lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 30 Jun 2020 22:52:52 -0700
From:   Cong Wang <>
To:     wenxu <>
Cc:     Paul Blakey <>,
        Linux Kernel Network Developers <>
Subject: Re: [PATCH net] net/sched: act_mirred: fix fragment the packet after
 defrag in act_ct

On Tue, Jun 30, 2020 at 7:36 PM wenxu <> wrote:
> On 7/1/2020 3:02 AM, Cong Wang wrote:
> > On Mon, Jun 29, 2020 at 7:55 PM <> wrote:
> >> From: wenxu <>
> >>
> >> The fragment packets do defrag in act_ct module. The reassembled packet
> >> over the mtu in the act_mirred. This big packet should be fragmented
> >> to send out.
> > This is too brief. Why act_mirred should handle the burden introduced by
> > act_ct? And why is this 158-line change targeting -net not -net-next?
> Hi Cong,
> In the act_ct the fragment packets will defrag to a big packet and do conntrack things.
> But in the latter filter mirred action, the big packet normally send over the mtu of outgoing device.
> So in the act_mirred send the packet should fragment.

Why act_mirred? Not, for a quick example, a new action called act_defrag?
I understand you happen to use the combination of act_ct and act_mirred,
but that is not the reason we should make act_mirred specifically work
for your case.

> I think this is a bugfix in the net branch the act_ct handle with fragment will always fail.

act_mirred is just to mirror or redirect packets, if they are too big
to deliver,
it is not act_mirred's fault.

And more importantly, why don't you put all these important information in
your changelog?


Powered by blists - more mailing lists