From owner-freebsd-current@freebsd.org Thu Sep 28 18:44:08 2017 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0FD16E05DD3 for ; Thu, 28 Sep 2017 18:44:08 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from mail.baldwin.cx (bigwig.baldwin.cx [96.47.65.170]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B8435694CB for ; Thu, 28 Sep 2017 18:44:07 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from ralph.baldwin.cx (c-73-231-226-104.hsd1.ca.comcast.net [73.231.226.104]) by mail.baldwin.cx (Postfix) with ESMTPSA id A497310AB01; Thu, 28 Sep 2017 14:44:00 -0400 (EDT) From: John Baldwin To: freebsd-current@freebsd.org, sgk@troutmask.apl.washington.edu Subject: Re: panic: softdep_deallocate_dependencies: dangling deps Date: Thu, 28 Sep 2017 11:03:46 -0700 Message-ID: <25204210.C6pJgIpUy0@ralph.baldwin.cx> User-Agent: KMail/4.14.10 (FreeBSD/11.1-STABLE; KDE/4.14.30; amd64; ; ) In-Reply-To: <20170927221321.GA1023@troutmask.apl.washington.edu> References: <20170927221321.GA1023@troutmask.apl.washington.edu> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.4.3 (mail.baldwin.cx); Thu, 28 Sep 2017 14:44:00 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.99.2 at mail.baldwin.cx X-Virus-Status: Clean X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.23 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, 28 Sep 2017 18:44:08 -0000 On Wednesday, September 27, 2017 03:13:21 PM Steve Kargl wrote: > Just got this panic on > > FreeBSD troutmask.apl.washington.edu 12.0-CURRENT FreeBSD 12.0-CURRENT > #0 r321800: Mon Jul 31 13:48:43 PDT 2017 > kargl@:/data/obj/usr/src/sys/SPEW amd64 > > core.txt.0 contains > > panic: softdep_deallocate_dependencies: dangling deps > cpuid = 7 > time = 1506549566 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe023a281710 > vpanic() at vpanic+0x19c/frame 0xfffffe023a281790 > panic() at panic+0x43/frame 0xfffffe023a2817f0 > softdep_deallocate_dependencies() at softdep_deallocate_dependencies+0x76/frame 0xfffffe023a281810 > brelse() at brelse+0x149/frame 0xfffffe023a281870 > bufwrite() at bufwrite+0x65/frame 0xfffffe023a2818b0 > softdep_process_journal() at softdep_process_journal+0x7a8/frame 0xfffffe023a281950 > softdep_process_worklist() at softdep_process_worklist+0x80/frame 0xfffffe023a2819b0 > softdep_flush() at softdep_flush+0xff/frame 0xfffffe023a2819f0 > fork_exit() at fork_exit+0x75/frame 0xfffffe023a281a30 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe023a281a30 > --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > > __curthread () at ./machine/pcpu.h:232 > 232 __asm("movq %%gs:%1,%0" : "=r" (td) > (kgdb) #0 __curthread () at ./machine/pcpu.h:232 > #1 doadump (textdump=1) at /usr/src/sys/kern/kern_shutdown.c:318 > #2 0xffffffff805879eb in kern_reboot (howto=260) > at /usr/src/sys/kern/kern_shutdown.c:386 > #3 0xffffffff80587e66 in vpanic (fmt=, ap=0xfffffe023a2817d0) > at /usr/src/sys/kern/kern_shutdown.c:779 > #4 0xffffffff80587c83 in panic (fmt=) > at /usr/src/sys/kern/kern_shutdown.c:710 > #5 0xffffffff80787f56 in softdep_deallocate_dependencies ( > bp=0xfffffe01f008d8b8) at /usr/src/sys/ufs/ffs/ffs_softdep.c:14304 > #6 0xffffffff8061dd69 in buf_deallocate (bp=0xfffffe01f008d8b8) > at /usr/src/sys/sys/buf.h:429 > #7 brelse (bp=0xfffffe01f008d8b8) at /usr/src/sys/kern/vfs_bio.c:2348 > #8 0xffffffff8061b9e5 in bufwrite (bp=0xfffffe01f008d8b8) > at /usr/src/sys/kern/vfs_bio.c:1914 > #9 0xffffffff8079bec8 in softdep_process_journal (mp=, > needwk=0x0, flags=) > at /usr/src/sys/ufs/ffs/ffs_softdep.c:3559 > #10 0xffffffff80785dc0 in softdep_process_worklist (mp=0xfffff80007eef000, > full=0) at /usr/src/sys/ufs/ffs/ffs_softdep.c:1592 > #11 0xffffffff807894ff in softdep_flush (addr=0xfffff80007eef000) > at /usr/src/sys/ufs/ffs/ffs_softdep.c:1397 > #12 0xffffffff80555075 in fork_exit ( > callout=0xffffffff80789400 , arg=0xfffff80007eef000, > frame=0xfffffe023a281a40) at /usr/src/sys/kern/kern_fork.c:1038 > #13 > (kgdb) > > Hmmm, > > % kgdb /usr/lib/debug/boot/kernel/kernel.debug vmcore.0 > GNU gdb (GDB) 8.0 [GDB v8.0 for FreeBSD] > Copyright (C) 2017 Free Software Foundation, Inc. > Type "apropos word" to search for commands related to "word"... > Reading symbols from /usr/lib/debug/boot/kernel/kernel.debug...done. > ABI doesn't support a vmcore target > > OK, so debugging is broken :-/ Run the debugger on the binary, not the debug symbols: kgdb /boot/kernel/kernel vmcore.0 -- John Baldwin