv_nameserver *nameserver)
        if (nameserver->udp_watch > 0)
                g_source_remove(nameserver->udp_watch);
 
-       if (nameserver->udp_channel != NULL)
+       if (nameserver->udp_channel != NULL) {
+               g_io_channel_shutdown(nameserver->udp_channel, TRUE, NULL);
                g_io_channel_unref(nameserver->udp_channel);
+       }
 
        g_free(nameserver->address);
        g_free(nameserver);