diff options
| author | Eduard Zingerman <eddyz87@gmail.com> | 2025-09-18 19:18:41 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-09-19 09:27:23 -0700 |
| commit | ccf25a67c7e29cfa6815d193054789b45ef825ad (patch) | |
| tree | 9df851b84a8d166f3962fa619bc8d163a5f5a33b /include/linux | |
| parent | e41c237953b36cdd025b82996a74bfe39c509d20 (diff) | |
bpf: signal error if old liveness is more conservative than new
Unlike the new algorithm, register chain based liveness tracking is
fully path sensitive, and thus should be strictly more accurate.
Validate the new algorithm by signaling an error whenever it considers
a stack slot dead while the old algorithm considers it alive.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-8-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bpf_verifier.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h index 2e3bdd50e2ba..dec5da3a2e59 100644 --- a/include/linux/bpf_verifier.h +++ b/include/linux/bpf_verifier.h @@ -852,6 +852,7 @@ struct bpf_verifier_env { /* array of pointers to bpf_scc_info indexed by SCC id */ struct bpf_scc_info **scc_info; u32 scc_cnt; + bool internal_error; }; static inline struct bpf_func_info_aux *subprog_aux(struct bpf_verifier_env *env, int subprog) |