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From: Mark Johnston <markj@FreeBSD.org>
Date: Fri, 1 Dec 2017 22:51:02 +0000 (UTC)
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Subject: svn commit: r326438 - head/sys/kern
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Author: markj
Date: Fri Dec  1 22:51:02 2017
New Revision: 326438
URL: https://svnweb.freebsd.org/changeset/base/326438

Log:
  Plug a name cache lock leak.
  
  Reviewed by:	mjg
  MFC after:	1 week
  Sponsored by:	Dell EMC Isilon

Modified:
  head/sys/kern/vfs_cache.c

Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c	Fri Dec  1 22:48:20 2017	(r326437)
+++ head/sys/kern/vfs_cache.c	Fri Dec  1 22:51:02 2017	(r326438)
@@ -1162,6 +1162,8 @@ retry_dotdot:
 			SDT_PROBE3(vfs, namecache, lookup, miss, dvp,
 			    "..", NULL);
 			mtx_unlock(dvlp);
+			if (dvlp2 != NULL)
+				mtx_unlock(dvlp2);
 			return (0);
 		}
 		if ((ncp->nc_flag & NCF_ISDOTDOT) != 0) {