Date: Sun, 4 Aug 2013 15:52:08 -0700 From: Craig Rodrigues <rodrigc@FreeBSD.org> To: "Sam Fourman Jr." <sfourman@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Kernel Panic on FreeBSD 10.0-CURRENT #1 r253918 Message-ID: <CAG=rPVfcu8=10mBLqR_AscJGv274sQbXjjjCCYh7tRRWOnJrMw@mail.gmail.com> In-Reply-To: <CAOFF%2BZ1tPbBkugE2ReRqAPHdmpkOCBFxz-bF9agVhGq4j56Eow@mail.gmail.com> References: <CAOFF%2BZ1tPbBkugE2ReRqAPHdmpkOCBFxz-bF9agVhGq4j56Eow@mail.gmail.com>
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On Sun, Aug 4, 2013 at 12:33 PM, Sam Fourman Jr. <sfourman@gmail.com> wrote: > hello list, > > could someone help me figure out why this machine kernel paniced? > I have a full crashdump file if needed, > this machine is configured as a Firewall and wifi hostap running pf in a > small office > > > here is a mailing list post to someone that had a similar problem a few > years back > http://lists.freebsd.org/pipermail/freebsd-bugs/2011-April/043985.html > > a backtrace, full dmesg, and kernel config are below > > > kgdb /boot/kernel/kernel /var/crash/vmcore.0 > #4 0xffffffff80bd6027 in trap_pfault (frame=0x0, usermode=<value optimized > out>) at /usr/src/sys/amd64/amd64/trap.c:699 > #5 0xffffffff80bd5876 in trap (frame=0xffffff80002787c0) at > /usr/src/sys/amd64/amd64/trap.c:463 > #6 0xffffffff80bc06b2 in calltrap () at > /usr/src/sys/amd64/amd64/exception.S:232 > #7 0xffffffff809937a8 in in6_tmpaddrtimer (arg=0xfffffe00170fc0b6) at > /usr/src/sys/netinet6/in6_ifattach.c:935 > #8 0xffffffff8085140a in softclock_call_cc (c=0xffffffff81325210, > cc=0xffffffff8131c700, direct=0) at /usr/src/sys/kern/kern_timeout.c:674 > #9 0xffffffff80851704 in softclock (arg=<value optimized out>) at > /usr/src/sys/kern/kern_timeout.c:802 > #10 0xffffffff80815dc3 in intr_event_execute_handlers (p=<value optimized > out>, ie=0xfffffe0014ab3400) at /usr/src/sys/kern/kern_intr.c:1263 > #11 0xffffffff80816716 in ithread_loop (arg=0xfffffe0014a896e0) at > /usr/src/sys/kern/kern_intr.c:1276 > #12 0xffffffff80813b31 in fork_exit (callout=0xffffffff80816680 > <ithread_loop>, arg=0xfffffe0014a896e0, frame=0xffffff8000278a40) at > /usr/src/sys/kern/kern_fork.c:991 > #13 0xffffffff80bc0bee in fork_trampoline () at > /usr/src/sys/amd64/amd64/exception.S:606 > #14 0x0000000000000000 in ?? () > Current language: auto; currently minimal > (kgdb) > > > You have VIMAGE enabled in your kernel config. I have debugged a few of these VIMAGE problems before. Can you do the following for me: (1) Download John's gdb scripts from: http://people.freebsd.org/~jhb/gdb/ . Put them in a directory such as $HOME/gdb/ (2) Go to the kernel source directory. You must be in this directory for the gdb macros to work: cd /usr/src (3) Start kgdb: kgdb /usr/obj/sys/conf/GENERIC/kernel.debug /var/crash/vmcore [ tune that line to where your kernel.debug is ] (4) Load the gdb scripts: source /home/mydir/gdb/gdb6 (5) Go to the frame where the problem occurred. For you it is in frame 7 in6_tmpaddrtimer.c (kgdb) frame 7 (6) Find the thread id of the active thread using this: (kgdb) i thr There will be an asterisk besides the active thread such as: * 301 Thread 100515 (PID=551: at-spi-bus-launcher) 0xffffffff8094fdc6 in sched_switch (td=0xfffffe0009f43000, newtd=<value optimized out>, (7) Using the thread id obtain in step 6, look up the value of curthread, and assign it to the $td variable, for example: (kgdb) lookup_thread 301 $td 0 (8) Print out the value of $td and derference it just like any other gdb variable (kgdb) p $td (9) Print out the value of td->td_vnet (kgdb) p $td->td_vnet I suspect td_vnet is NULL, but please confirm. -- Craig
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