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plugin loader: Don't crash on bogus plugin details

Browse source 
When invalid registry chunks are received from the child, and parsing
fails, don't access an invalid plugin pointer. Instead attempt to
figure out which plugin caused the problem and blacklist it.
This commit is contained in:
Jan Schmidt 2009-11-04 01:51:38 +00:00
parent 35e1103446
commit cebbcb1cdf
1 changed files with 28 additions and 13 deletions
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41
gst/gstpluginloader.c
View file

@ -605,7 +605,6 @@ do_plugin_load (GstPluginLoader * l, const gchar * filename, guint tag)
}
#endif
newplugin = gst_plugin_load_file ((gchar *) filename, NULL);
if (newplugin) {
guint hdr_pos;
@ -733,7 +732,8 @@ handle_rx_packet (GstPluginLoader * l,
tag, payload_len);
/* Assume that tagged details come back in the order
* we requested, and delete anything before this one */
* we requested, and delete anything before (but not
* including) this one */
cur = l->pending_plugins;
while (cur) {
PendingPluginEntry *e = (PendingPluginEntry *) (cur->data);
@ -741,24 +741,30 @@ handle_rx_packet (GstPluginLoader * l,
if (e->tag > tag)
break;
cur = g_list_delete_link (cur, cur);
if (e->tag == tag) {
entry = e;
break;
} else {
cur = g_list_delete_link (cur, cur);
g_free (e->filename);
g_free (e);
}
}
l->pending_plugins = cur;
if (cur == NULL)
l->pending_plugins_tail = NULL;
if (payload_len > 0) {
GstPlugin *newplugin;
_priv_gst_registry_chunks_load_plugin (l->registry, &tmp,
tmp + payload_len, &newplugin);
GstPlugin *newplugin = NULL;
if (!_priv_gst_registry_chunks_load_plugin (l->registry, &tmp,
tmp + payload_len, &newplugin)) {
/* Got garbage from the child, so fail and trigger replay of plugins */
GST_ERROR_OBJECT (l->registry,
"Problems loading plugin details with tag %u from scanner", tag);
return FALSE;
}
newplugin->flags &= ~GST_PLUGIN_FLAG_CACHED;
GST_LOG_OBJECT (l->registry,
"marking plugin %p as registered as %s", newplugin,
@ -778,6 +784,14 @@ handle_rx_packet (GstPluginLoader * l,
g_free (entry);
}
/* Remove the plugin entry we just loaded */
cur = l->pending_plugins;
if (cur != NULL)
cur = g_list_delete_link (cur, cur);
l->pending_plugins = cur;
if (cur == NULL)
l->pending_plugins_tail = NULL;
break;
}
case PACKET_SYNC:
@ -895,13 +909,12 @@ exchange_packets (GstPluginLoader * l)
if (gst_poll_fd_has_error (l->fdset, &l->fd_r) ||
gst_poll_fd_has_closed (l->fdset, &l->fd_r)) {
GST_LOG ("read fd %d closed/errored", l->fd_r.fd);
plugin_loader_cleanup_child (l);
return FALSE;
goto fail_and_cleanup;
}
if (gst_poll_fd_can_read (l->fdset, &l->fd_r)) {
if (!read_one (l))
return FALSE;
goto fail_and_cleanup;
}
}
@ -909,15 +922,17 @@ exchange_packets (GstPluginLoader * l)
if (gst_poll_fd_has_error (l->fdset, &l->fd_w) ||
gst_poll_fd_has_closed (l->fdset, &l->fd_r)) {
GST_ERROR ("write fd %d closed/errored", l->fd_w.fd);
plugin_loader_cleanup_child (l);
return FALSE;
goto fail_and_cleanup;
}
if (gst_poll_fd_can_write (l->fdset, &l->fd_w)) {
if (!write_one (l))
return FALSE;
goto fail_and_cleanup;
}
}
} while (l->tx_buf_read < l->tx_buf_write);
return TRUE;
fail_and_cleanup:
plugin_loader_cleanup_child (l);
return FALSE;
}