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This change prepares strobemeta for update in callbacks verification
logic. To allow bpf_loop() verification converge when multiple
callback iterations are considered:
- track offset inside strobemeta_payload->payload directly as scalar
value;
- at each iteration make sure that remaining
strobemeta_payload->payload capacity is sufficient for execution of
read_{map,str}_var functions;
- make sure that offset is tracked as unbound scalar between
iterations, otherwise verifier won't be able infer that bpf_loop
callback reaches identical states.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20231121020701.26440-3-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
87eb0152bc