diff options
| -rw-r--r-- | kernel/bpf/verifier.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 57632357dac5..df6a55c5be7c 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -4876,13 +4876,23 @@ static int check_helper_mem_access(struct bpf_verifier_env *env, int regno, return check_map_access(env, regno, reg->off, access_size, zero_size_allowed); case PTR_TO_MEM: + if (type_is_rdonly_mem(reg->type)) { + if (meta && meta->raw_mode) { + verbose(env, "R%d cannot write into %s\n", regno, + reg_type_str(env, reg->type)); + return -EACCES; + } + } return check_mem_region_access(env, regno, reg->off, access_size, reg->mem_size, zero_size_allowed); case PTR_TO_BUF: if (type_is_rdonly_mem(reg->type)) { - if (meta && meta->raw_mode) + if (meta && meta->raw_mode) { + verbose(env, "R%d cannot write into %s\n", regno, + reg_type_str(env, reg->type)); return -EACCES; + } max_access = &env->prog->aux->max_rdonly_access; } else { |