bpf: fix visit_insn()'s detection of BPF_FUNC_timer_set_callback helper

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It's not correct to assume that any BPF_CALL instruction is a helper
call. Fix visit_insn()'s detection of bpf_timer_set_callback() helper by
also checking insn->code == 0. For kfuncs insn->code would be set to
BPF_PSEUDO_KFUNC_CALL, and for subprog calls it will be BPF_PSEUDO_CALL.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230302235015.2044271-8-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Andrii Nakryiko 2023-03-02 15:50:05 -08:00 • committed by Alexei Starovoitov

parent 653ae3a874

commit c1ee85a980

1 changed files with 1 additions and 1 deletions

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kernel/bpf/verifier.c

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