Re: traceroute6: panic: pcb not read locked

From: Adrian Chadd <adrian.chadd_at_gmail.com>
Date: Fri, 7 Aug 2015 18:29:45 -0700
is it easily reproducable for you there?



-a


On 7 August 2015 at 18:04, Larry Rosenman <ler_at_lerctr.org> wrote:
> Trying to debug TimeWarner IPV6 to my HE.NET tunnel, and running traceroute6,
> got the following panic:
>
> borg.lerctr.org dumped core - see /var/crash/vmcore.0
>
> Fri Aug  7 19:58:40 CDT 2015
>
> FreeBSD borg.lerctr.org 11.0-CURRENT FreeBSD 11.0-CURRENT #32 r286338: Wed Aug  5 15:57:55 CDT 2015     root_at_borg.lerctr.org:/usr/obj/usr/src/sys/VT-LER  amd64
>
> panic: Lock tcp not read locked _at_ /usr/src/sys/netinet/tcp_subr.c:1189
>
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "amd64-marcel-freebsd"...
>
> Unread portion of the kernel message buffer:
> panic: Lock tcp not read locked _at_ /usr/src/sys/netinet/tcp_subr.c:1189
>
> cpuid = 2
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe2dfc3ef400
> vpanic() at vpanic+0x189/frame 0xfffffe2dfc3ef480
> panic() at panic+0x43/frame 0xfffffe2dfc3ef4e0
> __rw_assert() at __rw_assert+0x154/frame 0xfffffe2dfc3ef4f0
> tcp_notify() at tcp_notify+0x2d/frame 0xfffffe2dfc3ef520
> in6_pcbnotify() at in6_pcbnotify+0x2a0/frame 0xfffffe2dfc3ef5b0
> tcp6_ctlinput() at tcp6_ctlinput+0xf4/frame 0xfffffe2dfc3ef650
> icmp6_input() at icmp6_input+0x1737/frame 0xfffffe2dfc3ef7f0
> ip6_input() at ip6_input+0x4a2/frame 0xfffffe2dfc3ef8d0
> netisr_dispatch_src() at netisr_dispatch_src+0x86/frame 0xfffffe2dfc3ef940
> ether_demux() at ether_demux+0x176/frame 0xfffffe2dfc3ef970
> ether_nh_input() at ether_nh_input+0x33a/frame 0xfffffe2dfc3ef9b0
> netisr_dispatch_src() at netisr_dispatch_src+0x86/frame 0xfffffe2dfc3efa20
> ether_input() at ether_input+0x4f/frame 0xfffffe2dfc3efa50
> if_input() at if_input+0xa/frame 0xfffffe2dfc3efa60
> em_rxeof() at em_rxeof+0x27f/frame 0xfffffe2dfc3efae0
> em_handle_que() at em_handle_que+0x40/frame 0xfffffe2dfc3efb20
> taskqueue_run_locked() at taskqueue_run_locked+0xf0/frame 0xfffffe2dfc3efb80
> taskqueue_thread_loop() at taskqueue_thread_loop+0x88/frame 0xfffffe2dfc3efbb0
> fork_exit() at fork_exit+0x84/frame 0xfffffe2dfc3efbf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe2dfc3efbf0
> --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
> Uptime: 19m58s
> Dumping 2903 out of 64454 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
>
> Reading symbols from /boot/kernel/linux.ko.symbols...done.
> Loaded symbols for /boot/kernel/linux.ko.symbols
> Reading symbols from /boot/kernel/linux_common.ko.symbols...done.
> Loaded symbols for /boot/kernel/linux_common.ko.symbols
> Reading symbols from /boot/kernel/if_lagg.ko.symbols...done.
> Loaded symbols for /boot/kernel/if_lagg.ko.symbols
> Reading symbols from /boot/kernel/snd_envy24ht.ko.symbols...done.
> Loaded symbols for /boot/kernel/snd_envy24ht.ko.symbols
> Reading symbols from /boot/kernel/snd_spicds.ko.symbols...done.
> Loaded symbols for /boot/kernel/snd_spicds.ko.symbols
> Reading symbols from /boot/kernel/coretemp.ko.symbols...done.
> Loaded symbols for /boot/kernel/coretemp.ko.symbols
> Reading symbols from /boot/kernel/ichsmb.ko.symbols...done.
> Loaded symbols for /boot/kernel/ichsmb.ko.symbols
> Reading symbols from /boot/kernel/smbus.ko.symbols...done.
