bpf: don't (ab)use instructions to store state

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Storing state in reserved fields of instructions makes
it impossible to run verifier on programs already
marked as read-only. Allocate and use an array of
per-instruction state instead.

While touching the error path rename and move existing
jump target.

Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jakub Kicinski 2016-09-21 11:43:56 +01:00 • committed by David S. Miller

parent eadb41489f

commit 3df126f35f

1 changed files with 40 additions and 30 deletions

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kernel/bpf/verifier.c

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