From: Avi Kivity <avi@redhat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Felipe W Damasio <felipewd@gmail.com>,
David Miller <davem@davemloft.net>,
Patrick McHardy <kaber@trash.net>,
linux-kernel@vger.kernel.org, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] tproxy: nf_tproxy_assign_sock() can handle tw sockets
Date: Sun, 11 Jul 2010 08:19:21 +0300 [thread overview]
Message-ID: <4C395459.6080407@redhat.com> (raw)
In-Reply-To: <1278742649.2538.17.camel@edumazet-laptop>
On 07/10/2010 09:17 AM, Eric Dumazet wrote:
>
> Strange thing with your crash report is CR2 value, with unexpected value
> of 000000000b388000 while RAX value is dce8dce85d415d41
>
> Faulting instruction is :
>
> 48 83 b8 b0 00 00 00 00 cmpq $0x0,0xb0(%rax)
>
> So I would have expected CR2 being RAX+0xb0, but its not.
>
Nothing strange about it. You only get page faults and valid cr2 for
canonical addresses (17 high order bits all equal). In this case
rax+0xb0 is not a canonical address, so you got a general protection
fault instead, with cr2 unchanged.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2010-07-11 5:19 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTimn8A0cYZmwNZYitRkBHKKFe4HQ5GU626DLugkk@mail.gmail.com>
2010-07-08 22:06 ` Squid hang up on 2.6.34 Eric Dumazet
[not found] ` <AANLkTil49m6Ul2bauiH4Pwn-6ykrYTFmSO6_SxqQgD_e@mail.gmail.com>
2010-07-08 22:08 ` Eric Dumazet
2010-07-09 15:03 ` Felipe W Damasio
2010-07-09 16:03 ` Felipe W Damasio
2010-07-09 17:13 ` [PATCH] tproxy: nf_tproxy_assign_sock() can handle tw sockets Eric Dumazet
2010-07-09 17:53 ` David Miller
2010-07-09 18:16 ` Felipe W Damasio
2010-07-10 3:18 ` Felipe W Damasio
2010-07-10 6:17 ` Eric Dumazet
2010-07-10 19:30 ` David Miller
2010-07-11 3:11 ` Felipe W Damasio
2010-07-11 7:11 ` Felipe W Damasio
2010-07-11 7:13 ` Felipe W Damasio
2010-07-11 8:36 ` Eric Dumazet
2010-07-11 5:19 ` Avi Kivity [this message]
2010-07-11 8:02 ` Eric Dumazet
2010-07-12 0:52 ` Felipe W Damasio
2010-07-12 18:49 ` Felipe W Damasio
2010-07-13 14:24 ` Felipe W Damasio
2010-07-13 14:40 ` Eric Dumazet
2010-07-13 14:49 ` Felipe W Damasio
2010-07-13 15:49 ` Eric Dumazet
2010-07-13 20:55 ` Felipe W Damasio
2010-07-13 21:06 ` Felipe W Damasio
2010-07-14 3:21 ` Eric Dumazet
2010-07-14 3:27 ` Felipe W Damasio
2010-07-14 3:43 ` Eric Dumazet
2010-07-14 3:51 ` Felipe W Damasio
2010-07-14 6:56 ` Bill Fink
2010-07-16 15:41 ` Felipe W Damasio
2010-07-16 15:52 ` Eric Dumazet
2010-07-14 11:41 ` Patrick McHardy
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