go-ethereum

History

Martin Holst Swende 81678971db trie, tests/fuzzers: implement a stacktrie fuzzer + stacktrie fixes (#21799 ) * trie: fix error in stacktrie not committing small roots * fuzzers: make trie-fuzzer use correct returnvalues * trie: improved tests * tests/fuzzers: fuzzer for stacktrie vs regular trie * test/fuzzers: make stacktrie fuzzer use 32-byte keys * trie: fix error in stacktrie with small nodes * trie: add (skipped) testcase for stacktrie * tests/fuzzers: address review comments for stacktrie fuzzer * trie: fix docs in stacktrie		2020-11-09 15:08:12 +01:00
..
abi	accounts/abi: ABI explicit difference between Unpack and UnpackIntoInterface (#21091 )	2020-09-28 14:10:26 +02:00
keystore	tests/fuzzers: fuzzbuzz fuzzers for keystore, rlp, trie, whisper (#19910 )	2019-12-10 11:57:37 +02:00
rlp	tests/fuzzers: fuzzbuzz fuzzers for keystore, rlp, trie, whisper (#19910 )	2019-12-10 11:57:37 +02:00
stacktrie	trie, tests/fuzzers: implement a stacktrie fuzzer + stacktrie fixes (#21799 )	2020-11-09 15:08:12 +01:00
trie	trie, tests/fuzzers: implement a stacktrie fuzzer + stacktrie fixes (#21799 )	2020-11-09 15:08:12 +01:00
txfetcher	eth: rework tx fetcher to use O(1) ops + manage network requests	2020-02-13 15:27:15 +02:00
README.md	all: fix typos in comments (#21118 )	2020-05-25 10:21:28 +02:00

README.md

Fuzzers

To run a fuzzer locally, you need go-fuzz installed.

First build a fuzzing-binary out of the selected package:

(cd ./rlp && CGO_ENABLED=0 go-fuzz-build .)

That command should generate a rlp-fuzz.zip in the rlp/ directory. If you are already in that directory, you can do

[user@work rlp]$ go-fuzz
2019/11/26 13:36:54 workers: 6, corpus: 3 (3s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 0, uptime: 3s
2019/11/26 13:36:57 workers: 6, corpus: 3 (6s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 1054, uptime: 6s
2019/11/26 13:37:00 workers: 6, corpus: 3 (9s ago), crashers: 0, restarts: 1/8358, execs: 25074 (2786/sec), cover: 1054, uptime: 9s
2019/11/26 13:37:03 workers: 6, corpus: 3 (12s ago), crashers: 0, restarts: 1/8497, execs: 50986 (4249/sec), cover: 1054, uptime: 12s
2019/11/26 13:37:06 workers: 6, corpus: 3 (15s ago), crashers: 0, restarts: 1/9330, execs: 74640 (4976/sec), cover: 1054, uptime: 15s
2019/11/26 13:37:09 workers: 6, corpus: 3 (18s ago), crashers: 0, restarts: 1/9948, execs: 99482 (5527/sec), cover: 1054, uptime: 18s
2019/11/26 13:37:12 workers: 6, corpus: 3 (21s ago), crashers: 0, restarts: 1/9428, execs: 122568 (5836/sec), cover: 1054, uptime: 21s
2019/11/26 13:37:15 workers: 6, corpus: 3 (24s ago), crashers: 0, restarts: 1/9676, execs: 145152 (6048/sec), cover: 1054, uptime: 24s
2019/11/26 13:37:18 workers: 6, corpus: 3 (27s ago), crashers: 0, restarts: 1/9855, execs: 167538 (6205/sec), cover: 1054, uptime: 27s
2019/11/26 13:37:21 workers: 6, corpus: 3 (30s ago), crashers: 0, restarts: 1/9645, execs: 192901 (6430/sec), cover: 1054, uptime: 30s
2019/11/26 13:37:24 workers: 6, corpus: 3 (33s ago), crashers: 0, restarts: 1/9967, execs: 219294 (6645/sec), cover: 1054, uptime: 33s

Otherwise:

go-fuzz -bin ./rlp/rlp-fuzz.zip

Notes

Once a 'crasher' is found, the fuzzer tries to avoid reporting the same vector twice, so stores the fault in the suppressions folder. Thus, if you e.g. make changes to fix a bug, you should remove all data from the suppressions-folder, to verify that the issue is indeed resolved.

Also, if you have only one and the same exit-point for multiple different types of test, the suppression can make the fuzzer hide different types of errors. So make sure that each type of failure is unique (for an example, see the rlp fuzzer, where a counter i is used to differentiate between failures:

		if !bytes.Equal(input, output) {
			panic(fmt.Sprintf("case %d: encode-decode is not equal, \ninput : %x\noutput: %x", i, input, output))
		}