[NETFILTER]: nfnetlink_queue: don't unregister handler of other subsystem
The queue handlers registered by ip[6]_queue.ko at initialization should
not be unregistered according to requests from userland program
using nfnetlink_queue. If we allow that, there is no way to register
the handlers of built-in ip[6]_queue again.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 7a97bec..7d47fc4 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -913,9 +913,7 @@
case NFQNL_CFG_CMD_PF_UNBIND:
QDEBUG("unregistering queue handler for pf=%u\n",
ntohs(cmd->pf));
- /* This is a bug and a feature. We can unregister
- * other handlers(!) */
- ret = nf_unregister_queue_handler(ntohs(cmd->pf));
+ ret = nf_unregister_queue_handler(ntohs(cmd->pf), &nfqh);
break;
default:
ret = -EINVAL;