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Add more buffer boundary checks in wasm loader (#2734)

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And fix exception not printed in `iwasm --repl` mode and resize the memory
data size to UINT32_MAX if the initial page number is 65536.
This commit is contained in:
Wenyong Huang 2023-11-09 08:42:05 +08:00 committed by GitHub
parent cc23c7ee7d
commit 7f8292ffd1
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 22 additions and 1 deletions
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6
core/iwasm/aot/aot_runtime.c
View File

@ -489,6 +489,12 @@ memory_instantiate(AOTModuleInstance *module_inst, AOTModuleInstance *parent,
if (max_page_count > DEFAULT_MAX_PAGES)
max_page_count = DEFAULT_MAX_PAGES;
}
else { /* heap_size == 0 */
if (init_page_count == DEFAULT_MAX_PAGES) {
num_bytes_per_page = UINT32_MAX;
init_page_count = max_page_count = 1;
}
}
LOG_VERBOSE("Memory instantiate:");
LOG_VERBOSE(" page bytes: %u, init pages: %u, max pages: %u",

5
core/iwasm/interpreter/wasm_loader.c
View File

@ -173,7 +173,6 @@ fail:
#define read_uint8(p) TEMPLATE_READ_VALUE(uint8, p)
#define read_uint32(p) TEMPLATE_READ_VALUE(uint32, p)
#define read_bool(p) TEMPLATE_READ_VALUE(bool, p)
#define read_leb_int64(p, p_end, res) \
do { \
@ -490,6 +489,7 @@ load_init_expr(const uint8 **p_buf, const uint8 *buf_end,
if (type != VALUE_TYPE_V128)
goto fail_type_mismatch;
CHECK_BUF(p, p_end, 1);
flag = read_uint8(p);
(void)flag;
@ -7138,6 +7138,7 @@ re_scan:
BlockType block_type;
p_org = p - 1;
CHECK_BUF(p, p_end, 1);
value_type = read_uint8(p);
if (is_byte_a_type(value_type)) {
/* If the first byte is one of these special values:
@ -9099,6 +9100,7 @@ re_scan:
{
uint32 opcode1;
CHECK_BUF(p, p_end, 1);
opcode1 = read_uint8(p);
/* follow the order of enum WASMSimdEXTOpcode in wasm_opcode.h
*/
@ -9760,6 +9762,7 @@ re_scan:
{
uint32 opcode1;
CHECK_BUF(p, p_end, 1);
opcode1 = read_uint8(p);
#if WASM_ENABLE_FAST_INTERP != 0
emit_byte(loader_ctx, opcode1);

6
core/iwasm/interpreter/wasm_runtime.c
View File

@ -276,6 +276,12 @@ memory_instantiate(WASMModuleInstance *module_inst, WASMModuleInstance *parent,
if (max_page_count > DEFAULT_MAX_PAGES)
max_page_count = DEFAULT_MAX_PAGES;
}
else { /* heap_size == 0 */
if (init_page_count == DEFAULT_MAX_PAGES) {
num_bytes_per_page = UINT32_MAX;
init_page_count = max_page_count = 1;
}
}
LOG_VERBOSE("Memory instantiate:");
LOG_VERBOSE(" page bytes: %u, init pages: %u, max pages: %u",

3
product-mini/platforms/posix/main.c
View File

@ -207,8 +207,11 @@ app_instance_repl(wasm_module_inst_t module_inst)
break;
}
if (app_argc != 0) {
const char *exception;
wasm_application_execute_func(module_inst, app_argv[0],
app_argc - 1, app_argv + 1);
if ((exception = wasm_runtime_get_exception(module_inst)))
printf("%s\n", exception);
}
free(app_argv);
}

3
product-mini/platforms/windows/main.c
View File

@ -161,8 +161,11 @@ app_instance_repl(wasm_module_inst_t module_inst)
break;
}
if (app_argc != 0) {
const char *exception;
wasm_application_execute_func(module_inst, app_argv[0],
app_argc - 1, app_argv + 1);
if ((exception = wasm_runtime_get_exception(module_inst)))
printf("%s\n", exception);
}
free(app_argv);
}