[SRU Bionic 0/3] (LP: #1920995) selftests: bpf verifier fails after sanitize_ptr_alu fixes

[Thadeu Lima de Souza Cascardo]

BugLink: https://bugs.launchpad.net/bugs/1920995

[Impact]
bpf selftests will fail after applying fixes from 4.15.0-140.

[Fix]
Apply selftests fixes and bpf verifier simplification and hardening.

[Test Plan]
Ran the verifier test and other tests for the latest BPF fixes.

[Potential regression]
BPF programs that worked before may stop working or, worse, programs that
should not be allowed may start working.

Piotr Krysiuk (3):
  bpf: Simplify alu_limit masking for pointer arithmetic
  bpf: Add sanity check for upper ptr_limit
  bpf, selftests: Fix up some test_verifier cases for unprivileged

 kernel/bpf/verifier.c                       | 21 ++++++++++------
 tools/testing/selftests/bpf/test_verifier.c | 27 +++++++++++++++------
 2 files changed, 32 insertions(+), 16 deletions(-)

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2.27.0