Every time program aborts after performing a dry run

[Arpita Dutta]

Hi All,

I am getting this weird behavior of AFL for some of the programs and am unable to understand the reason.

Every time I run the programs and get the same message of perform_dry_run() and the program aborts.

Test case 'id:000000,orig:test1.txt' does *NOT* crash

         Location : perform_dry_run(), afl-fuzz.c:2558

Please check the attached screenshot as well.

Any leads to resolve this issue?

Thanks in advance.

[Michal Zalewski]

I'm assuming you're passing the -C parameter in the command line. This puts the fuzzer in a "crash exploration" mode, where it's expecting some already-known crashing inputs as the starting point.

If you want to fuzz the binary the usual way, just omit the -C parameter. If you eventually discover some cool crashing case and you want to examine how much control you have over the circumstances ot the crash, that's where -C comes in handy.

You should also really follow that core_pattern advice earlier in the screenshot. Without that change, you will end up missing crashes.

/mz

--
You received this message because you are subscribed to the Google Groups "afl-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to afl-users+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/afl-users/a0d889be-20f7-47a6-9689-5a6d5bd1b977n%40googlegroups.com.

[Arpita Dutta]

Thanks Michal.

It solved the problem.

Thanks a lot for the help.

Regards,

Arpita