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Subject: [Bug 224218] Kernel panic in SCTP/IpV6 server mode
Date: Sun, 10 Dec 2017 00:35:00 +0000
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X-Bugzilla-Type: new
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 11.1-RELEASE
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X-Bugzilla-Severity: Affects Only Me
X-Bugzilla-Who: hshreesh@yahoo.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224218

            Bug ID: 224218
           Summary: Kernel panic in SCTP/IpV6 server mode
           Product: Base System
           Version: 11.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: hshreesh@yahoo.com

If SCTP under IpV6 is used in server mode on FreeBSD and a client connects
in[from an external device - I used linux/Ubuntu), there is a kernel panic =
and
of course reboot of the FreeBSD host.

Steps to reproduce:
On FreeBSD host: ncat --sctp -l <IpV6 Address of localhost> <port #>
On external machine such as Ubuntu: ncat --sctp <IpV6 address of FreeBSD ho=
st>
<port # of listener on FreeBSD above>

Instantly there is a panic on the FreeBSD host.
Running the same in IpV4 mode or reversing the flow i.e. FreeBSD client to
Linux server runs fine.

This does not seem to be the ICMPV6 issue that recently showed up. Also, I =
have
applied all patches via "freebsd-update fetch".

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