env,
regno, reg->off, access_size,
zero_size_allowed, ACCESS_HELPER, meta);
+ case PTR_TO_BTF_ID:
+ return check_ptr_to_btf_access(env, regs, regno, reg->off,
+ access_size, BPF_READ, -1);
case PTR_TO_CTX:
/* in case the function doesn't know how to access the context,
* (because we are in a program of type SYSCALL for example), we
PTR_TO_MEM,
PTR_TO_MEM | MEM_RINGBUF,
PTR_TO_BUF,
+ PTR_TO_BTF_ID | PTR_TRUSTED,
},
};
if (base_type(reg->type) != PTR_TO_BTF_ID)
return 0;
+ if (compatible == &mem_types) {
+ if (!(arg_type & MEM_RDONLY)) {
+ verbose(env,
+ "%s() may write into memory pointed by R%d type=%s\n",
+ func_id_name(meta->func_id),
+ regno, reg_type_str(env, reg->type));
+ return -EACCES;
+ }
+ return 0;
+ }
+
switch ((int)reg->type) {
case PTR_TO_BTF_ID:
case PTR_TO_BTF_ID | PTR_TRUSTED: