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Re: [Fwd: Help needed with bufferoverflow in cvs]

From: Crist J. Clark
Subject: Re: [Fwd: Help needed with bufferoverflow in cvs]
Date: Fri, 22 Feb 2002 09:34:00 -0800
User-agent: Mutt/1.2.5i

On Thu, Feb 21, 2002 at 10:21:05AM -0500, Larry Jones wrote:

> > This is 1.10.7-7; do you have the patch for this problem handy?
> The best fix is to upgrade to a reasonably current release of CVS, which
> you can get from www.cvshome.org.  The current release is 1.11.1p1.  If
> you insist on patching an obsolete version:

Well, if that was his problem, there still appears to be one.

  $ cvs -v

  Concurrent Versions System (CVS) 1.11.1p1-FreeBSD (client/server)

  Copyright (c) 1989-2001 Brian Berliner, david d `zoo' zuhn, 
                          Jeff Polk, and other authors

  CVS may be copied only under the terms of the GNU General Public License,
  a copy of which can be found with the CVS distribution kit.

  Specify the --help option for further information about CVS

Which looks like the current release. This is a FreeBSD 4.5-RELEASE
system, BTW. And I get,

  $ cvs -f diff -C111111111111 ip_fw.c
  Index: ip_fw.c
  RCS file: /export/ncvs/src/sys/netinet/ip_fw.c,v
  retrieving revision
  diff -C111111111111 -r1.131.2.31 ip_fw.c
  Segmentation fault (core dumped)

The fault is not at the code you quoted, but I'm seg faulting,

  (gdb) run -fq diff -C`perl -e 'print "1" x 11'` 
  Starting program: /var/tmp/export/stable/src/gnu/usr.bin/cvs/cvs/cvs -fq diff 
-C`perl -e 'print "1" x 11'` /export/current/src/sys/netinet/ip_fw.c
  Index: /export/current/src/sys/netinet/ip_fw.c
  RCS file: /export/ncvs/src/sys/netinet/ip_fw.c,v
  retrieving revision 1.181
  diff -C11111111111 -r1.181 ip_fw.c

  Program received signal SIGSEGV, Segmentation fault.
  0x8099b7e in discard_confusing_lines (filevec=0xbfbff38c)

Sorry, I have not looked in to it more closely than this.
Crist J. Clark                     |     cjclark@alum.mit.edu
                                   |     cjclark@jhu.edu
http://people.freebsd.org/~cjc/    |     cjc@freebsd.org

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