"Setting up fuzzers for a new library" doc is unclear #14
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What is |
What is name_of_a_fuzzer? Not mentioned anywhere else. |
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Thanks for the feedback! We'll be sure to address them in our documentation. To answer your first question, we require the config to allow sharing of dicts between different fuzzers in a library. You're right though, in that we may be able to default to picking up dicts with the same name as the fuzzer binary. Library directory refers to the directory where the config files are stored in the repo. name_of_a_fuzzer is just the name of the fuzzer you're building. |
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I made another pass on Dictionary/Corpus parts. Please let us know if it still not clear. |
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Looks good to me now. |
This was referenced Dec 8, 2016
Merged
mhlakhani
added a commit
to mhlakhani/oss-fuzz
that referenced
this issue
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 issue
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 <oliverchang@users.noreply.github.com> Co-authored-by: jonathanmetzman <31354670+jonathanmetzman@users.noreply.github.com>
eamonnmcmanus
pushed a commit
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that referenced
this issue
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 <oliverchang@users.noreply.github.com> Co-authored-by: jonathanmetzman <31354670+jonathanmetzman@users.noreply.github.com>
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https://github.com/google/oss-fuzz/blob/master/docs/new_library.md#dictionaries-and-custom-libfuzzer-options
If .dict files are picked up by ClusterFuzz and are assumed to be libFuzzer compatible dictionaries, why do they need to be specified in the config file? Are they picked up iff they are specified in the config? Will they be picked up if I don't specify them in the config?...
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