[wasm] Only use the table maximum in allocation if it is non-zero.

src/wasm/module-decoder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/wasm/module-decoder.h"
 
 #include "src/base/functional.h"
 #include "src/base/platform/platform.h"
 #include "src/flags.h"
 #include "src/macro-assembler.h"
@@ skipping 13 matching lines @@
   } while (false)
 #else
 #define TRACE(...)
 #endif
 
 namespace {
 
 const char* kNameString = "name";
 const size_t kNameStringLength = 4;
 
+static const uint32_t kMaxTableSize = 1 << 28;
+
 LocalType TypeOf(const WasmModule* module, const WasmInitExpr& expr) {
   switch (expr.kind) {
     case WasmInitExpr::kNone:
       return kAstStmt;
     case WasmInitExpr::kGlobalIndex:
       return expr.val.global_index < module->globals.size()
                  ? module->globals[expr.val.global_index].type
                  : kAstStmt;
     case WasmInitExpr::kI32Const:
       return kAstI32;
@@ skipping 262 matching lines @@
             break;
           }
           case kExternalTable: {
             // ===== Imported table ==========================================
             import->index =
                 static_cast<uint32_t>(module->function_tables.size());
             module->function_tables.push_back(
                 {0, 0, std::vector<int32_t>(), true, false, SignatureMap()});
             expect_u8("element type", 0x20);
             WasmIndirectFunctionTable* table = &module->function_tables.back();
-            consume_resizable_limits("element count", "elements", kMaxUInt32,
+            consume_resizable_limits("element count", "elements", kMaxTableSize,
                                      &table->size, &table->max_size);
             break;
           }
           case kExternalMemory: {
             // ===== Imported memory =========================================
             consume_resizable_limits(
                 "memory", "pages", WasmModule::kMaxLegalPages,
                 &module->min_mem_pages, &module->max_mem_pages);
             break;
           }
@@ skipping 883 matching lines @@
     table.push_back(std::move(func_asm_offsets));
   }
   if (decoder.more()) decoder.error("unexpected additional bytes");
 
   return decoder.toResult(std::move(table));
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8