From: Andi Kleen <ak@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: ak@suse.de, alan@lxorguk.ukuu.org.uk, willy@debian.org,
thunder7@xs4all.nl, parisc-linux@lists.parisc-linux.org,
linux-kernel@vger.kernel.org
Subject: Re: [parisc-linux] documented Oops running big-endian reiserfs on parisc architecture
Date: Mon, 3 Sep 2001 10:41:05 +0200 [thread overview]
Message-ID: <20010903104105.A3398@gruyere.muc.suse.de> (raw)
In-Reply-To: <20010903002514.X5126@parcelfarce.linux.theplanet.co.uk.suse.lists.linux.kernel> <E15dghq-0000bZ-00@the-village.bc.nu.suse.lists.linux.kernel> <oup66b0zq9j.fsf@pigdrop.muc.suse.de> <20010903.011530.62340995.davem@redhat.com>
In-Reply-To: <20010903.011530.62340995.davem@redhat.com>; from davem@redhat.com on Mon, Sep 03, 2001 at 01:15:30AM -0700
On Mon, Sep 03, 2001 at 01:15:30AM -0700, David S. Miller wrote:
> From: Andi Kleen <ak@suse.de>
> Date: 03 Sep 2001 09:29:12 +0200
>
> And also everybody connected to the internet needs them, because you can
> create arbitarily unaligned TCP/UDP/ICMP headers using IP option byte sized
> NOPs.
>
> IP header length is measured in octets, so how is this possible?
> :-)
Sorry that came out wrong. You can in theory generate unaligned IP options this way, but the
kernel handles this correctly using memcpy. What it doesn't handle is unaligned TCP options
(e.g. timestamps); which you can create using TCP option byte fillers.
Also the 4 byte alignment of the header doesn't help much when the driver didn't cooperate.
-Andi
next prev parent reply other threads:[~2001-09-03 8:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20010903002514.X5126@parcelfarce.linux.theplanet.co.uk.suse.lists.linux.kernel>
[not found] ` <E15dghq-0000bZ-00@the-village.bc.nu.suse.lists.linux.kernel>
2001-09-03 7:29 ` Andi Kleen
2001-09-03 8:15 ` David S. Miller
2001-09-03 8:41 ` Andi Kleen [this message]
2001-09-03 10:48 ` Hans Reiser
2001-09-03 14:31 ` Matthew Wilcox
2001-09-03 15:44 ` Horst von Brand
2001-09-02 8:55 thunder7
2001-09-02 14:00 ` [parisc-linux] " Matthew Wilcox
2001-09-02 23:04 ` David S. Miller
2001-09-02 23:25 ` Matthew Wilcox
2001-09-02 23:31 ` Alan Cox
2001-09-02 23:26 ` David S. Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010903104105.A3398@gruyere.muc.suse.de \
--to=ak@suse.de \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=davem@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=parisc-linux@lists.parisc-linux.org \
--cc=thunder7@xs4all.nl \
--cc=willy@debian.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®