From: Eric Dumazet <eric.dumazet@gmail.com>
To: Dave Jones <davej@redhat.com>
Cc: netdev@vger.kernel.org,
Fedora Kernel Team <kernel-team@fedoraproject.org>
Subject: Re: WARNING: at net/ipv4/tcp.c:1598 tcp_recvmsg+0x641/0xd30()
Date: Mon, 20 Aug 2012 18:42:52 +0200 [thread overview]
Message-ID: <1345480972.5158.330.camel@edumazet-glaptop> (raw)
In-Reply-To: <20120820162050.GA25593@redhat.com>
On Mon, 2012-08-20 at 12:20 -0400, Dave Jones wrote:
> On Fri, Aug 10, 2012 at 10:40:18PM +0200, Eric Dumazet wrote:
>
> > > > > backtrace:
> > > > > :WARNING: at net/ipv4/tcp.c:1598 tcp_recvmsg+0x641/0xd30()
> > >
> > > We're getting more reports of this happening too.
> >
> > Might be a driver issue with LRO / GRO/ TCP coalescing
> >
> > So we need a _lot_ of details.
>
> I looked over all the existing reports of this. It's a bit of a mess.
> It seems to affect multiple drivers.
> A big problem is that the network stack seems to get in a really screwed up state
> when this happens, and the automated bug filer files these corrupted traces.
>
> A secondary problem is that because these are automated reports, not all users
> are responsive to answer questions afterwards...
>
> Anyway, what I've gathered so far..
>
> 3.4-rc i2400m_usb https://bugzilla.redhat.com/show_bug.cgi?id=807114
>
> unknown (mangled traces) https://bugzilla.redhat.com/show_bug.cgi?id=841016
>
> possibly e1000e (also mangled) https://bugzilla.redhat.com/show_bug.cgi?id=841769
>
> 3.4.4 unknown (mangled) https://bugzilla.redhat.com/show_bug.cgi?id=849275
> (same guy, probably e1000e) https://bugzilla.redhat.com/show_bug.cgi?id=849276
>
> 3.5.0 r8712u https://bugzilla.redhat.com/show_bug.cgi?id=845853
>
> 3.5.0 unknown https://bugzilla.redhat.com/show_bug.cgi?id=846991
>
>
> any ideas on any additional debug printk's we could add ?
>
> Dave
>
We had a generic bug in old kernels, so you might ignore too old
reports.
This was fixed in commit 1ca7ee30630e1022dbcf1b51be20580815ffab73
(tcp: take care of overlaps in tcp_try_coalesce())
prev parent reply other threads:[~2012-08-20 16:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-06 15:46 WARNING: at net/ipv4/tcp.c:1598 tcp_recvmsg+0x641/0xd30() Dave Jones
2012-08-10 20:29 ` Dave Jones
2012-08-10 20:40 ` Eric Dumazet
2012-08-20 16:20 ` Dave Jones
2012-08-20 16:42 ` Eric Dumazet [this message]
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