[lwip-devel] [patch #10333] Several improvements to fuzzing performance

[J. Neuschäfer]

Follow-up Comment #2, patch #10333 (project lwip):


> 0003: gives me this when starting:
> [-] Whoops, the target binary crashed suddenly, before receiving any input
>     from the fuzzer! Since it seems to be built with ASAN and you have a
>     restrictive memory limit configured, this is expected; please read
>     /usr/share/doc/afl/notes_for_asan.md for help. 

The issue here is described as in the error message: lwIP's fuzzing harness is
compiled with ASAN, which means it needs a lot of virtual address space
(terabytes on a 64-bit system), so it doesn't work under AFL's restrictive
memory limit. The solution (or workaround) is to launch afl-fuzz with "-m
none" (no memory limit) or a sufficiently large memory limit.


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