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Date:      Mon, 14 Jun 2021 23:33:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 256610] Kernel panic with ngtee
Message-ID:  <bug-256610-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256610

            Bug ID: 256610
           Summary: Kernel panic with ngtee
           Product: Base System
           Version: 13.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: niels=3Dfreebsd@bakker.net

Created attachment 225814
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D225814&action=
=3Dedit
savecore

With the following in /etc/rc.conf:

ipfw_netflow_enable=3D"YES"
ipfw_netflow_rule=3D1111
ipfw_netflow_ip=3D"192.168.1.2"
ipfw_netflow_port=3D9995
ipfw_netflow_version=3D9

I can reliably get a kernel panic as soon as there is network traffic betwe=
en a
host on the LAN and a jail whose IPv4 address is attached to a VLAN interfa=
ce
which also has a bridge by vm-bhyve. 192.168.1.2 is another jail on the loc=
al
machine. This is a kernel compiled with INVARIANTS but it also panics witho=
ut,
and did so on 13.0-RELEASE.

#9  memmove_erms () at /usr/src/sys/amd64/amd64/support.S:547
#10 0xffffffff80c80f18 in m_dup (m=3D0xfffff8021e841200,=20
    m@entry=3D0xfffff801345d9d00, how=3Dhow@entry=3D1)
    at /usr/src/sys/kern/uipc_mbuf.c:722
#11 0xffffffff834ab3c1 in ng_ipfw_input (m0=3D<optimized out>,=20
    fwa=3D0xfffffe0144090300, tee=3Dfalse) at /usr/src/sys/netgraph/ng_ipfw=
.c:324
#12 0xffffffff82936df0 in ipfw_check_packet (m0=3D0xfffffe01440904e8,=20
    ifp=3D0xfffff80004e5b800, flags=3D131072, ruleset=3D<optimized out>,=20
    inp=3D0xfffff8004cff35b8) at /usr/src/sys/netpfil/ipfw/ip_fw_pfil.c:297
#13 0xffffffff80d2a8c7 in pfil_run_hooks (head=3D<optimized out>, p=3D...,=
=20
    ifp=3Difp@entry=3D0xfffff80004e5b800, flags=3Dflags@entry=3D131072,=20
    inp=3Dinp@entry=3D0xfffff8004cff35b8) at /usr/src/sys/net/pfil.c:187

Possibly related to Bug #256439.

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