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[infra] fixed /src/build.sh script location #7

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merged 1 commit into from
Oct 6, 2016
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@mikea mikea commented Oct 6, 2016

Fixing the location of build.sh lets us get rid of ENTRYPOINT. Which opens possibility to implement different commands like:

docker run -ti expat compile
docker run -ti expat run <fuzzer_name> <input_data>

and keep the knowledge of build script location.

This is a breaking change.

@Dor1s @oliverchang

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Awesome, LG!

@mikea mikea merged commit e2ca7bc into master Oct 6, 2016
@mikea mikea deleted the fix_build_location branch October 6, 2016 23:45
This was referenced Dec 8, 2016
mhlakhani added a commit to mhlakhani/oss-fuzz that referenced this pull request Sep 25, 2019
The corresponding github issue has more detail on the problem.

This code is not in any meaningful state to be committed -- it contains a bunch of hacks I had to make to get the binary to build statically -- libunwind is linked in (via folly), and I had to make changes to include liblzma as well (which libunwind depends on) as well as fix some other unrelated cmake issues.

Reproduction instructions below.

First, build it with `python infra/helper.py build_fuzzers --sanitizer address proxygen`
Then, check the build (it will pass): `python infra/helper.py check_build proxygen`
Then, run the fuzzer: `python infra/helper.py run_fuzzer proxygen ProxygenHTTP1xFuzzer`

