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From: John Baldwin <jhb@FreeBSD.org>
Date: Fri, 11 Apr 2014 13:11:43 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r264342 - head/sys/netinet
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Author: jhb
Date: Fri Apr 11 13:11:43 2014
New Revision: 264342
URL: http://svnweb.freebsd.org/changeset/base/264342

Log:
  Don't leak the TCP pcbinfo lock if a time wait connection is closed
  in between grabbing a reference on the connection structure and obtaining
  the pcbinfo lock.
  
  Reviewed by:	Julien Charbon

Modified:
  head/sys/netinet/tcp_timewait.c

Modified: head/sys/netinet/tcp_timewait.c
==============================================================================
--- head/sys/netinet/tcp_timewait.c	Fri Apr 11 11:56:16 2014	(r264341)
+++ head/sys/netinet/tcp_timewait.c	Fri Apr 11 13:11:43 2014	(r264342)
@@ -731,8 +731,10 @@ tcp_tw_2msl_scan(void)
 		/* Close timewait state */
 		if (INP_INFO_TRY_WLOCK(&V_tcbinfo)) {
 			TW_WLOCK(V_tw_lock);
-			if (tw_pcbrele(tw))
+			if (tw_pcbrele(tw)) {
+				INP_INFO_WUNLOCK(&V_tcbinfo);
 				continue;
+			}
 
 			KASSERT(tw->tw_inpcb != NULL,
 			    ("%s: tw->tw_inpcb == NULL", __func__));