From owner-svn-src-all@FreeBSD.ORG  Mon May 11 19:58:03 2009
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D353410656E7;
	Mon, 11 May 2009 19:58:03 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id BE3238FC19;
	Mon, 11 May 2009 19:58:03 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n4BJw375000745;
	Mon, 11 May 2009 19:58:03 GMT (envelope-from kib@svn.freebsd.org)
Received: (from kib@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n4BJw34q000744;
	Mon, 11 May 2009 19:58:03 GMT (envelope-from kib@svn.freebsd.org)
Message-Id: <200905111958.n4BJw34q000744@svn.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 11 May 2009 19:58:03 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r192001 - head/sys/kern
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 11 May 2009 19:58:07 -0000

Author: kib
Date: Mon May 11 19:58:03 2009
New Revision: 192001
URL: http://svn.freebsd.org/changeset/base/192001

Log:
  Prevent overflow of uio_resid.
  
  Noted by:	jhb
  MFC after:	3 days

Modified:
  head/sys/kern/vfs_syscalls.c

Modified: head/sys/kern/vfs_syscalls.c
==============================================================================
--- head/sys/kern/vfs_syscalls.c	Mon May 11 19:37:05 2009	(r192000)
+++ head/sys/kern/vfs_syscalls.c	Mon May 11 19:58:03 2009	(r192001)
@@ -2596,6 +2596,9 @@ kern_readlinkat(struct thread *td, int f
 	struct nameidata nd;
 	int vfslocked;
 
+	if (count > INT_MAX)
+		return (EINVAL);
+
 	NDINIT_AT(&nd, LOOKUP, NOFOLLOW | LOCKSHARED | LOCKLEAF | MPSAFE |
 	    AUDITVNODE1, pathseg, path, fd, td);