Date: Sun, 24 Jun 2007 22:06:48 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Pascal Hofstee <caelian@gmail.com> Cc: current@freebsd.org Subject: Re: kernel panic during reboot Message-ID: <20070624190648.GI2268@deviant.kiev.zoral.com.ua> In-Reply-To: <1182678019.1042.4.camel@worf> References: <1182678019.1042.4.camel@worf>
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On Sun, Jun 24, 2007 at 11:40:19AM +0200, Pascal Hofstee wrote:
> Hi,
>=20
> After updating CURRENT yesterday (Sat June 23rd) i am now seeing a
> kernel panic during reboot ... i have a crashdump and can provide the
> following backtrace ... if additional information is needed i can
> probably provide it .. just tell me how to obtain it (not too familiar
> with kgdb myself):
>=20
> Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
> Waiting (max 60 seconds) for system process `syncer' to stop...
> Syncing disks, vnodes remaining...7 5 3 2 1 0 1 0 0 0 done
> All buffers synced.
> panic: vput: negative ref cnt
> cpuid =3D 0
> KDB: enter: panic
> panic: from debugger
> cpuid =3D 0
> Uptime: 23m42s
> Physical memory: 2027 MB
> Dumping 128 MB: 113 97 81 65 49 33 17 1
>=20
> #0 doadump () at pcpu.h:195
> 195 __asm __volatile("movl %%fs:0,%0" : "=3Dr" (td));
> (kgdb) backtrace
> #0 doadump () at pcpu.h:195
> #1 0xc075b197 in boot (howto=3D260)
> at /usr/src/sys/kern/kern_shutdown.c:409
> #2 0xc075b48e in panic (fmt=3DVariable "fmt" is not available.
> ) at /usr/src/sys/kern/kern_shutdown.c:563
> #3 0xc0495617 in db_panic (addr=3DCould not find the frame base for
> "db_panic".
> ) at /usr/src/sys/ddb/db_command.c:433
> #4 0xc0495d75 in db_command_loop ()
> at /usr/src/sys/ddb/db_command.c:401
> #5 0xc04977b5 in db_trap (type=3D3, code=3D0)
> at /usr/src/sys/ddb/db_main.c:222
> #6 0xc0782ac5 in kdb_trap (type=3D3, code=3D0, tf=3D0xe45cfafc)
> at /usr/src/sys/kern/subr_kdb.c:502
> #7 0xc0a1a4bb in trap (frame=3D0xe45cfafc)
> at /usr/src/sys/i386/i386/trap.c:620
> #8 0xc09ffc2b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
> #9 0xc0782c42 in kdb_enter (msg=3D0xc0aa8388 "panic") at cpufunc.h:60
> #10 0xc075b474 in panic (fmt=3D0xc0aae946 "vput: negative ref cnt")
> at /usr/src/sys/kern/kern_shutdown.c:547
> #11 0xc07d7783 in vput (vp=3D0xc5b3e990)
> at /usr/src/sys/kern/vfs_subr.c:2176
For start, show the output of "p/x *vp" at this frame.
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