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[Tinycc-devel] WARNING: TinyCC segmentation faults


From: Jacek Wielemborek
Subject: [Tinycc-devel] WARNING: TinyCC segmentation faults
Date: Wed, 2 Sep 2015 18:10:20 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0

Hi,

I ran afl-fuzz against tcc and found an example of a 9-byte file that
crashes the compiler:

address@hidden:~/o/crashes# hexdump -C
id\:000000\,sig\:11\,src\:000000\,op\:arith8\,pos\:1\,val\:-6
00000000  6d 5b 69 6e 28 29 7b 7d  0a                       |m[in(){}.|
00000009

There are also other crashes - if anybody is still hacking on TCC, I can
forward you the test cases and/or instruct on how to fuzz the program.

Cheers,
d33tah



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