From 86e2d48bf9e2c729b4b9425320af0e8abc0d9b4c Mon Sep 17 00:00:00 2001
From: Fedor Uporov <fsu@FreeBSD.org>
Date: Sun, 17 May 2020 14:03:13 +0000
Subject: [PATCH] Fix incorrect inode link count check in case of rename.

The check was incorrect because the directory inode link count have
min value 2 after dir_nlink extfs feature introduction.
---
 sys/fs/ext2fs/ext2_vnops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/fs/ext2fs/ext2_vnops.c b/sys/fs/ext2fs/ext2_vnops.c
index 0e719a4a542..99d2043f498 100644
--- a/sys/fs/ext2fs/ext2_vnops.c
+++ b/sys/fs/ext2fs/ext2_vnops.c
@@ -1018,10 +1018,11 @@ abortit:
 		 */
 		ext2_dec_nlink(xp);
 		if (doingdirectory) {
-			if (--xp->i_nlink != 0)
+			if (xp->i_nlink > 2)
 				panic("ext2_rename: linked directory");
 			error = ext2_truncate(tvp, (off_t)0, IO_SYNC,
 			    tcnp->cn_cred, tcnp->cn_thread);
+			xp->i_nlink = 0;
 		}
 		xp->i_flag |= IN_CHANGE;
 		vput(tvp);