> Loaded symbols for /boot/kernel/smbus.ko.symbols
> Reading symbols from /boot/kernel/ichwd.ko.symbols...done.
> Loaded symbols for /boot/kernel/ichwd.ko.symbols
> Reading symbols from /boot/kernel/cpuctl.ko.symbols...done.
> Loaded symbols for /boot/kernel/cpuctl.ko.symbols
> Reading symbols from /boot/kernel/cryptodev.ko.symbols...done.
> Loaded symbols for /boot/kernel/cryptodev.ko.symbols
> Reading symbols from /boot/kernel/dtraceall.ko.symbols...done.
> Loaded symbols for /boot/kernel/dtraceall.ko.symbols
> Reading symbols from /boot/kernel/profile.ko.symbols...done.
> Loaded symbols for /boot/kernel/profile.ko.symbols
> Reading symbols from /boot/kernel/dtrace.ko.symbols...done.
> Loaded symbols for /boot/kernel/dtrace.ko.symbols
> Reading symbols from /boot/kernel/systrace_freebsd32.ko.symbols...done.
> Loaded symbols for /boot/kernel/systrace_freebsd32.ko.symbols
> Reading symbols from /boot/kernel/systrace.ko.symbols...done.
> Loaded symbols for /boot/kernel/systrace.ko.symbols
> Reading symbols from /boot/kernel/sdt.ko.symbols...done.
> Loaded symbols for /boot/kernel/sdt.ko.symbols
> Reading symbols from /boot/kernel/fasttrap.ko.symbols...done.
> Loaded symbols for /boot/kernel/fasttrap.ko.symbols
> Reading symbols from /boot/kernel/fbt.ko.symbols...done.
> Loaded symbols for /boot/kernel/fbt.ko.symbols
> Reading symbols from /boot/kernel/dtnfscl.ko.symbols...done.
> Loaded symbols for /boot/kernel/dtnfscl.ko.symbols
> Reading symbols from /boot/kernel/dtmalloc.ko.symbols...done.
> Loaded symbols for /boot/kernel/dtmalloc.ko.symbols
> Reading symbols from /boot/modules/nvidia.ko...done.
> Loaded symbols for /boot/modules/nvidia.ko
> Reading symbols from /boot/kernel/ipmi.ko.symbols...done.
> Loaded symbols for /boot/kernel/ipmi.ko.symbols
> Reading symbols from /boot/kernel/ipmi_linux.ko.symbols...done.
> Loaded symbols for /boot/kernel/ipmi_linux.ko.symbols
> Reading symbols from /boot/kernel/radeonkms.ko.symbols...done.
> Loaded symbols for /boot/kernel/radeonkms.ko.symbols
> Reading symbols from /boot/kernel/iicbb.ko.symbols...done.
> Loaded symbols for /boot/kernel/iicbb.ko.symbols
> Reading symbols from /boot/kernel/iicbus.ko.symbols...done.
> Loaded symbols for /boot/kernel/iicbus.ko.symbols
> Reading symbols from /boot/kernel/iic.ko.symbols...done.
> Loaded symbols for /boot/kernel/iic.ko.symbols
> Reading symbols from /boot/kernel/drm2.ko.symbols...done.
> Loaded symbols for /boot/kernel/drm2.ko.symbols
> Reading symbols from /boot/kernel/radeonkmsfw_R100_cp.ko.symbols...done.
> Loaded symbols for /boot/kernel/radeonkmsfw_R100_cp.ko.symbols
> Reading symbols from /boot/kernel/uhid.ko.symbols...done.
> Loaded symbols for /boot/kernel/uhid.ko.symbols
> Reading symbols from /boot/kernel/linux64.ko.symbols...done.
> Loaded symbols for /boot/kernel/linux64.ko.symbols
> Reading symbols from /boot/kernel/pf.ko.symbols...done.
> Loaded symbols for /boot/kernel/pf.ko.symbols
> #0  doadump (textdump=1) at pcpu.h:221
> 221     pcpu.h: No such file or directory.
