netdev - [bpf PATCH 0/3] Fix sock

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Date:   Tue, 28 Jul 2020 08:43:28 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     john.fastabend@...il.com, kafai@...com, daniel@...earbox.net,
        ast@...nel.org
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [bpf PATCH 0/3] Fix sock_ops field read splat 

Doing some refactoring resulted in a code splat when reading sock_ops
fields.

Patch 1, has the details and proposed fix.

Patch 2, gives a reproducer and test to verify the fix. I used the
netcnt program to test this because I wanted a splat to be generated
which can only be done if we have real traffic exercising the code.

Patch 3, is an optional patch. While doing above I wanted to also verify
loads were OK. The code looked good, but I wanted some xlated code to
review as well. It seems like a good idea to add it here or at least
shouldn't hurt. I could push it into bpf-next if folks want.

---

John Fastabend (3):
      bpf: sock_ops ctx access may stomp registers in corner case
      bpf, selftests: Add tests for ctx access in sock_ops with single register
      bpf, selftests: Add tests for sock_ops load with r9,r8.r7 registers

 net/core/filter.c                                  |   26 ++++++++++++++++++--
 .../testing/selftests/bpf/progs/test_tcpbpf_kern.c |   20 +++++++++++++++
 2 files changed, 44 insertions(+), 2 deletions(-)

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