From owner-cvs-src@FreeBSD.ORG  Fri Jul 20 09:41:54 2007
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id CD5D416A41B;
	Fri, 20 Jul 2007 09:41:54 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id A6FAD13C46B;
	Fri, 20 Jul 2007 09:41:54 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id l6K9fsUV048475;
	Fri, 20 Jul 2007 09:41:54 GMT (envelope-from kib@repoman.freebsd.org)
Received: (from kib@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id l6K9fsE7048474;
	Fri, 20 Jul 2007 09:41:54 GMT (envelope-from kib)
Message-Id: <200707200941.l6K9fsE7048474@repoman.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 20 Jul 2007 09:41:54 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/kern tty.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 Jul 2007 09:41:54 -0000

kib         2007-07-20 09:41:54 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             tty.c 
  Log:
  ttyfree() frees the cdev().  But if there are pending kevents,
  filt_ttyrdetach() etc would later attempt to dereference cdev->si_tty,
  causing a 0xdeadc0de dereference.  Change kn_hook value from cdev to
  struct tty to avoid dereferencing freed cdev.
  
  In ttygone(), wake up select(), sigio and kevent() users in addition
  to the queue sleepers.
  
  Return EV_EOF from kevent filters if TS_GONE is set.
  
  Submitted by:   peter
  Tested by:      Peter Holm
  Approved by:    re (kensmith)
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.273     +17 -7     src/sys/kern/tty.c