build_fuzzers action fails on syzkaller project

[a-nogikh]

Hello,

A few days ago our oss-fuzz pre-submit action began to fail 100% of the time with the following error:

2023-09-20T12:46:41.2697493Z + compile_go_fuzzer github.com/google/syzkaller/pkg/compiler Fuzz compiler_fuzzer
2023-09-20T12:46:41.2735973Z /usr/local/bin/compile_go_fuzzer: line 28: cd: /root/go/src/github.com/google/syzkaller/pkg/compiler: No such file or directory
2023-09-20T12:46:41.5369177Z github.com/google/syzkaller/pkg/compiler
2023-09-20T12:46:41.5882163Z github.com/google/syzkaller/pkg/compiler
2023-09-20T12:46:41.5892912Z Running go-fuzz -tags gofuzz -func Fuzz -o compiler_fuzzer.a github.com/google/syzkaller/pkg/compiler
2023-09-20T12:46:56.0962104Z + compile_go_fuzzer github.com/google/syzkaller/prog/test FuzzDeserialize prog_deserialize_fuzzer
2023-09-20T12:46:56.0987333Z /usr/local/bin/compile_go_fuzzer: line 28: cd: /root/go/src/github.com/google/syzkaller/prog/test: No such file or directory
2023-09-20T12:46:56.3639258Z github.com/google/syzkaller/prog/test
2023-09-20T12:46:56.4159026Z github.com/google/syzkaller/prog/test
2023-09-20T12:46:56.4171622Z Running go-fuzz -tags gofuzz -func FuzzDeserialize -o prog_deserialize_fuzzer.a github.com/google/syzkaller/prog/test
2023-09-20T12:46:58.0466767Z + compile_go_fuzzer github.com/google/syzkaller/prog/test FuzzParseLog prog_parselog_fuzzer
2023-09-20T12:46:58.0493963Z /usr/local/bin/compile_go_fuzzer: line 28: cd: /root/go/src/github.com/google/syzkaller/prog/test: No such file or directory
2023-09-20T12:46:58.3455892Z github.com/google/syzkaller/prog/test
2023-09-20T12:46:58.4104276Z github.com/google/syzkaller/prog/test
2023-09-20T12:46:58.4119080Z Running go-fuzz -tags gofuzz -func FuzzParseLog -o prog_parselog_fuzzer.a github.com/google/syzkaller/prog/test
2023-09-20T12:46:59.9486701Z + compile_go_fuzzer github.com/google/syzkaller/pkg/report Fuzz report_fuzzer
2023-09-20T12:46:59.9516840Z /usr/local/bin/compile_go_fuzzer: line 28: cd: /root/go/src/github.com/google/syzkaller/pkg/report: No such file or directory
2023-09-20T12:47:00.4717192Z github.com/google/syzkaller/pkg/report
2023-09-20T12:47:00.7119005Z github.com/google/syzkaller/pkg/report
2023-09-20T12:47:00.7139327Z Running go-fuzz -tags gofuzz -func Fuzz -o report_fuzzer.a github.com/google/syzkaller/pkg/report
2023-09-20T12:48:45.0215442Z /usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value: 0x25
2023-09-20T12:48:45.0217091Z report_fuzzer.a(000021.o): in function `_cgo_9c8efe9babca_C2func_res_search':
2023-09-20T12:48:45.0329186Z cgo_unix_cgo_res.cgo2.c:(.text+0x32): undefined reference to `__res_search'
2023-09-20T12:48:45.0330054Z /usr/bin/ld: report_fuzzer.a(000021.o): in function `_cgo_9c8efe9babca_Cfunc_res_search':
2023-09-20T12:48:45.0330556Z cgo_unix_cgo_res.cgo2.c:(.text+0x81): undefined reference to `__res_search'
2023-09-20T12:48:45.8122842Z clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
2023-09-20T12:48:48.8019821Z 2023-09-20 12:48:48,801 - root - ERROR - Building fuzzers failed.
2023-09-20T12:48:48.8024317Z 2023-09-20 12:48:48,801 - root - ERROR - Error building fuzzers for (commit: 348a0f03bc7330f7a92f18573557f6a67b41c757, pr_ref: refs/pull/4217/merge).

There have been no recent changes on our side that could have caused any such compilation errors. Could you please give some pointers where to look for the actual problem?

Here's the workflow config that we use: https://github.com/google/syzkaller/blob/master/.github/workflows/oss-fuzz.yml

Cc @dvyukov

[jonathanmetzman]

The timing makes me think it's related to 6efce3b any ideas @catenacyber ? I may have to revert if I can't figure it out.

[catenacyber]

Looks like export CXX="${CXX} -lresolv" is not applied...

[catenacyber]

Looks like export CXX="${CXX} -lresolv" is not applied...

Because the language was not explicitly set to golang as your PR does ;-)

[jonathanmetzman]

Yeah I meant to tell you I figured it out