Reproduce SIGSEGV in Buffer::New(size_t)

dummy.cc

#include <v8.h>
#include <node.h>
#include <alloca.h>
#include <node_buffer.h>

using namespace v8;
using namespace node;

static Handle<Value> dummy(const Arguments& args) {
  HandleScope scope;
  size_t size = args[0]->ToUint32()->IntegerValue();
  char *p = (char *) alloca(size); *p = 0; // claim stack, touch so it doesn't get optimized away
  Buffer *b = Buffer::New(size);
  return b->handle_;
}

extern "C" void init(Handle<Object> target) {
  HandleScope scope;
  target->Set(String::NewSymbol("dummy"), FunctionTemplate::New(dummy)->GetFunction());
}

test.js

require('./dummy').dummy(512 * 1024);	// ok
require('./dummy').dummy(1024 * 1024);	// dies with SIGSEGV