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

From: Michael Matz
Subject: Re: [Tinycc-devel] Stack Exhaustion on TinyC "mob" Branch
Date: Sat, 13 Feb 2021 03:33:58 +0100 (CET)
User-agent: Alpine 2.21 (LSU 202 2017-01-01)


On Sun, 7 Feb 2021, Zhuo Zhang wrote:

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.


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