It will fail in about ~30 seconds with the below trace. If the fuzzer goes down another path, I've had it reproduce easily by pulling up the shell, running `base64 -d`, pushing that input to a file, and then running the fuzzer directly on that file.

```
terminating with uncaught exception of type folly::ConversionError: Non-digit character found: "OPY"
AddressSanitizer:DEADLYSIGNAL
=================================================================
==11==ERROR: AddressSanitizer: ABRT on unknown address 0x00000000000b (pc 0x7fc166eb7428 bp 0x000000000001 sp 0x7ffcff0a6c78 T0)
SCARINESS: 10 (signal)
    #0 0x7fc166eb7427 in gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35427)
    google#1 0x7fc166eb9029 in abort (/lib/x86_64-linux-gnu/libc.so.6+0x37029)
    google#2 0x9ab7fa in abort_message (/out/ProxygenHTTP1xFuzzer+0x9ab7fa)
    google#3 0x9b009d in demangling_terminate_handler() (/out/ProxygenHTTP1xFuzzer+0x9b009d)
    google#4 0x9ab282 in std::__terminate(void (*)()) (/out/ProxygenHTTP1xFuzzer+0x9ab282)
    google#5 0x9adebd in __cxxabiv1::call_terminate(bool, _Unwind_Exception*) (/out/ProxygenHTTP1xFuzzer+0x9adebd)
    google#6 0x9ade60 in __cxxabiv1::scan_eh_tab(__cxxabiv1::(anonymous namespace)::scan_results&, _Unwind_Action, bool, _Unwind_Exception*, _Unwind_Context*) (/out/ProxygenHTTP1xFuzzer+0x9ade60)
    google#7 0x9ad5c6 in __gxx_personality_v0 (/out/ProxygenHTTP1xFuzzer+0x9ad5c6)
    google#8 0x7fc16725c262 in _Unwind_RaiseException (/lib/x86_64-linux-gnu/libgcc_s.so.1+0x10262)
    google#9 0x9acfd6 in __cxa_throw (/out/ProxygenHTTP1xFuzzer+0x9acfd6)
    google#10 0x5cedab in void folly::throw_exception<folly::ConversionError>(folly::ConversionError&&) /src/proxygen/proxygen/_build/deps/include/folly/lang/Exception.h:36:3
    google#11 0x5eea03 in _ZZN5folly2toItEENSt3__19enable_ifIXntsr3std7is_sameINS_5RangeIPKcEET_EE5valueES7_E4typeES6_ENKUlNS_14ConversionCodeEE_clESA_ /src/proxygen/proxygen/_build/deps/include/folly/Conv.h:1581:26
    google#12 0x5eea03 in _ZN5folly15expected_detail30expected_detail_ExpectedHelper14ExpectedHelper12thenOrThrow_IRNS0_15ExpectedStorageINS_5RangeIPKcEENS_14ConversionCodeELNS0_11StorageTypeE1EEENS_6detail18CheckTrailingSpaceEZNS_2toItEENSt3__19enable_ifIXntsr3std7is_sameIS8_T_EE5valueESI_E4typeES8_EUlS9_E_NS_8ExpectedINS_4UnitES9_EEvLb0ELi0EEET2_OSI_OT0_OT1_ /src/proxygen/proxygen/_build/deps/include/folly/Expected.h:610:5
    google#13 0x5ed846 in _ZNR5folly8ExpectedINS_5RangeIPKcEENS_14ConversionCodeEE11thenOrThrowINS_6detail18CheckTrailingSpaceEZNS_2toItEENSt3__19enable_ifIXntsr3std7is_sameIS4_T_EE5valueESD_E4typeES4_EUlS5_E_EEDTclclsr3stdE7declvalISD_EEclL_ZNSB_7declvalIRS4_EEDTclsr3std3__1E9__declvalISD_ELi0EEEvEEEEOSD_OT0_ /src/proxygen/proxygen/_build/deps/include/folly/Expected.h:1226:16
    google#14 0x5ed846 in _ZN5folly2toItEENSt3__19enable_ifIXntsr3std7is_sameINS_5RangeIPKcEET_EE5valueES7_E4typeES6_ /src/proxygen/proxygen/_build/deps/include/folly/Conv.h:1579:8
    google#15 0x5ed445 in proxygen::ParseURL::parseAuthority() /src/proxygen/proxygen/lib/utils/ParseURL.cpp:155:15
    google#16 0x5ec5e9 in proxygen::ParseURL::parseNonFully() /src/proxygen/proxygen/lib/utils/ParseURL.cpp:140:8
    google#17 0x5ea87a in proxygen::ParseURL::parse() /src/proxygen/proxygen/lib/utils/ParseURL.cpp:96:5
    google#18 0x59a99c in proxygen::ParseURL::init(folly::Range<char const*>) /src/proxygen/proxygen/lib/utils/ParseURL.h:34:5
    google#19 0x58add1 in proxygen::ParseURL::ParseURL(folly::Range<char const*>) /src/proxygen/proxygen/lib/utils/ParseURL.h:28:5
    google#20 0x58add1 in proxygen::ParseURL proxygen::HTTPMessage::setURL<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&) /src/proxygen/proxygen/lib/http/HTTPMessage.h:202:14
    google#21 0x5795f0 in proxygen::HTTP1xCodec::onHeadersComplete(unsigned long) /src/proxygen/proxygen/lib/http/codec/HTTP1xCodec.cpp:976:31
    google#22 0x58e2a3 in proxygen::HTTP1xCodec::onHeadersCompleteCB(proxygen::http_parser*, char const*, unsigned long) /src/proxygen/proxygen/lib/http/codec/HTTP1xCodec.cpp:1315:19
    google#23 0x5f2222 in proxygen::http_parser_execute(proxygen::http_parser*, proxygen::http_parser_settings const*, char const*, unsigned long) /src/proxygen/proxygen/external/http_parser/http_parser_cpp.cpp:1868:17
    google#24 0x577783 in proxygen::HTTP1xCodec::onIngress(folly::IOBuf const&) /src/proxygen/proxygen/lib/http/codec/HTTP1xCodec.cpp:200:26
    google#25 0x55b728 in unsigned long proxygen::parse<proxygen::HTTP1xCodec>(proxygen::HTTP1xCodec*, unsigned char const*, unsigned int, int, std::__1::function<bool ()>) /src/proxygen/proxygen/lib/http/codec/test/TestUtils.h:57:23
    google#26 0x55a6ef in LLVMFuzzerTestOneInput /src/proxygen/proxygen/fuzzers/ProxygenHTTP1xFuzzer.cpp:23:3
    google#27 0x460771 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:554:15
    google#28 0x45fe95 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool*) /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:470:3
    google#29 0x462247 in fuzzer::Fuzzer::MutateAndTestOne() /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:696:19
    google#30 0x462fe5 in fuzzer::Fuzzer::Loop(std::Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocator<fuzzer::SizedFile> >&) /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:832:5
    google#31 0x450dd8 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:825:6
    google#32 0x47b442 in main /src/llvm/projects/compiler-rt/lib/fuzzer/FuzzerMain.cpp:19:10
    google#33 0x7fc166ea282f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    google#34 0x424468 in _start (/out/ProxygenHTTP1xFuzzer+0x424468)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: ABRT (/lib/x86_64-linux-gnu/libc.so.6+0x35427) in gsignal
==11==ABORTING
MS: 3 CrossOver-ChangeBit-EraseBytes-; base unit: 467e3fbf38770044dea566169b84c60cb269c89a
0x43,0x4f,0x50,0x59,0x20,0x43,0x3a,0x4f,0x50,0x59,0x2f,0x4f,0xff,0xa,0x43,0x4f,0x50,0x59,0x20,0x2f,0x4f,0xff,0xa,0x43,0x4f,0x50,0x59,0x20,0x2f,0x6f,0x20,0xff,0x50,0x59,0x0,0x43,0xcf,0x50,0x59,0xff,0x4f,0x50,0x33,
COPY C:OPY/O\xff\x0aCOPY /O\xff\x0aCOPY /o \xffPY\x00C\xcfPY\xffOP3
artifact_prefix='./'; Test unit written to ./crash-2cd12847d55ebf08ec2eaee4e814c52e545e7f92
Base64: Q09QWSBDOk9QWS9P/wpDT1BZIC9P/wpDT1BZIC9vIP9QWQBDz1BZ/09QMw==
```

