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Date:      Tue, 22 Jan 2019 07:47:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 235097] ci runs panic with use-after-free when running sys/netpfil/pf/nat tests
Message-ID:  <bug-235097-7501-O1HFBtYKKq@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-235097-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-235097-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235097

Bjoern A. Zeeb <bz@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bz@FreeBSD.org
            Summary|ci runs failing with panic  |ci runs panic with
                   |in IPv6 code with           |use-after-free when running
                   |use-after-free in           |sys/netpfil/pf/nat tests
                   |epair/pfctl when running    |
                   |sys/netpfil/pf/nat tests    |

--- Comment #5 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
(In reply to Li-Wen Hsu from comment #1)

Why do you think these two revision numbers have introduced the problem?=20
Because if they did the search pattern is very small.  Just trying to
understand.

(In reply to Kristof Provost from comment #4)

Depending on the answer above it could be anything (a x++, refcount, ..).  =
It
doesn't have to be a counter(9) increment.  It could also be anywhere in the
code, not necessarily the network stack where this happens.  It's just that=
 the
test cases run a lot of network stack code, which means it's most likely to=
 be
the next allocation that then finds the modified memory.

--=20
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