Lock down rawcb_list, a global list of control blocks for raw sockets,

using rawcb_mtx.  Hold this mutex while modifying or iterating over
the control list; this means that the mutex is held over calls into
socket delivery code, which no longer causes a lock order reversal as
the routing socket code uses a netisr to avoid recursing socket ->
routing -> socket.

Note: Locking of IPsec consumers of rawcb_list is not included in this
commit.

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/net/raw_cb.h b/sys/net/raw_cb.h
index 22b100b..177dedf 100644
--- a/sys/net/raw_cb.h
+++ b/sys/net/raw_cb.h
@@ -57,6 +57,7 @@ struct rawcb {
 
 #ifdef _KERNEL
 extern LIST_HEAD(rawcb_list_head, rawcb) rawcb_list;
+extern struct mtx rawcb_mtx;
 
 /* protosw entries */
 pr_ctlinput_t	raw_ctlinput;