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add validation for struct field type (#4536)

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Zhenwei Jin 2025-08-11 15:07:15 +08:00 committed by GitHub
parent 0baff8001d
commit 2d05aece1a
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GPG Key ID: B5690EEEBB952194
4 changed files with 32 additions and 1 deletions
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9
core/iwasm/aot/aot_loader.c
View File

@ -1787,7 +1787,7 @@ load_types(const uint8 **p_buf, const uint8 *buf_end, AOTModule *module,
read_uint32(buf, buf_end, j);
#if WASM_ENABLE_AOT_VALIDATOR != 0
/* an equivalence type should be before the type it refers to */
if (j > i) {
if (j >= i) {
set_error_buf(error_buf, error_buf_size, "invalid type index");
goto fail;
}
@ -1964,6 +1964,13 @@ load_types(const uint8 **p_buf, const uint8 *buf_end, AOTModule *module,
read_uint8(buf, buf_end, struct_type->fields[j].field_flags);
read_uint8(buf, buf_end, field_type);
#if WASM_ENABLE_AOT_VALIDATOR != 0
if (!is_valid_field_type(field_type)) {
set_error_buf(error_buf, error_buf_size,
"invalid field type");
goto fail;
}
#endif
struct_type->fields[j].field_type = field_type;
struct_type->fields[j].field_size = field_size =
(uint8)wasm_reftype_size(field_type);

14
core/iwasm/common/wasm_loader_common.c
View File

@ -179,6 +179,20 @@ is_valid_func_type(const WASMFuncType *func_type)
return true;
}
bool
is_valid_packed_type(uint8 packed_type)
{
return packed_type == PACKED_TYPE_I8 || packed_type == PACKED_TYPE_I16;
}
bool
is_valid_field_type(uint8 field_type)
{
if (is_valid_value_type(field_type) || is_valid_packed_type(field_type))
return true;
return false;
}
/*
* Indices are represented as a u32.
*/

6
core/iwasm/common/wasm_loader_common.h
View File

@ -38,6 +38,12 @@ is_valid_value_type_for_interpreter(uint8 value_tpye);
bool
is_valid_func_type(const WASMFuncType *func_type);
bool
is_valid_packed_type(uint8 packed_type);
bool
is_valid_field_type(uint8 field_type);
bool
is_indices_overflow(uint32 import, uint32 other, char *error_buf,
uint32 error_buf_size);

4
core/iwasm/interpreter/wasm_loader.c
View File

@ -1961,6 +1961,10 @@ resolve_struct_type(const uint8 **p_buf, const uint8 *buf_end,
error_buf_size)) {
goto fail;
}
if (!is_valid_field_type(ref_type.ref_type)) {
set_error_buf(error_buf, error_buf_size, "invalid field type");
goto fail;
}
type->fields[i].field_type = ref_type.ref_type;
if (need_ref_type_map) {
type->ref_type_maps[j].index = i;