Re: [PATCH v6 0/7] net/eth: Fix stack-buffer-overflow in _eth_get_rss_ex_dst_addr()

[Miroslav Rezanina <mrezanin@redhat.com>]

----- Original Message -----
> From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
> To: qemu-devel@nongnu.org
> Cc: "Jason Wang" <jasowang@redhat.com>, "Stefano Garzarella" <sgarzare@redhat.com>, "Thomas Huth" <thuth@redhat.com>,
> "Miroslav Rezanina" <mrezanin@redhat.com>, "Dmitry Fleytman" <dmitry.fleytman@gmail.com>, "Paolo Bonzini"
> <pbonzini@redhat.com>, "Laurent Vivier" <lvivier@redhat.com>, "Philippe Mathieu-Daudé" <philmd@redhat.com>
> Sent: Wednesday, March 10, 2021 7:31:16 PM
> Subject: [PATCH v6 0/7] net/eth: Fix stack-buffer-overflow in _eth_get_rss_ex_dst_addr()
> 
> I had a look at the patch from Miroslav trying to silence a
> compiler warning which in fact is a nasty bug. Here is a fix.
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg772735.html
>

Reviewed-by: Miroslav Rezanina <mrezanin@redhat.com>
 
> Since v5:
> - addressed Stefano's review comments:
> - add now patch fixing in6_address offset
> 
> Since v4:
> - reworked again, tested it with Fedora Raw Hide
> 
> Philippe Mathieu-Daudé (7):
>   net/eth: Use correct in6_address offset in _eth_get_rss_ex_dst_addr()
>   net/eth: Simplify _eth_get_rss_ex_dst_addr()
>   net/eth: Better describe _eth_get_rss_ex_dst_addr's offset argument
>   net/eth: Check size earlier in _eth_get_rss_ex_dst_addr()
>   net/eth: Check iovec has enough data earlier
>   net/eth: Read ip6_ext_hdr_routing buffer before accessing it
>   net/eth: Add an assert() and invert if() statement to simplify code
> 
>  net/eth.c                      | 46 ++++++++++++++---------------
>  tests/qtest/fuzz-e1000e-test.c | 53 ++++++++++++++++++++++++++++++++++
>  MAINTAINERS                    |  1 +
>  tests/qtest/meson.build        |  1 +
>  4 files changed, 78 insertions(+), 23 deletions(-)
>  create mode 100644 tests/qtest/fuzz-e1000e-test.c
> 
> --
> 2.26.2
> 
> 
> 

-- 
Miroslav Rezanina
Software Engineer - Virtualization Team Maintainer