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From: "Richard W.M. Jones" <rjones@redhat.com>
To: sbrivio@redhat.com
Cc: passt-dev@passt.top
Subject: Re: [PATCH passt v2 0/7] Add fuzzing
Date: Thu, 17 Nov 2022 19:06:12 +0000	[thread overview]
Message-ID: <20221117190612.GB30956@redhat.com> (raw)
In-Reply-To: <20221117184938.2270462-1-rjones@redhat.com>


I forgot to mention that I didn't sort out test cases yet.  The
current test case (single zero length packet) is not ideal.

We might have a single test case, say a single TCP SYN packet.

However if there are distinct areas of functionality in passt (eg. TCP
connect, ARP, DNS, DHCP, ...), *and* if those are geometrically very
far apart in the search space, then you could argue for having one
test case per major feature.  Capturing that into tap files will be a
fun afternoon for someone.

More on this topic here:
https://aflplus.plus/docs/fuzzing_in_depth/#2-preparing-the-fuzzing-campaign

- - -

Also ...  while we do have --fd functionality, even better would be to
modify passt so it can read input from stdin and drop output.  See:
https://aflplus.plus/docs/best_practices/#fuzzing-a-network-service
The socketpair / --fd approach is a bit cleaner.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top


  parent reply	other threads:[~2022-11-17 19:06 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-17 18:49 [PATCH passt v2 0/7] Add fuzzing Richard W.M. Jones
2022-11-17 18:49 ` [PATCH passt v2 1/7] build: Force-create pasta symlink Richard W.M. Jones
2022-11-18  1:30   ` David Gibson
2022-11-18  7:56     ` Stefano Brivio
2022-11-17 18:49 ` [PATCH passt v2 2/7] build: Remove *~ files with make clean Richard W.M. Jones
2022-11-18  1:31   ` David Gibson
2022-11-17 18:49 ` [PATCH passt v2 3/7] passt, tap: Add --fd option Richard W.M. Jones
2022-11-17 18:49 ` [PATCH passt v2 4/7] passt, tap: Process data on the socket before HUP/ERR events Richard W.M. Jones
2022-11-18  1:32   ` David Gibson
2022-11-17 18:49 ` [PATCH passt v2 5/7] XXX build: Add extra syscalls needed by AFL instrumentation Richard W.M. Jones
2022-11-17 18:49 ` [PATCH passt v2 6/7] XXX passt: Kill seccomp and other isolation mechanisms Richard W.M. Jones
2022-11-17 18:49 ` [PATCH passt v2 7/7] Import fuzzing wrapper from libnbd Richard W.M. Jones
2022-11-17 19:06 ` Richard W.M. Jones [this message]
2022-11-18 10:12 ` [PATCH passt v2 0/7] Add fuzzing Richard W.M. Jones
2022-11-25  9:23 ` Stefano Brivio
2022-11-25 10:11   ` Richard W.M. Jones
2022-11-29 13:34     ` Stefano Brivio
2022-11-29 13:44       ` Richard W.M. Jones
2022-11-30  1:11       ` David Gibson

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