This seems wrong to me since the code is inside a try/catch block: https://github.com/facebook/proxygen/blob/master/proxygen/lib/utils/ParseURL.cpp#L159-L164

I can confirm that the same input does not crash the fuzzer in the version being built on oss-fuzz trunk (and indeed it would have also reported this as a test-case by now given it's been running over a day)
jonathanmetzman added a commit that referenced this pull request Dec 6, 2022
cc @oliverchang @alan32liu after #9100 and #8448

After compiling locally, I can see that
`./SystemSan ./target_dns -dict=vuln.dict`
crashes in a few seconds with
```
===BUG DETECTED: Arbitrary domain name resolution===
===Domain resolved: .f.z===
===DNS request type: 0, class: 256===
==315== ERROR: libFuzzer: deadly signal
    #0 0x539131 in __sanitizer_print_stack_trace /src/llvm-project/compiler-rt/lib/asan/asan_stack.cpp:87:3
    #1 0x457c48 in fuzzer::PrintStackTrace() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerUtil.cpp:210:5
    #2 0x43c923 in fuzzer::Fuzzer::CrashCallback() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:233:3
    #3 0x7fa57940041f  (/lib/x86_64-linux-gnu/libpthread.so.0+0x1441f) (BuildId: 7b4536f41cdaa5888408e82d0836e33dcf436466)
    #4 0x7fa5793ff7db in send (/lib/x86_64-linux-gnu/libpthread.so.0+0x137db) (BuildId: 7b4536f41cdaa5888408e82d0836e33dcf436466)
    #5 0x503ba4 in __interceptor_send /src/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:6802:17
    #6 0x7fa578abf462  (/lib/x86_64-linux-gnu/libresolv.so.2+0xb462) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    #7 0x7fa578abbc43 in __res_context_query (/lib/x86_64-linux-gnu/libresolv.so.2+0x7c43) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    #8 0x7fa578abc8ed in __res_context_search (/lib/x86_64-linux-gnu/libresolv.so.2+0x88ed) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    #9 0x7fa578ad2cc1  (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2cc1) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    #10 0x7fa578ad2e8b in _nss_dns_gethostbyname3_r (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2e8b) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    #11 0x7fa578ad2f41 in _nss_dns_gethostbyname2_r (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2f41) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    #12 0x7fa5792fdc9d in gethostbyname2_r (/lib/x86_64-linux-gnu/libc.so.6+0x130c9d) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    #13 0x7fa5792d179e  (/lib/x86_64-linux-gnu/libc.so.6+0x10479e) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    #14 0x7fa5792d2f58 in getaddrinfo (/lib/x86_64-linux-gnu/libc.so.6+0x105f58) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    #15 0x4d93ac in getaddrinfo /src/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:2667:13
    #16 0x56c8d9 in LLVMFuzzerTestOneInput /out/SystemSan/target_dns.cpp:35:11
    #17 0x43dec3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:611:15
    #18 0x43d6aa in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool, bool*) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:514:3
    #19 0x43ed79 in fuzzer::Fuzzer::MutateAndTestOne() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:757:19
    #20 0x43fa45 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, std::__Fuzzer::allocator<fuzzer::SizedFile> >&) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:895:5
    #21 0x42edaf in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:912:6
    #22 0x458402 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
    #23 0x7fa5791f1082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    #24 0x41f7ed in _start (/out/SystemSan/target_dns+0x41f7ed)

NOTE: libFuzzer has rudimentary signal handlers.
      Combine libFuzzer with AddressSanitizer or similar for better crash reports.
SUMMARY: libFuzzer: deadly signal
MS: 2 CrossOver-ManualDict- DE: "f.z"-; base unit: ac3478d69a3c81fa62e60f5c3696165a4e5e6ac4
0x66,0x2e,0x7a,
f.z
artifact_prefix='./'; Test unit written to ./crash-926813b2d6adde373f96a10594a5314951588384
Base64: Zi56
```

