From 0823d2996cd1baad4cb69347e0b3af63ec52dbc0 Mon Sep 17 00:00:00 2001
From: Alexander Kabaev <kan@FreeBSD.org>
Date: Thu, 30 Oct 2003 16:22:51 +0000
Subject: [PATCH] Relock mntvnode_mtx if vget fails in vfs_stdsync. The loop is
 always shoould entered with mutex locked.

---
 sys/kern/vfs_default.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/kern/vfs_default.c b/sys/kern/vfs_default.c
index 41c40403fcb2..e89654fa849d 100644
--- a/sys/kern/vfs_default.c
+++ b/sys/kern/vfs_default.c
@@ -899,6 +899,7 @@ vfs_stdsync(mp, waitfor, cred, td)
 		mtx_unlock(&mntvnode_mtx);
 
 		if ((error = vget(vp, lockreq, td)) != 0) {
+			mtx_lock(&mntvnode_mtx);
 			if (error == ENOENT)
 				goto loop;
 			continue;