[Libguestfs] [PATCH nbdkit v2 0/2] Implement fuzzing using Clang's libFuzzer.

[Richard W.M. Jones]

On Mon, Nov 04, 2019 at 09:31:09PM +0000, Richard W.M. Jones wrote:
> v1 was here:
> https://www.redhat.com/archives/libguestfs/2019-November/msg00003.html
> 
> This version depends on:
> https://www.redhat.com/archives/libguestfs/2019-November/msg00004.html
> and this series:
> https://www.redhat.com/archives/libguestfs/2019-November/msg00009.html
> 
> The delta has been reduced slightly because of changes made possible
> by cleaning up and fixing the quit path in nbdkit.  It's still a
> fairly ugly and invasive patch however, so suggestions sought about
> how to make it better.

I forgot to add a few points:

* It still leaks memory slowly.  I ran the v1 version overnight and it
  leaked about 1 GB.  Be good to find out eventually what is leaking.

* This patch might be further simplified if there was a configure
  option to link a particular plugin into nbdkit statically, eg:

  ./configure --enable-static-plugin=memory

  which is sort of a useful feature on its own.

* I think the --log=null patch is a reasonable feature on its own.

* We didn't find any crashes yet.  However enabling ASAN finds
  problems in both libnbd & nbdkit which I didn't investigate yet
  (they are difficult to reproduce).

Rich.

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