You can also try
```
echo -n f.z > toto
./SystemSan ./target_dns toto  
```

Co-authored-by: Oliver Chang <[email protected]>
Co-authored-by: jonathanmetzman <[email protected]>
eamonnmcmanus pushed a commit to eamonnmcmanus/oss-fuzz that referenced this pull request Mar 15, 2023
cc @oliverchang @alan32liu after google#9100 and google#8448

After compiling locally, I can see that
`./SystemSan ./target_dns -dict=vuln.dict`
crashes in a few seconds with
```
===BUG DETECTED: Arbitrary domain name resolution===
===Domain resolved: .f.z===
===DNS request type: 0, class: 256===
==315== ERROR: libFuzzer: deadly signal
    #0 0x539131 in __sanitizer_print_stack_trace /src/llvm-project/compiler-rt/lib/asan/asan_stack.cpp:87:3
    google#1 0x457c48 in fuzzer::PrintStackTrace() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerUtil.cpp:210:5
    google#2 0x43c923 in fuzzer::Fuzzer::CrashCallback() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:233:3
    google#3 0x7fa57940041f  (/lib/x86_64-linux-gnu/libpthread.so.0+0x1441f) (BuildId: 7b4536f41cdaa5888408e82d0836e33dcf436466)
    google#4 0x7fa5793ff7db in send (/lib/x86_64-linux-gnu/libpthread.so.0+0x137db) (BuildId: 7b4536f41cdaa5888408e82d0836e33dcf436466)
    google#5 0x503ba4 in __interceptor_send /src/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:6802:17
    google#6 0x7fa578abf462  (/lib/x86_64-linux-gnu/libresolv.so.2+0xb462) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    google#7 0x7fa578abbc43 in __res_context_query (/lib/x86_64-linux-gnu/libresolv.so.2+0x7c43) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    google#8 0x7fa578abc8ed in __res_context_search (/lib/x86_64-linux-gnu/libresolv.so.2+0x88ed) (BuildId: 4519041bde5b859c55798ac0745b0b6199cb7d94)
    google#9 0x7fa578ad2cc1  (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2cc1) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    google#10 0x7fa578ad2e8b in _nss_dns_gethostbyname3_r (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2e8b) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    google#11 0x7fa578ad2f41 in _nss_dns_gethostbyname2_r (/lib/x86_64-linux-gnu/libnss_dns.so.2+0x2f41) (BuildId: 3fac4ec397ba8e8938fe298f103113f315465130)
    google#12 0x7fa5792fdc9d in gethostbyname2_r (/lib/x86_64-linux-gnu/libc.so.6+0x130c9d) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    google#13 0x7fa5792d179e  (/lib/x86_64-linux-gnu/libc.so.6+0x10479e) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    google#14 0x7fa5792d2f58 in getaddrinfo (/lib/x86_64-linux-gnu/libc.so.6+0x105f58) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    google#15 0x4d93ac in getaddrinfo /src/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:2667:13
    google#16 0x56c8d9 in LLVMFuzzerTestOneInput /out/SystemSan/target_dns.cpp:35:11
    google#17 0x43dec3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:611:15
    google#18 0x43d6aa in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool, bool*) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:514:3
    google#19 0x43ed79 in fuzzer::Fuzzer::MutateAndTestOne() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:757:19
    google#20 0x43fa45 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, std::__Fuzzer::allocator<fuzzer::SizedFile> >&) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:895:5
    google#21 0x42edaf in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:912:6
    google#22 0x458402 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
    google#23 0x7fa5791f1082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    google#24 0x41f7ed in _start (/out/SystemSan/target_dns+0x41f7ed)

NOTE: libFuzzer has rudimentary signal handlers.
      Combine libFuzzer with AddressSanitizer or similar for better crash reports.
SUMMARY: libFuzzer: deadly signal
MS: 2 CrossOver-ManualDict- DE: "f.z"-; base unit: ac3478d69a3c81fa62e60f5c3696165a4e5e6ac4
0x66,0x2e,0x7a,
f.z
artifact_prefix='./'; Test unit written to ./crash-926813b2d6adde373f96a10594a5314951588384
Base64: Zi56
```

