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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 18 Dec 2008 11:58:12 +0000 (UTC)
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Subject: svn commit: r186276 - head/sys/kern
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Author: kib
Date: Thu Dec 18 11:58:12 2008
New Revision: 186276
URL: http://svn.freebsd.org/changeset/base/186276

Log:
  Do not return success and doomed vnode from lookup. LK_UPGRADE allows
  the vnode to be reclaimed.
  
  Tested by:	pho
  MFC after:	1 month

Modified:
  head/sys/kern/vfs_lookup.c

Modified: head/sys/kern/vfs_lookup.c
==============================================================================
--- head/sys/kern/vfs_lookup.c	Thu Dec 18 09:59:24 2008	(r186275)
+++ head/sys/kern/vfs_lookup.c	Thu Dec 18 11:58:12 2008	(r186276)
@@ -814,6 +814,10 @@ success:
 	if ((cnp->cn_flags & (ISLASTCN | LOCKSHARED | LOCKLEAF)) ==
 	    (ISLASTCN | LOCKLEAF) && VOP_ISLOCKED(dp) != LK_EXCLUSIVE) {
 		vn_lock(dp, LK_UPGRADE | LK_RETRY);
+		if (dp->v_iflag & VI_DOOMED) {
+			error = ENOENT;
+			goto bad2;
+		}
 	}
 	if (vfslocked && dvfslocked)
 		VFS_UNLOCK_GIANT(dvfslocked);	/* Only need one */