From f274e25659a91a7c0c63d9013f251acd8dc2630d Mon Sep 17 00:00:00 2001
From: Gleb Smirnoff <glebius@FreeBSD.org>
Date: Fri, 14 Nov 2014 06:02:29 +0000
Subject: [PATCH] There should not be zero length mbufs in socket buffers.  The
 code comes from r1451, and thus can't be explained.  A patch with explicit
 panic() here survived all tests.

Tested by:	pho
Sponsored by:	Nginx, Inc.
---
 sys/kern/uipc_sockbuf.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/sys/kern/uipc_sockbuf.c b/sys/kern/uipc_sockbuf.c
index c74343b8f812..9bd5f789d4cc 100644
--- a/sys/kern/uipc_sockbuf.c
+++ b/sys/kern/uipc_sockbuf.c
@@ -905,13 +905,6 @@ sbcut_internal(struct sockbuf *sb, int len)
 		mfree = m;
 		m = n;
 	}
-	while (m && m->m_len == 0) {
-		sbfree(sb, m);
-		n = m->m_next;
-		m->m_next = mfree;
-		mfree = m;
-		m = n;
-	}
 	if (m) {
 		sb->sb_mb = m;
 		m->m_nextpkt = next;