diff options
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/verifier.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index d690c7dd1f1a..477b6932c3c1 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -4203,6 +4203,22 @@ static int fixup_bpf_calls(struct bpf_verifier_env *env) continue; } + if (insn->imm == BPF_FUNC_redirect_map) { + u64 addr = (unsigned long)prog; + struct bpf_insn r4_ld[] = { + BPF_LD_IMM64(BPF_REG_4, addr), + *insn, + }; + cnt = ARRAY_SIZE(r4_ld); + + new_prog = bpf_patch_insn_data(env, i + delta, r4_ld, cnt); + if (!new_prog) + return -ENOMEM; + + delta += cnt - 1; + env->prog = prog = new_prog; + insn = new_prog->insnsi + i + delta; + } patch_call_imm: fn = prog->aux->ops->get_func_proto(insn->imm); /* all functions that have prototype and verifier allowed |