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Published 20 hours ago • verified publisher icon bnagy

Error: no crash detected

Open xxrz opened this issue 4 years ago • 4 comments

Hello, I would like to ask what does "Error: no crash detected" mean? Is it because the test cases generated by AFL cannot trigger bugs, or am I not using crashwalk correctly?

xxrz avatar Nov 10 '20 12:11 xxrz

You can test yourself if they trigger bugs, by triaging some of them manually in GDB.

Sandr0x00 avatar Nov 16 '20 22:11 Sandr0x00

I have the same error, did you have resolved that？

kimiwanano avatar Apr 21 '21 07:04 kimiwanano

[NB I haven’t looked at this for years, I am essentially out of infosec]

If the software isn’t broken, this error means that the case didn’t crash under repro. It may be that it’s intermittent or it might just not be a crash (long story, but can happen). Final possibility is that it doesn’t crash under a debugger, but does under AFL instrumentation.

The kinds of bugs this software can have to cause false negatives like this are limited, but not impossible. Most likely, though, it’s something else. :)

bnagy avatar Apr 21 '21 08:04 bnagy

Got it! Thanks!

kimiwanano avatar Apr 21 '21 09:04 kimiwanano