Date: Thu, 9 May 2019 11:22:55 -0700 From: Gleb Smirnoff <glebius@freebsd.org> To: Michael Butler <imb@protected-networks.net> Cc: Kyle Evans <kevans@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: at SVN r347375, terminating/restarting openvpn on tap causes panic Message-ID: <20190509182255.GU1243@FreeBSD.org> In-Reply-To: <CACNAnaHcKu_78sWizSAf46xZcphcpgXCFqXjo_FEAKogQybRNA@mail.gmail.com> References: <58ad8292-a24b-b9ce-a1a2-3e159f42ed78@protected-networks.net> <CACNAnaGPvDBM=BdVcc1j8TfMwwosebAnALdJ6DO1mvR%2BDsHL8w@mail.gmail.com> <5333dd8d-9e01-f748-1b79-5dd1b22bf15f@protected-networks.net> <CACNAnaHcKu_78sWizSAf46xZcphcpgXCFqXjo_FEAKogQybRNA@mail.gmail.com>
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Michael, On Thu, May 09, 2019 at 10:25:37AM -0500, Kyle Evans wrote: K> > #0 doadump () at src/sys/amd64/include/pcpu.h:241 K> > #1 0xffffffff808393c8 in kern_reboot (howto=260) at K> > /usr/src/sys/kern/kern_shutdown.c:470 K> > #2 0xffffffff80839826 in vpanic (fmt=<value optimized out>, ap=<value K> > optimized out>) at /usr/src/sys/kern/kern_shutdown.c:896 K> > #3 0xffffffff80839663 in panic (fmt=<value optimized out>) at K> > /usr/src/sys/kern/kern_shutdown.c:823 K> > #4 0xffffffff80c318a6 in trap_fatal (frame=0xfffffe0072b14510, eva=156) K> > at /usr/src/sys/amd64/amd64/trap.c:946 K> > #5 0xffffffff80c31c59 in trap_pfault (frame=0xfffffe0072b14510, K> > usermode=0) at src/sys/amd64/include/cpufunc.h:423 K> > #6 0xffffffff80c30fde in trap (frame=0xfffffe0072b14510) at K> > /usr/src/sys/amd64/amd64/trap.c:441 K> > #7 0xffffffff80c0d4b5 in calltrap () at K> > /usr/src/sys/amd64/amd64/exception.S:232 K> > #8 0xffffffff80a15377 in ip_output (m=<value optimized out>, opt=<value K> > optimized out>, ro=0x0, flags=0, imo=0xfffffe0072b14780, inp=0x0) at K> > /usr/src/sys/netinet/ip_output.c:362 K> > #9 0xffffffff809ffea4 in igmp_intr (m=<value optimized out>) at K> > /usr/src/sys/netinet/igmp.c:3455 K> > #10 0xffffffff80975a0f in netisr_dispatch_src (proto=2, source=<value K> > optimized out>, m=<value optimized out>) at /usr/src/sys/net/netisr.c:1122 K> > #11 0xffffffff809fe07a in igmp_fasttimo () at K> > /usr/src/sys/netinet/igmp.c:496 K> > #12 0xffffffff808c5854 in pffasttimo (arg=<value optimized out>) at K> > /usr/src/sys/kern/uipc_domain.c:521 K> > #13 0xffffffff80853df3 in softclock_call_cc (c=0xffffffff813f7f48, K> > cc=0xffffffff814c9ac0, direct=0) at /usr/src/sys/kern/kern_timeout.c:731 K> > #14 0xffffffff808542b9 in softclock (arg=0xffffffff814c9ac0) at K> > /usr/src/sys/kern/kern_timeout.c:869 K> > #15 0xffffffff807fd0c4 in ithread_loop (arg=<value optimized out>) at K> > /usr/src/sys/kern/kern_intr.c:1129 K> > #16 0xffffffff807f9f33 in fork_exit (callout=0xffffffff807fcef0 K> > <ithread_loop>, arg=0xfffff800025f10a0, frame=0xfffffe0072b14ac0) at K> > /usr/src/sys/kern/kern_fork.c:1058 K> > #17 0xffffffff80c0e4ae in fork_trampoline () at K> > /usr/src/sys/amd64/amd64/exception.S:995 K> > #18 0x0000000000000000 in ?? () K> > K> K> Ah, I misread your backtrace (and forgot the proper tap detachment K> from my previous patch, so that's fixed/committed anyways). CC'ing K> Gleb for further triage as committer of r347375 that touched things in K> this path. Michael, can you please dump a core and look at it in kgdb? Line 362 in ip_output() really belongs to part that had minimal change with r347375. So I need more details. Can you please print out in kgdb the following variables: imo, ifp, ia? -- Gleb Smirnoff
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