You can also try
```
echo -n f.z > toto
./SystemSan ./target_dns toto  
```

Co-authored-by: Oliver Chang <[email protected]>
Co-authored-by: jonathanmetzman <[email protected]>
DavidKorczynski pushed a commit that referenced this pull request Apr 5, 2023
We've still got an issue with crashes on the urllib3 requests test that
uses the mock HTTP server.

Fix #9958 to handle port mapping errors didn't resolve it.

I got a feeling there's an ordering issue. Looking at the error logs
[https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56500#c2](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56500#c2)
there appears to be an issue where we're throwing exceptions before the
coverage completes.

```
=== Uncaught Python exception: ===
--
  | MaxRetryError: HTTPConnectionPool(host='localhost', port=8011): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4cdf33d1f0>: Failed to establish a new connection: [Errno 101] Network is unreachable'))
  | Traceback (most recent call last):
  | File "fuzz_requests.py", line 109, in TestOneInput
  | File "urllib3/_request_methods.py", line 118, in request
  | File "urllib3/_request_methods.py", line 217, in request_encode_body
  | File "urllib3/poolmanager.py", line 433, in urlopen
  | File "urllib3/connectionpool.py", line 874, in urlopen
  | File "urllib3/connectionpool.py", line 874, in urlopen
  | File "urllib3/connectionpool.py", line 874, in urlopen
  | File "urllib3/connectionpool.py", line 844, in urlopen
  | File "urllib3/util/retry.py", line 505, in increment
  | MaxRetryError: HTTPConnectionPool(host='localhost', port=8011): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4cdf33d1f0>: Failed to establish a new connection: [Errno 101] Network is unreachable'))
  |  
  | INFO: Instrumenting 3854 functions...
  | INFO: Instrumentation complete.
  | ==10674== ERROR: libFuzzer: fuzz target exited
  | #0 0x7f4ce0bac694 in __sanitizer_print_stack_trace /src/llvm-project/compiler-rt/lib/ubsan/ubsan_diag_standalone.cpp:31:3
  | #1 0x7f4ce0b2df48 in fuzzer::PrintStackTrace() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerUtil.cpp:210:5
  | #2 0x7f4ce0b12cdc in fuzzer::Fuzzer::ExitCallback() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:250:3
  | #3 0x7f4ce09068a6 in __run_exit_handlers /build/glibc-SzIz7B/glibc-2.31/stdlib/exit.c:108:8
  | #4 0x7f4ce0906a5f in exit /build/glibc-SzIz7B/glibc-2.31/stdlib/exit.c:139:3
  | #5 0x7f4ce03b2c78 in libpython3.8.so.1.0
  | #6 0x7f4ce03b76cf in libpython3.8.so.1.0
  | #7 0x403ad2 in fuzz_requests.pkg
  | #8 0x403e67 in fuzz_requests.pkg
  | #9 0x7f4ce08e4082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/libc-start.c:308:16
  | #10 0x40249d in fuzz_requests.pkg
  |  
  | SUMMARY: libFuzzer: fuzz target exited
```

This is an attempted fix inspired by the requests
[fuzz_server.py](https://github.com/google/oss-fuzz/blob/master/projects/requests/fuzz_server.py)
where the lifecycle of the test thread is managed within the server.
Since the web server is created at the start of `TestOneInput` I don't
expect there to be any timing issues or thread initialisation issues.
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3 participants