bpf/verifier: refactor checks for range computation

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Split range computation checks in its own function, isolating pessimitic
range set for dst_reg and failing return to a single point.

Signed-off-by: Cupertino Miranda <cupertino.miranda@oracle.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: David Faust <david.faust@oracle.com>
Cc: Jose Marchesi <jose.marchesi@oracle.com>
Cc: Elena Zannoni <elena.zannoni@oracle.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>

bpf/verifier: improve code after range computation recent changes.
Link: https://lore.kernel.org/r/20240506141849.185293-3-cupertino.miranda@oracle.com

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Cupertino Miranda 2024-05-06 15:18:45 +01:00 • committed by Alexei Starovoitov

parent d786957ebd

commit 0922c78f59

1 changed files with 45 additions and 64 deletions

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kernel/bpf/verifier.c

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