netdev - [PATCH v2 net-next 0/5] bpf: verifier fixes

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Message-ID: <f9208b68-466e-c6cb-4d0c-c567e40bdc15@solarflare.com>
Date:   Wed, 23 Aug 2017 15:07:20 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <davem@...emloft.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>
CC:     <netdev@...r.kernel.org>,
        iovisor-dev <iovisor-dev@...ts.iovisor.org>
Subject: [PATCH v2 net-next 0/5] bpf: verifier fixes

Fix a couple of bugs introduced in my recent verifier patches.
Patch #2 does slightly increase the insn count on bpf_lxc.o, but only by
 about a hundred insns (i.e. 0.2%).

v2: added test for write-marks bug (patch #1); reworded comment on
 propagate_liveness() for clarity.

Alexei Starovoitov (1):
  selftests/bpf: add a test for a pruning bug in the verifier

Edward Cree (4):
  selftests/bpf: add a test for a bug in liveness-based pruning
  bpf/verifier: when pruning a branch, ignore its write marks
  bpf/verifier: remove varlen_map_value_access flag
  bpf/verifier: document liveness analysis

 include/linux/bpf_verifier.h                | 14 +++++-
 kernel/bpf/verifier.c                       | 78 +++++++++++++++++------------
 tools/testing/selftests/bpf/test_verifier.c | 44 ++++++++++++++++
 3 files changed, 103 insertions(+), 33 deletions(-)