How to fuzz a application written by myself?

[jiak94]

I replace the heater.c with the program I wrote, but it seems like it does not work. I read your blog but didn't find any tutorial on that? Could you give me some hint? Any help will be appreciated.

[timnewsham]

The problem is that the heater isnt being invoked currently. Look in the rootTemplate/init script and notice that the heater is commented out. You can uncomment it if you include a heater and test cases in your root template. You can also replace it with any sort of heating program you want to execute.

[jiak94]

Thanks for your reply. According to your post, I pack the heater, and inputs to my root template by uncomment the cp heater "$name/bin/heater and add cp -r inputs "$name" in makeRoot script. Then I modified the rootTemplate/init by adding /bin/heater inputs/*. It seems like the argument is not changed during the fuzzing. I use runTest to test the testcases generated by the fuzzer, no matter which testcase was feed, the argument for heater is always "inputs/*"

[timnewsham]

It sounds like inputs/* doesnt expand to anything in your case. Try fixing the path to something like /etc/inputs/* if you have your heater files in "/etc/inputs". Also make sure your rootfs gets regenerated from the template (you might have to remove your old one to force it to be regenerated).