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Date:      Wed, 04 Oct 2017 08:09:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ipfw@FreeBSD.org
Subject:   [Bug 222746] ipfw: tcpdatalen does not exactly match IPv6 packets.
Message-ID:  <bug-222746-7515-HHJxfqj790@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-222746-7515@https.bugs.freebsd.org/bugzilla/>
References:  <bug-222746-7515@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222746

Andrey V. Elsukov <ae@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ae@FreeBSD.org

--- Comment #2 from Andrey V. Elsukov <ae@FreeBSD.org> ---
(In reply to Tatsuki Makino from comment #1)
> Created attachment 186894 [details]
> patch for CURRENT
>=20
> attachment 186874 [details] reused the variable iplen. But iplen overflows
> when ip6_plen is greater than 65495.
> The new patch does not use the sum of header size and payload size.

You need to handle the case when ip6_plen =3D=3D 0.

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