>         in pcpu.h
> (kgdb) #0  doadump (textdump=1) at pcpu.h:221
> #1  0xffffffff80b2b255 in kern_reboot (howto=260)
>     at /usr/src/sys/kern/kern_shutdown.c:329
> #2  0xffffffff80b2b848 in vpanic (fmt=<value optimized out>,
>     ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:626
> #3  0xffffffff80b2b893 in panic (fmt=0x0)
>     at /usr/src/sys/kern/kern_shutdown.c:557
> #4  0xffffffff80b29764 in __rw_assert (c=0x0, what=<value optimized out>,
>     file=0x0, line=0) at /usr/src/sys/kern/kern_rwlock.c:1183
> #5  0xffffffff80ceba5d in tcp_notify (inp=0xfffff80090798960, error=61)
>     at /usr/src/sys/netinet/tcp_subr.c:1189
> #6  0xffffffff80d0cd20 in in6_pcbnotify (pcbinfo=<value optimized out>,
>     dst=0xfffffe2dfc3ef720, fport_arg=13568, src=<value optimized out>,
>     lport_arg=<value optimized out>, cmd=<value optimized out>,
>     notify=0xffffffff80ceba30 <tcp_notify>)
>     at /usr/src/sys/netinet6/in6_pcb.c:679
> #7  0xffffffff80cebf24 in tcp6_ctlinput (cmd=10, sa=0xfffffe2dfc3ef720,
>     d=0xfffffe2dfc3ef6d8) at /usr/src/sys/netinet/tcp_subr.c:1641
> #8  0xffffffff80cfc607 in icmp6_input (mp=<value optimized out>,
>     offp=0xfffffe2dfc3ef81c, proto=0) at /usr/src/sys/netinet6/icmp6.c:1155
> #9  0xffffffff80d10f72 in ip6_input (m=0xfffff80049c65100)
>     at /usr/src/sys/netinet6/ip6_input.c:810
> #10 0xffffffff80c10026 in netisr_dispatch_src (proto=<value optimized out>,
>     source=<value optimized out>, m=0xfffff80049c65100)
>     at /usr/src/sys/net/netisr.c:972
> #11 0xffffffff80c06ec6 in ether_demux (ifp=<value optimized out>,
>     m=<value optimized out>) at /usr/src/sys/net/if_ethersubr.c:768
> #12 0xffffffff80c07b7a in ether_nh_input (m=<value optimized out>)
>     at /usr/src/sys/net/if_ethersubr.c:575
> #13 0xffffffff80c10026 in netisr_dispatch_src (proto=<value optimized out>,
>     source=<value optimized out>, m=0xfffff80049c65100)
>     at /usr/src/sys/net/netisr.c:972
> #14 0xffffffff80c071af in ether_input (ifp=0xfffff8002c6d5800, m=0x0)
>     at /usr/src/sys/net/if_ethersubr.c:676
> #15 0xffffffff80c03f4a in if_input (ifp=0x0, sendmp=0x0)
>     at /usr/src/sys/net/if.c:3847
> #16 0xffffffff8061d01f in em_rxeof (count=99)
>     at /usr/src/sys/dev/e1000/if_em.c:4666
> #17 0xffffffff8061c940 in em_handle_que (context=0xfffffe1ea96cb000,
>     pending=<value optimized out>) at /usr/src/sys/dev/e1000/if_em.c:1564
> #18 0xffffffff80b78ca0 in taskqueue_run_locked (queue=0xfffff8002c6d4300)
>     at /usr/src/sys/kern/subr_taskqueue.c:430
> #19 0xffffffff80b79778 in taskqueue_thread_loop (arg=<value optimized out>)
>     at /usr/src/sys/kern/subr_taskqueue.c:683
> #20 0xffffffff80af2154 in fork_exit (
>     callout=0xffffffff80b796f0 <taskqueue_thread_loop>,
>     arg=0xfffffe1ea96cd730, frame=0xfffffe2dfc3efc00)
>     at /usr/src/sys/kern/kern_fork.c:1006
> #21 0xffffffff80f514ce in fork_trampoline ()
>     at /usr/src/sys/amd64/amd64/exception.S:610
> #22 0x0000000000000000 in ?? ()
> Current language:  auto; currently minimal
> (kgdb)
>
>
> Core *IS* available.
>
> FreeBSD borg.lerctr.org 11.0-CURRENT FreeBSD 11.0-CURRENT #32 r286338: Wed Aug  5 15:57:55 CDT 2015     root_at_borg.lerctr.org:/usr/obj/usr/src/sys/VT-LER  amd64 1100077 1100077
>
>
> 11.0-CURRENT
> --
> Larry Rosenman                     http://www.lerctr.org/~ler
> Phone: +1 214-642-9640                 E-Mail: ler_at_lerctr.org
> US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961
> _______________________________________________
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Received on Fri Aug 07 2015 - 23:29:47 UTC

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