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wasm_instantiate: Fix a potential integer overflow issue (#2459)

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Fixes: https://github.com/bytecodealliance/wasm-micro-runtime/issues/2450
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YAMAMOTO Takashi 2023-08-14 18:27:14 +09:00 committed by GitHub
parent 8d1cf46f02
commit e360b7a919
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1 changed files with 4 additions and 3 deletions
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7
core/iwasm/interpreter/wasm_runtime.c
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@ -1839,7 +1839,7 @@ wasm_instantiate(WASMModule *module, WASMModuleInstance *parent,
for (i = 0; i < module->data_seg_count; i++) {
WASMMemoryInstance *memory = NULL;
uint8 *memory_data = NULL;
uint32 memory_size = 0;
uint64 memory_size = 0;
WASMDataSeg *data_seg = module->data_segments[i];
#if WASM_ENABLE_BULK_MEMORY != 0
@ -1852,7 +1852,8 @@ wasm_instantiate(WASMModule *module, WASMModuleInstance *parent,
bh_assert(memory);
memory_data = memory->memory_data;
memory_size = memory->num_bytes_per_page * memory->cur_page_count;
memory_size =
(uint64)memory->num_bytes_per_page * memory->cur_page_count;
bh_assert(memory_data || memory_size == 0);
bh_assert(data_seg->base_offset.init_expr_type
@ -1898,7 +1899,7 @@ wasm_instantiate(WASMModule *module, WASMModuleInstance *parent,
/* check offset + length(could be zero) */
length = data_seg->data_length;
if (base_offset + length > memory_size) {
if ((uint64)base_offset + length > memory_size) {
LOG_DEBUG("base_offset(%d) + length(%d) > memory_size(%d)",
base_offset, length, memory_size);
#if WASM_ENABLE_REF_TYPES != 0