From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Chen Subject: Re: [next] unix stream crashes Date: Thu, 01 Sep 2011 18:40:45 -0700 Message-ID: <1314927645.2576.2939.camel@schen9-DESK> References: <4E5FEF28.60406@gmail.com> <3179.1314924559@turing-police.cc.vt.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Jiri Slaby , "David S. Miller" , ML netdev , LKML To: Valdis.Kletnieks@vt.edu Return-path: In-Reply-To: <3179.1314924559@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Thu, 2011-09-01 at 20:49 -0400, Valdis.Kletnieks@vt.edu wrote: > On Thu, 01 Sep 2011 22:46:32 +0200, Jiri Slaby said: > > Hi, > > > > my box 100% crashes when booting. It's both in unix socket recv and send > > paths. I've reverted 0856a30409 (Scm: Remove unnecessary pid & > > credential references in Unix socket's send and receive path) and it > > seems to help. > > > > The oops: > > http://www.fi.muni.cz/~xslaby/sklad/panics/af_unix_crash.png > > I was seeing a 100% repeatable crash with the X server starting as well, but > wasn't able to get a traceback because my X server was doing the modeset before > it crashed (so all I got was a black screen) and netconsole is busticated for > me. I can confirm that reverting that one commit allows my box to boot and get > X up and running as well. > Yes, Jiri's log does indicate that something went wrong when releasing the skb, most likely due to changes in the pid and credentials ref count. Unfortunately, I cannot duplicate the problem on my system. Any info on your system to help me debug will be appreciated. I'll try to take another look at the patch tomorrow. Tim