Re: [PATCH bpf v3 0/2] bpf: fix verification of indirect var-off stack access

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On Tue, 2023-12-05 at 14:32 -0500, Andrei Matei wrote:
> V2 to V3:
>   - simplify checks for max_off (don't call
>     check_stack_slot_within_bounds for it)
>   - append a commit to protect against overflow in the addition of the
>     register and the offset
> 
> V1 to V2:
>   - fix max_off calculation for access size = 0
> 
> Andrei Matei (2):
>   bpf: fix verification of indirect var-off stack access
>   bpf: guard stack limits against 32bit overflow
> 
>  kernel/bpf/verifier.c | 20 +++++++-------------
>  1 file changed, 7 insertions(+), 13 deletions(-)
> 

I think we also need a selftest, at-least for patch #1.





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