diff options
Diffstat (limited to 'kernel/bpf/verifier.c')
| -rw-r--r-- | kernel/bpf/verifier.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 9f81818f294..055ae6ac028 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -763,7 +763,7 @@ static int check_func_arg(struct verifier_env *env, u32 regno, enum bpf_reg_type expected_type; int err = 0; - if (arg_type == ARG_ANYTHING) + if (arg_type == ARG_DONTCARE) return 0; if (reg->type == NOT_INIT) { @@ -771,6 +771,9 @@ static int check_func_arg(struct verifier_env *env, u32 regno, return -EACCES; } + if (arg_type == ARG_ANYTHING) + return 0; + if (arg_type == ARG_PTR_TO_STACK || arg_type == ARG_PTR_TO_MAP_KEY || arg_type == ARG_PTR_TO_MAP_VALUE) { expected_type = PTR_TO_STACK; @@ -1324,7 +1327,8 @@ peek_stack: /* tell verifier to check for equivalent states * after every call and jump */ - env->explored_states[t + 1] = STATE_LIST_MARK; + if (t + 1 < insn_cnt) + env->explored_states[t + 1] = STATE_LIST_MARK; } else { /* conditional jump with two edges */ ret = push_insn(t, t + 1, FALLTHROUGH, env); |