From owner-freebsd-current@FreeBSD.ORG Mon Apr 19 11:15:20 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 90D9916A4CF for ; Mon, 19 Apr 2004 11:15:20 -0700 (PDT) Received: from mail5.speakeasy.net (mail5.speakeasy.net [216.254.0.205]) by mx1.FreeBSD.org (Postfix) with ESMTP id 39E2F43D46 for ; Mon, 19 Apr 2004 11:15:20 -0700 (PDT) (envelope-from jhb@FreeBSD.org) Received: (qmail 17359 invoked from network); 19 Apr 2004 18:15:19 -0000 Received: from dsl027-160-063.atl1.dsl.speakeasy.net (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) encrypted SMTP for ; 19 Apr 2004 18:15:19 -0000 Received: from 10.50.40.205 (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.10/8.12.10) with ESMTP id i3JIF5Aa003723; Mon, 19 Apr 2004 14:15:16 -0400 (EDT) (envelope-from jhb@FreeBSD.org) From: John Baldwin To: freebsd-current@freebsd.org Date: Mon, 19 Apr 2004 13:52:46 -0400 User-Agent: KMail/1.6 References: <20040417153007.GA1885@crodrigues.org> In-Reply-To: <20040417153007.GA1885@crodrigues.org> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200404191352.46793.jhb@FreeBSD.org> X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on server.baldwin.cx cc: Craig Rodrigues Subject: Re: panic booting off of a USB key X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Mon, 19 Apr 2004 18:15:20 -0000 On Saturday 17 April 2004 11:30 am, Craig Rodrigues wrote: > Hi, > > I compiled a -current kernel from a few days ago. > I put the kernel on a USB key. > > When I boot the kernel from the USB key, it starts > up, but then panics sometime after the umass0 > reports that it is attaching to the disk: > > > > > ========================================================================= > umass0: at uhub0 port 1 (addr 2) disconnected > umass0: detached > [0] f:80 typ:7 s(CHS):0/1/1 e(CHS):1023/254/63 s:63 l:117194112 > [1] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0 > [2] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0 > [3] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0 > GEOM: Configure ad0s1, start 32256 length 60003385344 end 60003417599 > umass0: USB Solid state disk, rev 1.10/1.00, addr 2 > umass0:1:0:-1: Attached to scbus1 > > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xc0639e74 > stack pointer = 0x10:0xdf4baaec > frame pointer = 0x10:0xdf4baaf8 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 28 (swi8: tty:sio clock) > kernel: type 12 trap, code=0 > Stopped at _mtx_lock_flags+0x34: cmpl $0xc08a47bc,0(%ebx) > db> t > _mtx_lock_flags(0,0,c083d456,125,c08e5420,0,c083d456,124) at > _mtx_lock_flags+0x34 vm_fault(c103b000,deadc000,1,0,c2279150) at > vm_fault+0x20a > trap_pfault(df4bac64,0,deadc0fe) at trap_pfault+0x104 > trap(c08e0018,10,c0450010,c0452a18,0) at trap+0x2d9 > calltrap() at calltrap+0x5 > --- trap 0xc, eip = 0xc0451a02, esp = 0xdf4baca4, ebp = 0xdf4baca8 --- > xpt_schedule_dev(deadc0f2,c64a5c18,1) at xpt_schedule_dev+0x36 Something accessed a free'd region of memory (see the references to 0xdeadc0de or small offsets thereof). This function might be the place to start looking to see which pointer is stale. > xpt_release_devq_device(c64a5c00,1,1,df4bad04,c064ea3e) at > xpt_release_devq_device+0x99 xpt_release_devq_timeout(c64a5c00) at > xpt_release_devq_timeout+0xf softclock(0) at softclock+0x176 > ithread_loop(c615f300,df4bad48,c615f300,c0631c94,0) at ithread_loop+0x11c > fork_exit(c0631c94,c615f300,df4bad48) at fork_exit+0xa8 > fork_trampoline() at fork_trampoline+0x8 > --- trap 0x1, eip = 0, esp = 0xdf4bad7c, ebp = 0 --- > db> -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org