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Date:      Tue, 9 Dec 2014 11:05:24 -0800
From:      Ben Perrault <ben.perrault@gmail.com>
To:        Shawn Webb <lattera@gmail.com>
Cc:        FreeBSD-current <freebsd-current@freebsd.org>
Subject:   Re: re(4) use-after-free
Message-ID:  <4B228C62-387D-4664-AEC7-BB013B776BB1@gmail.com>
In-Reply-To: <CADt0fhzhjYNASGy1h8Ve8f9RbHBrktvAk2-pFHPQgOgx%2BAifxA@mail.gmail.com>
References:  <CADt0fhzhjYNASGy1h8Ve8f9RbHBrktvAk2-pFHPQgOgx%2BAifxA@mail.gmail.com>

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Shawn, I have the same problem on a Lenovo Y40 and a few other systems with t=
hat interface. To work around it, I've done:

ifconfig re0 down=20
ifconfig re0 -tso
ifconfig re0 up ( and give it a go 15 seconds ) and dhclient should do it's t=
hing.

The only way I've been able to get -tso and DHCP together at boot is to plac=
e the re0 in a lagg group.

Hope that helps,
Cheers,
-bp

"Remember - no matter where you go, there you are."
- Buckaroo Banzai

> On Dec 9, 2014, at 8:36 AM, Shawn Webb <lattera@gmail.com> wrote:
>=20
> Hey FreeBSD Peeps,
>=20
> I just got a new laptop (Lenovo Y50-70) that has a Realtek RTL8111/8168B
> NIC in it. When running `dhclient re0`, I get a message on the console fro=
m
> the kernel:
>=20
> Memory modified after free 0xfffff8001bd85800(2048) val=3Dffffffff @
> 0xfffff8001bd85800
>=20
> re0 fails to grab an IP via DHCP. And if I set it statically, I get 100%
> packet drops. Nothing comes in and nothing goes out.
>=20
> Thanks,
>=20
> Shawn
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