X-Recipient: archive-cygwin AT delorie DOT com X-Spam-Check-By: sourceware.org Date: Wed, 1 Aug 2012 09:02:46 +0200 From: Corinna Vinschen To: cygwin AT cygwin DOT com Subject: Re: sshd crashing Message-ID: <20120801070246.GA12326@calimero.vinschen.de> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <34233493 DOT post AT talk DOT nabble DOT com> <20120731122824 DOT GA30188 AT calimero DOT vinschen DOT de> <20120731201910 DOT GJ9134 AT calimero DOT vinschen DOT de> <34238382 DOT post AT talk DOT nabble DOT com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <34238382.post@talk.nabble.com> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On Jul 31 15:59, A Lichner wrote: > > Thanks Corinna. The fix works. > Ales > > > Corinna Vinschen-2 wrote: > > > > On Jul 31 14:28, Corinna Vinschen wrote: > >> On Jul 30 17:49, Aleš wrote: > >> > > >> > Hello, > >> > > >> > I can confirm the issue. It's occurring after upgrade to 1.7.16 and > >> seems to > >> > be limited to VMWare guests in my case. Any write attempt within the > >> /etc > >> > directory causes sshd to crash. Other directories are fine. > >> > > >> > uname -a before upgrade (sshd doens't crash): > >> > CYGWIN_NT-6.0-WOW64 dbs6 1.7.15(0.260/5/3) 2012-05-09 10:25 i686 Cygwin > >> > and after upgrade (sshd crashes): > >> > CyGWIN_NT-6.0-WOW64 dbs6 1.7.16(0.262/5/3) 2012-07-20 22:55 i686 Cygwin > >> > > >> > > >> > cygrunsrv -S sshd > >> > ssh localhost > >> > $ touch /etc/x > >> > Connection to localhost closed by remote host. > >> > Connection to localhost closed. > >> > > >> > > >> > A familiar message appears in the event log: > >> > service sshd failed: signal 11 raised > >> > > >> > The /etc/x file gets created in the example above. If running vim > >> /etc/x > >> > instead, the .x.swp file gets also created and a vim-nox.exe process > >> keeps > >> > on living, taking all CPU resources till it's killed. > >> > > >> > I have reproduced this on over ten machines running MS Server 2003 and > >> 2008, > >> > all VMware guests. > >> > >> I can reproduce this as well. I also found the patch which introduced > >> the problem, but it's not clear yet, why. Stay tuned. > > > > I've just applied a patch to fix this problem. It seems this is a long > > standing bug which could result in random stack corruption after changing > > or adding any file to /etc. I'm just generating a developer snapshot. > > Please test the today's snapshot from http://cygwin.com/snapshots/ > > Just replacing /bin/cygwin1.dll with the snapshot DLL is sufficient. Thanks to you and Pawel for your feedback. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple