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Date:      Thu, 17 Apr 2014 22:16:58 +0200
From:      Andrea Venturoli <ml@netfence.it>
To:        freebsd-questions@freebsd.org
Cc:        FreeBSD Panic Reporting <cperciva+panicmail@freebsd.org>
Subject:   Re: Kernel panic
Message-ID:  <535036BA.7040606@netfence.it>
In-Reply-To: <201404171124.s3HBOYTd002436@ns1.biolchim.it>
References:  <201404171124.s3HBOYTd002436@ns1.biolchim.it>

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On 04/17/14 13:24, FreeBSD Panic Reporting wrote:
> A kernel panic has occurred on this system.  You can assist in
> debugging this by allowing some information to be reported
> about this panic.

Hello.
I got the following crash today, while I was playing with MTU values.
AFAICT this is related to bug kern/155585.

I see that bug is closed, because it was "merged to stable/9".
Obviously it is not merged into 8.4; is it in 9.1? 9.2?

  bye & Thanks
	av.


> The following information is contained in the encrypted panic
> report at the end of this email:
>
>> Dump header from device /dev/mfid0s1b
>>    Architecture: amd64
>>    Architecture Version: 2
>>    Dump Length: 1188327424B (1133 MB)
>>    Blocksize: 512
>>    Dumptime: Thu Apr 17 13:20:27 2014
>>    Hostname: xxxxx.xxxxxxxx.xx
>>    Magic: FreeBSD Kernel Dump
>>    Version String: FreeBSD 8.4-RELEASE-p8 #7 r264450: Mon Apr 14 10:35:51 CEST 2014
>>      root@xxxxx.xxxxxxxx.xx:/usr/obj/usr/src/sys/XXXXX
>>    Panic String: double fault
>>    Dump Parity: 2547754091
>>    Bounds: 17
>>    Dump Status: good
>>
>> Backtrace:
>> Reading symbols from /boot/kernel/splash_bmp.ko...Reading symbols from /boot/kernel/splash_bmp.ko.symbols...done.
>> done.
>> Loaded symbols for /boot/kernel/splash_bmp.ko
>> Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
>> done.
>> Loaded symbols for /boot/kernel/linprocfs.ko
>> Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done.
>> done.
>> Loaded symbols for /boot/kernel/linux.ko
>> Reading symbols from /boot/kernel/nullfs.ko...Reading symbols from /boot/kernel/nullfs.ko.symbols...done.
>> done.
>> Loaded symbols for /boot/kernel/nullfs.ko
>> Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from /boot/kernel/fdescfs.ko.symbols...done.
>> done.
>> Loaded symbols for /boot/kernel/fdescfs.ko
>> #0  doadump () at pcpu.h:224
>> 	in pcpu.h
>> (kgdb) #0  doadump () at pcpu.h:224
>> #1  0xffffffff803104f8 in boot (howto=260)
>>      at /usr/src/sys/kern/kern_shutdown.c:443
>> #2  0xffffffff803109e7 in panic (fmt=0x1 <Address 0x1 out of bounds>)
>>      at /usr/src/sys/kern/kern_shutdown.c:634
>> #3  0xffffffff804f74a6 in dblfault_handler (frame=<value optimized out>)
>>      at /usr/src/sys/amd64/amd64/trap.c:875
>> #4  0xffffffff804decad in Xdblfault ()
>>      at /usr/src/sys/amd64/amd64/exception.S:284
>> #5  0xffffffff803ee644 in ipfw_chk (args=0xffffff81aedf9060)
>>      at /usr/src/sys/netinet/ipfw/ip_fw2.c:790
>> #6  0xffffffff803f3a6a in ipfw_check_hook (arg=<value optimized out>,
>>      m0=0xffffff81aedf9228, ifp=0xffffff0005166000, dir=<value optimized out>,
>>      inp=0xffffff01c57ef3f0) at /usr/src/sys/netinet/ipfw/ip_fw_pfil.c:137
>> #7  0xffffffff803cfcbc in pfil_run_hooks (ph=<value optimized out>,
>>      mp=0xffffff81aedf92e8, ifp=0xffffff0005166000, dir=2,
>>      inp=0xffffff01c57ef3f0) at /usr/src/sys/net/pfil.c:82
>> #8  0xffffffff803fc163 in ip_output (m=0xffffff0005cf9000,
>>      opt=<value optimized out>, ro=0xffffff81aedf9300, flags=0, imo=0x0,
>>      inp=0xffffff01c57ef3f0) at /usr/src/sys/netinet/ip_output.c:511
>> #9  0xffffffff8046514b in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1230
>> #10 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #11 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #12 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #13 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #14 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #15 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #16 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #17 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #18 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #19 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #20 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #21 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #22 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #23 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #24 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #25 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #26 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #27 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #28 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #29 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #30 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #31 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #32 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #33 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #34 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #35 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #36 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #37 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #38 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #39 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #40 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #41 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #42 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #43 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #44 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #45 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #46 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #47 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #48 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #49 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #50 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #51 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #52 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #53 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #54 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #55 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #56 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #57 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #58 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #59 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #60 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #61 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #62 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #63 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #64 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #65 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #66 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #67 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #68 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #69 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #70 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #71 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #72 0xffffffff80467ee8 in tcp_mtudisc (inp=0xffffff01c57ef3f0,
>>      mtuoffer=<value optimized out>) at tcp_offload.h:282
>> #73 0xffffffff80465fe4 in tcp_output (tp=0xffffff0073776000)
>>      at /usr/src/sys/netinet/tcp_output.c:1291
>> #74 0xffffffff80470815 in tcp_usr_send (so=0xffffff0198202aa0, flags=0,
>>      m=<value optimized out>, nam=0x0, control=<value optimized out>,
>>      td=0xffffff0005794000) at tcp_offload.h:282
>> #75 0xffffffff803789e6 in sosend_generic (so=0xffffff0198202aa0, addr=0x0,
>>      uio=0xffffff81aedfcad0, top=0xffffff0005bb4700, control=0x0,
>>      flags=<value optimized out>, td=0xffffff0005794000)
>>      at /usr/src/sys/kern/uipc_socket.c:1295
>> #76 0xffffffff8035b3fb in soo_write (fp=<value optimized out>,
>>      uio=0xffffff81aedfcad0, active_cred=<value optimized out>,
>>      flags=<value optimized out>, td=<value optimized out>)
>>      at /usr/src/sys/kern/sys_socket.c:100
>> #77 0xffffffff8035409b in dofilewrite (td=0xffffff0005794000, fd=35,
>>      fp=0xffffff0005724820, auio=0xffffff81aedfcad0,
>>      offset=<value optimized out>, flags=0) at file.h:254
>> #78 0xffffffff803543b0 in kern_writev (td=0xffffff0005794000, fd=35,
>>      auio=0xffffff81aedfcad0) at /usr/src/sys/kern/sys_generic.c:447
>> #79 0xffffffff80354435 in write (td=<value optimized out>,
>>      uap=<value optimized out>) at /usr/src/sys/kern/sys_generic.c:363
>> #80 0xffffffff804f6d14 in amd64_syscall (td=0xffffff0005794000, traced=0)
>>      at subr_syscall.c:114
>> #81 0xffffffff804dee9c in Xfast_syscall ()
>>      at /usr/src/sys/amd64/amd64/exception.S:387
>> #82 0x0000000801cf222c in ?? ()
>> (kgdb)




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