netdev - [PATCH bpf v3 0/9] bpf fix to prevent oob under speculation

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Message-Id: <20190102235835.3311-1-daniel@iogearbox.net>
Date:   Thu,  3 Jan 2019 00:58:26 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     ast@...nel.org
Cc:     jannh@...gle.com, davem@...emloft.net,
        jakub.kicinski@...ronome.com, netdev@...r.kernel.org,
        Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH bpf v3 0/9] bpf fix to prevent oob under speculation

This set fixes an out of bounds case under speculative execution
by implementing masking of pointer alu into the verifier. For
details please see the individual patches.

Thanks!

v2 -> v3:
  - 8/9: change states_equal condition into old->speculative &&
    !cur->speculative, thanks Jakub!
  - 8/9: remove incorrect speculative state test in
    propagate_liveness(), thanks Jakub!
v1 -> v2:
  - Typo fixes in commit msg and a comment, thanks David!

Daniel Borkmann (9):
  bpf: move {prev_,}insn_idx into verifier env
  bpf: move tmp variable into ax register in interpreter
  bpf: enable access to ax register also from verifier rewrite
  bpf: restrict map value pointer arithmetic for unprivileged
  bpf: restrict stack pointer arithmetic for unprivileged
  bpf: restrict unknown scalars of mixed signed bounds for unprivileged
  bpf: fix check_map_access smin_value test when pointer contains offset
  bpf: prevent out of bounds speculation on pointer arithmetic
  bpf: add various test cases to selftests

 include/linux/bpf_verifier.h                |   12 +
 include/linux/filter.h                      |   10 +-
 kernel/bpf/core.c                           |   54 +-
 kernel/bpf/verifier.c                       |  336 ++++++--
 tools/testing/selftests/bpf/test_verifier.c | 1146 ++++++++++++++++++++++++++-
 5 files changed, 1451 insertions(+), 107 deletions(-)

-- 
2.9.5