From owner-freebsd-current@FreeBSD.ORG Thu Feb 14 17:50:17 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id F2093424 for ; Thu, 14 Feb 2013 17:50:17 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from esa-jnhn.mail.uoguelph.ca (esa-jnhn.mail.uoguelph.ca [131.104.91.44]) by mx1.freebsd.org (Postfix) with ESMTP id BAB3B248 for ; Thu, 14 Feb 2013 17:50:17 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqAEAPkiHVGDaFvO/2dsb2JhbABEFoYzujdzgh8BAQQBI1YbGAICDRkCWQaIHwYMqnGSMYEjjBeDN4ETA4hmjT6BHY82gyWBVDU X-IronPort-AV: E=Sophos;i="4.84,666,1355115600"; d="scan'208";a="16678101" Received: from erie.cs.uoguelph.ca (HELO zcs3.mail.uoguelph.ca) ([131.104.91.206]) by esa-jnhn.mail.uoguelph.ca with ESMTP; 14 Feb 2013 12:50:16 -0500 Received: from zcs3.mail.uoguelph.ca (localhost.localdomain [127.0.0.1]) by zcs3.mail.uoguelph.ca (Postfix) with ESMTP id 3E7C9B3F26; Thu, 14 Feb 2013 12:50:16 -0500 (EST) Date: Thu, 14 Feb 2013 12:50:16 -0500 (EST) From: Rick Macklem To: =?utf-8?Q?Elias_M=C3=A5rtenson?= Message-ID: <548883210.3022878.1360864216238.JavaMail.root@erie.cs.uoguelph.ca> In-Reply-To: Subject: Re: Possible bug in NFSv4 with krb5p security? MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [172.17.91.203] X-Mailer: Zimbra 6.0.10_GA_2692 (ZimbraWebClient - FF3.0 (Win)/6.0.10_GA_2692) Cc: freebsd-current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Feb 2013 17:50:18 -0000 Elias Martenson wrote: > Thank you for your help. I'm currently in the process of analysing > what is happening inside gssd during these operations. I'll get back > later with a summary of my findings. > > > However, I have found a real bug this time. An honest to FSM kernel > crash. This is how I reproduced it: > > > - Kill gssd > - Attempt to mount a kerberised NFS mount from the Linux machine > - The mount attempt will hang because gssd isn't running > - While the mount is hung, start gssd > - Kernel crash > > > What should I do about that one? > There was a patch applied to head about 2 months ago (r244370) to stop crashes when the gssd was restarted. The patch is also here: http://people.freebsd.org/~rmacklem/kgssapi.patch I don't remember if you mentioned which kernel version you are running, but this would also be in stable/9 of about 6 weeks ago, but not in 9.1-release. If your system has this patch and still crashes, please email the backtrace for the crash. You can take a photo of it, if it is a screen console. rick > > Regards, > Elias