[tor-relays] Tor fuzzying with AFL - issues with virt mem

[Toralf Förster]

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I do fuzz test the Tor sources with AFL using the script in [1]. Today I was faced with the afl message : 

- - The current memory limit (47.7 TB) is too restrictive, causing the
...

Therefore I re-run this:

torproject at mr-fox ~ $ cd ~; for i  in ./tor/src/test/fuzz/fuzz-*; do echo $(./recidivm-0.1.1/recidivm -v $i 2>&1 | tail -n 1) $i ;  done | sort -n
140647294041983 ./tor/src/test/fuzz/fuzz-hsdescv2
210556434775808 ./tor/src/test/fuzz/fuzz-descriptor
211071855558638 ./tor/src/test/fuzz/fuzz-microdesc
230618232257983 ./tor/src/test/fuzz/fuzz-consensus
272676600806400 ./tor/src/test/fuzz/fuzz-http
275960232411072 ./tor/src/test/fuzz/fuzz-diff-apply
280371168541696 ./tor/src/test/fuzz/fuzz-vrs
281200098803455 ./tor/src/test/fuzz/fuzz-iptsv2
281298748667644 ./tor/src/test/fuzz/fuzz-extrainfo
281456722575360 ./tor/src/test/fuzz/fuzz-diff

and was wondering about the bug numbers - a previous run few weeks ago gave me the numbers as seen in [1]:

# 40880663 ./tor/src/test/fuzz/fuzz-iptsv2
# 40880757 ./tor/src/test/fuzz/fuzz-consensus
# 40880890 ./tor/src/test/fuzz/fuzz-extrainfo
# 40885159 ./tor/src/test/fuzz/fuzz-hsdescv2
# 40885224 ./tor/src/test/fuzz/fuzz-http
# 40888156 ./tor/src/test/fuzz/fuzz-descriptor
# 40897371 ./tor/src/test/fuzz/fuzz-microdesc
# 40955570 ./tor/src/test/fuzz/fuzz-vrs

Now I do wonder, if the new linux kernel, a new AFL (changed from 2.39b to 2.46b recently) or what else is causing this issue ?


[1] https://github.com/toralf/torutils/blob/master/fuzz.sh

- -- 
Toralf
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