Add -M flag on 1st instance #17
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In permanent mode AFL leaves some processes behind: ocurrent#14 (comment) This is partly due to bun using proc#terminate (SIGKILL), but even with SIGTERM there are race conditions in AFL and some processes stay behind: https://groups.google.com/d/topic/afl-users/E37s4YDti7o This can observed by just doing a 'dune runtest' in bun itself, and then `ps -ef|grep short.exe` on a multicore machine. The permanent mode processes stop themselves with SIGSTOP and wait for their afl parent to unblock them, but their afl parent exits, so they stay around forever. Which wouldn't be a problem, except for afl-gotcpu which detect that these processes are around and refuses to start more fuzzing jobs. The processes' parent pid, gid and sid is unrelated to bun or the afl fuzzer processes (afl/forkserver does a setsid call), so we have no easy way of finding these processes. Use cgroups when available to kill child processes reliably: this allows us to easily find all the pids of (grand)children. Fixes ocurrent#14 Signed-off-by: Edwin Török <[email protected]>
https://aflplus.plus/ 2.68c requires the use of -M, it complains if I use -S without it: [!] WARNING: no -M main node found. You need to run one main instance! Signed-off-by: Edwin Török <[email protected]>
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The AFL docs say to do this, and according to ocurrent#17 it's required on AFL++.
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The AFL docs say to do this, and according to ocurrent#17 it's required on AFL++.
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The AFL docs say to do this, and according to ocurrent#17 it's required on AFL++. Co-authored-by: Edwin Török <[email protected]>
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The AFL docs say to do this, and according to ocurrent#17 it's required on AFL++. Co-authored-by: Edwin Török <[email protected]>
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The AFL docs say to do this, and according to ocurrent#17 it's required on AFL++. Co-authored-by: Edwin Török <[email protected]>
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AFL also says it needs Thanks! |
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CHANGES: - update to dune 2 (ocurrent/bun#18, by @talex5 and @edwintorok) - use `-M` for first worker (ocurrent/bun#17, by @edwintorok and @talex5) - move bun to https://github.com/ocurrent/bun (ocurrent/bun#20, by @talex5)
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https://aflplus.plus/ warns if you don't run one instance with -M when you use -S.
Commit on top of #16 due to conflicts.