xnu-792.6.76.tar.gz

[apple/xnu.git] / bsd / kern / uipc_usrreq.c

diff --git a/bsd/kern/uipc_usrreq.c b/bsd/kern/uipc_usrreq.c
index a9a2de3c00a05160526acb5aec66502ae7f0dd60..5ae9a884a1644e91cb577ea6927d64d020d58910 100644 (file)
--- a/bsd/kern/uipc_usrreq.c
+++ b/bsd/kern/uipc_usrreq.c
@@ -307,8 +307,13 @@ uipc_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
                goto release;
        }
 
-       if (control && (error = unp_internalize(control, p)))
-               goto release;
+       if (control) {
+               socket_unlock(so, 0); /* release global lock to avoid deadlock (4436174) */ 
+               error = unp_internalize(control, p);
+               socket_lock(so, 0);
+               if (error)
+                       goto release;
+       }
 
        switch (so->so_type) {
        case SOCK_DGRAM: