bpf: Factor out program return value calculation

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Factor the return value range calculation logic in check_return_code
out of the function in preparation for separating the return value
validation logic for BPF_EXIT and bpf_throw().

No functional changes. The change made in return_retval_code's handling
of PROG_TRACING program types (not error'ing on the default case) is a
no-op because the match on the program attach type is exhaustive.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260228184759.108145-2-emil@etsalapatis.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Emil Tsalapatis 2026-02-28 13:47:55 -05:00 • committed by Alexei Starovoitov

parent 7242b0951d

commit 83419c8fdb

2 changed files with 126 additions and 101 deletions

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1

include/linux/bpf_verifier.h

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226

kernel/bpf/verifier.c

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