Re: [Tinycc-devel] Stack Exhaustion on TinyC "mob" Branch

[Michael Matz]

Hello,

On Sun, 7 Feb 2021, Zhuo Zhang wrote:

> Hi,
> I am writing to report a stack exhaustion on current TinyC ‘mob’ Branch, which 
> is triggered when compiling a crafted program (named pop_stack.c and attacked).
>
> + How to trigger the bug:
>         simple run “./tcc poc_stack.c"
>
> + Detailed information
>         system:  Ubuntu 18.04.5 LTS, x86-64
>         compiler (to compile tcc): gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
>         commit: fbef90a7039b994907db34fde50f6fa5e46ab535
>         md5 of poc_stack.c: 909242f11e5ce660e1d843de92dd798a
>
> Please let me known if there is anything I can help with. Thanks!

Fixed in mob; this was also a real bug.


Ciao,
Michael.