From owner-freebsd-net@freebsd.org Thu Oct 13 09:12:41 2016
Return-Path: <owner-freebsd-net@freebsd.org>
Delivered-To: freebsd-net@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
[IPv6:2001:1900:2254:206a::19:1])
by mailman.ysv.freebsd.org (Postfix) with ESMTP id 708ADC10B8D
for <freebsd-net@mailman.ysv.freebsd.org>;
Thu, 13 Oct 2016 09:12:41 +0000 (UTC)
(envelope-from bugzilla-noreply@freebsd.org)
Received: from kenobi.freebsd.org (kenobi.freebsd.org
[IPv6:2001:1900:2254:206a::16:76])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(Client did not present a certificate)
by mx1.freebsd.org (Postfix) with ESMTPS id 5F397F01
for <freebsd-net@FreeBSD.org>; Thu, 13 Oct 2016 09:12:41 +0000 (UTC)
(envelope-from bugzilla-noreply@freebsd.org)
Received: from bugs.freebsd.org ([127.0.1.118])
by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u9D9CeYu001159
for <freebsd-net@FreeBSD.org>; Thu, 13 Oct 2016 09:12:41 GMT
(envelope-from bugzilla-noreply@freebsd.org)
From: bugzilla-noreply@freebsd.org
To: freebsd-net@FreeBSD.org
Subject: [Bug 148807] [panic] "panic: sbdrop" and "panic: sbsndptr: sockbuf _
and mbuf _ clashing" (8.1-RELEASE/10.1-STABLE/11-CURRENT)
Date: Thu, 13 Oct 2016 09:12:40 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 10.1-STABLE
X-Bugzilla-Keywords: crash, needs-qa, patch
X-Bugzilla-Severity: Affects Only Me
X-Bugzilla-Who: slw@zxy.spb.ru
X-Bugzilla-Status: Open
X-Bugzilla-Resolution:
X-Bugzilla-Priority: Normal
X-Bugzilla-Assigned-To: freebsd-net@FreeBSD.org
X-Bugzilla-Flags: mfc-stable9? mfc-stable10? mfc-stable11?
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-148807-2472-opEy2QEOgs@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-148807-2472@https.bugs.freebsd.org/bugzilla/>
References: <bug-148807-2472@https.bugs.freebsd.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-net>,
<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-net>,
<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 13 Oct 2016 09:12:41 -0000
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D148807
slw@zxy.spb.ru changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |slw@zxy.spb.ru
--- Comment #33 from slw@zxy.spb.ru ---
(In reply to Hiren Panchasara from comment #31)
> Most interesting frames are these 2:
>=20
> #22 0xffffffff80a6c546 in ether_input (ifp=3D<optimized out>, m=3D0x0) at=
/d2/hiren/freebsd/sys/net/if_ethersubr.c:759
> #23 0xffffffff804e2b3c in igb_rx_input (rxr=3D<optimized out>, ifp=3D0xff=
fff80115614800, m=3D0xfffff8014eee7600,=20
> ptype=3D<optimized out>) at /d2/hiren/freebsd/sys/dev/e1000/if_igb.c:4=
957
>
> #23 has an mbuf while #22 has it null.
> Does this point to your hunch of
> "device-driver bugs involving modifications to the mbuf chain after submi=
tting the mbuf to the network stack (e.g., due to concurrency bugs in the d=
evice driver)" ?
This is just result of compiler optimisation and stack decoding.
Compiler use for m same register as passed at call time and do
while (m) {=20=20
mn =3D m->m_nextpkt;
[...]
m =3D mn;
}
as result m (as decoded argument) will be incorectly displayed.
Actualy this is just last loop iteration with last mbuf in chain.
--=20
You are receiving this mail because:
You are the assignee for the bug.=