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

[Kelsey Skunberg]

Don't have access to 5.8.0-48 and 5.4.0-70 yet as the tags still need to
be pushed. Could you help with this please? 

I can come back and finish reviewing once I can also apply/test. Thank
you! 

-Kelsey

On 2021-03-23 17:28:23 , Thadeu Lima de Souza Cascardo wrote:
> BugLink: https://bugs.launchpad.net/bugs/1920995
> 
> [Impact]
> bpf selftests will fail after applying fixes from 5.8.0-48 and 5.4.0-70.
> 
> [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 +++++++++------
>  .../selftests/bpf/verifier/bounds_deduction.c | 27 +++++++++++++------
>  tools/testing/selftests/bpf/verifier/unpriv.c | 15 ++++++++++-
>  .../selftests/bpf/verifier/value_ptr_arith.c  | 23 +++++++++++++++-
>  4 files changed, 68 insertions(+), 18 deletions(-)
> 
> -- 
> 2.27.0
> 
> 
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