diff options
Diffstat (limited to 'kernel/bpf/verifier.c')
| -rw-r--r-- | kernel/bpf/verifier.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 3c9e6d0d77d6..4caabfdc15aa 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -9290,9 +9290,12 @@ static int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog, ret = check_func_arg_reg_off(env, reg, regno, ARG_DONTCARE); if (ret < 0) return ret; - if (check_mem_reg(env, reg, regno, arg->mem_size)) return -EINVAL; + if (!(arg->arg_type & PTR_MAYBE_NULL) && (reg->type & PTR_MAYBE_NULL)) { + bpf_log(log, "arg#%d is expected to be non-NULL\n", i); + return -EINVAL; + } } else { bpf_log(log, "verifier bug: unrecognized arg#%d type %d\n", i, arg->arg_type); |