From owner-svn-src-head@freebsd.org  Fri Sep 13 22:36:05 2019
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3F71DD5720;
 Fri, 13 Sep 2019 22:36:05 +0000 (UTC)
 (envelope-from glebius@FreeBSD.org)
Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org
 [IPv6:2610:1c1:1:606c::19:3])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 server-signature RSA-PSS (4096 bits)
 client-signature RSA-PSS (4096 bits) client-digest SHA256)
 (Client CN "mxrelay.nyi.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 46VVps0zt8z4Clm;
 Fri, 13 Sep 2019 22:36:05 +0000 (UTC)
 (envelope-from glebius@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 04CD5E472;
 Fri, 13 Sep 2019 22:36:05 +0000 (UTC)
 (envelope-from glebius@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x8DMa4Xh008664;
 Fri, 13 Sep 2019 22:36:04 GMT (envelope-from glebius@FreeBSD.org)
Received: (from glebius@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id x8DMa41h008663;
 Fri, 13 Sep 2019 22:36:04 GMT (envelope-from glebius@FreeBSD.org)
Message-Id: <201909132236.x8DMa41h008663@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: glebius set sender to
 glebius@FreeBSD.org using -f
From: Gleb Smirnoff <glebius@FreeBSD.org>
Date: Fri, 13 Sep 2019 22:36:04 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r352311 - head/sys/netpfil/ipfw
X-SVN-Group: head
X-SVN-Commit-Author: glebius
X-SVN-Commit-Paths: head/sys/netpfil/ipfw
X-SVN-Commit-Revision: 352311
X-SVN-Commit-Repository: base
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Sep 2019 22:36:05 -0000

Author: glebius
Date: Fri Sep 13 22:36:04 2019
New Revision: 352311
URL: https://svnweb.freebsd.org/changeset/base/352311

Log:
  Drivers may pass runt packets to filter. This is okay.
  
  Reviewed by:	gallatin

Modified:
  head/sys/netpfil/ipfw/ip_fw2.c

Modified: head/sys/netpfil/ipfw/ip_fw2.c
==============================================================================
--- head/sys/netpfil/ipfw/ip_fw2.c	Fri Sep 13 21:28:08 2019	(r352310)
+++ head/sys/netpfil/ipfw/ip_fw2.c	Fri Sep 13 22:36:04 2019	(r352311)
@@ -1448,7 +1448,10 @@ ipfw_chk(struct ip_fw_args *args)
 do {								\
 	int x = (_len) + T + EHLEN;				\
 	if (mem) {						\
-		MPASS(pktlen >= x);				\
+		if (__predict_false(pktlen < x)) {		\
+			unlock;					\
+			goto pullup_failed;			\
+		}						\
 		p = (char *)args->mem + (_len) + EHLEN;		\
 	} else {						\
 		if (__predict_false((m)->m_len < x)) {		\