bpf: factor out fetching bpf_map from FD and adding it to used_maps list

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Factor out the logic to extract bpf_map instances from FD embedded in
bpf_insns, adding it to the list of used_maps (unless it's already
there, in which case we just reuse map's index). This simplifies the
logic in resolve_pseudo_ldimm64(), especially around `struct fd`
handling, as all that is now neatly contained in the helper and doesn't
leak into a dozen error handling paths.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

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Andrii Nakryiko 2024-08-06 14:31:34 -07:00

parent 51a1ca933f

commit 535ead44ff

1 changed files with 66 additions and 49 deletions

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kernel/bpf/verifier.c

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