From 8d5f9131fccc3bb06e4c59f2f28cf8b5d218cd17 Mon Sep 17 00:00:00 2001
From: Don Lewis <truckman@FreeBSD.org>
Date: Thu, 19 Jun 2003 03:55:01 +0000
Subject: [PATCH] VOP_GETVOBJECT() wants to be called with the vnode lock held.

---
 sys/kern/uipc_syscalls.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
index 98be6d3006f..d6b694743f1 100644
--- a/sys/kern/uipc_syscalls.c
+++ b/sys/kern/uipc_syscalls.c
@@ -1775,10 +1775,13 @@ do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
 	 */
 	if ((error = fgetvp_read(td, uap->fd, &vp)) != 0)
 		goto done;
+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
 	if (vp->v_type != VREG || VOP_GETVOBJECT(vp, &obj) != 0) {
 		error = EINVAL;
+		VOP_UNLOCK(vp, 0, td);
 		goto done;
 	}
+	VOP_UNLOCK(vp, 0, td);
 	if ((error = fgetsock(td, uap->s, &so, NULL)) != 0)
 		goto done;
 	if (so->so_type != SOCK_STREAM) {