netdev - Re: [PATCH bpf v2 0/5] bpf, sockmap: fixes stress testing and regression

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Date:   Mon, 08 Nov 2021 11:16:16 +0100
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     John Fastabend <john.fastabend@...il.com>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, daniel@...earbox.net,
        joamaki@...il.com, xiyou.wangcong@...il.com
Subject: Re: [PATCH bpf v2 0/5] bpf, sockmap: fixes stress testing and
 regression

On Wed, Nov 03, 2021 at 09:47 PM CET, John Fastabend wrote:
> Attached are 5 patches that fix issues we found by either stress testing
> or updating our CI to LTS kernels.
>
> Thanks to Jussi for all the hard work tracking down issues and getting
> stress testing/CI running.
>
> First patch was suggested by Jakub to ensure sockets in CLOSE state
> were safe from helper side.
>
> Next two patches are issues discovered by Jussi after writing a stess
> testing tool.
>
> The last two fix an issue noticed while reviewing patches and xlated
> code paths also discovered by Jussi.
>
> v2: Add an initial patch to make sockmap helpers safe with CLOSE
>     sockets in sockmap
>     Added Jussi's tested-by line he tested the original patch series.
>
> John Fastabend (4):
>   bpf, sockmap: Use stricter sk state checks in sk_lookup_assign
>   bpf, sockmap: Remove unhash handler for BPF sockmap usage
>   bpf, sockmap: Fix race in ingress receive verdict with redirect to
>     self
>   bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and
>     colliding
>
> Jussi Maki (1):
>   bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg
>
>  include/linux/skmsg.h     | 12 ++++++++
>  include/net/strparser.h   | 20 +++++++++++-
>  net/core/filter.c         | 64 ++++++++++++++++++++++++++++++++++-----
>  net/core/sock_map.c       |  6 ----
>  net/ipv4/tcp_bpf.c        | 48 ++++++++++++++++++++++++++++-
>  net/strparser/strparser.c | 10 +-----
>  6 files changed, 135 insertions(+), 25 deletions(-)

For the series:

Reviewed-by: Jakub Sitnicki <jakub@...udflare.com>