Comments (4)
I had this issue until I used -m 10000
My run command was afl-fuzz -i input -o output -m 10000 -t 5000 dotnet bin/Debug/net6.0/fuzztest.dll
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I run this command with (-m 10000) and it doesn't help: afl-fuzz -i in -o out -m 10000 -t 5000 dotnet bin/Debug/netcoreapp2.2/FuzzTest.dll
afl-fuzz 2.52b by [email protected]
[+] You have 8 CPU cores and 2 runnable tasks (utilization: 25%).
[+] Try parallel jobs - see /usr/local/share/doc/afl/parallel_fuzzing.txt.
[] Checking CPU core loadout...
[+] Found a free CPU core, binding to #0.
[] Checking core_pattern...
[] Checking CPU scaling governor...
[] Setting up output directories...
[] Scanning 'in'...
[+] No auto-generated dictionary tokens to reuse.
[] Creating hard links for all input files...
[] Validating target binary...
[] Attempting dry run with 'id:000000,orig:1.json'...
[*] Spinning up the fork server...
[-] Hmm, looks like the target binary terminated before we could complete a
handshake with the injected code. There are two probable explanations:
- The current memory limit (9.77 GB) is too restrictive, causing an OOM
fault in the dynamic linker. This can be fixed with the -m option. A
simple way to confirm the diagnosis may be:
( ulimit -Sv $[9999 << 10]; /path/to/fuzzed_app )
Tip: you can use http://jwilk.net/software/recidivm to quickly
estimate the required amount of virtual memory for the binary.
- Less likely, there is a horrible bug in the fuzzer. If other options
fail, poke <[email protected]> for troubleshooting tips.
[-] PROGRAM ABORT : Fork server handshake failed
Location : init_forkserver(), afl-fuzz.c:2253
What is wrong?
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Nevermind, figured it out. Apparently I didn't have .Net Core installed in my WSL environment...
apt install dotnet-sdk-3.1
I was getting tripped up because I'm coding/compiling in Visual Studio but running everything in WSL.
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I'm also experiencing this issue, not sure what the problem is...
Win10x64 (Debian WSL)
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