cmd/go: (on s390x with gcc-15) ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240)

[tianon]

Go version

go version go1.25.6 linux/amd64

Output of go env in your module/workspace:

# I don't have direct access to "go env" but this is "go tool dist env"
GO111MODULE="";
GOARCH="s390x";
GOBIN="/build/reproducible-path/golang-1.25-1.25.6/bin";
GODEBUG="";
GOENV="off";
GOFLAGS="";
GOHOSTARCH="s390x";
GOHOSTOS="linux";
GOOS="linux";
GOPROXY="https://proxy.golang.org,direct";
GOROOT="/build/reproducible-path/golang-1.25-1.25.6";
GOTMPDIR="";
GOTOOLDIR="/build/reproducible-path/golang-1.25-1.25.6/pkg/tool/linux_s390x";
GOWORK="off";

What did you do?

I built Go 1.25.6 on Debian Unstable (GCC 15) on an s390x machine, and got hairy TestTSAN failures.

I don't think we have rebuilt this package in Debian since https://tracker.debian.org/news/1699395/accepted-gcc-15-1520-12-source-all-amd64-into-unstable/ and "Build liblsan and libtsan on s390x." there seems way too related to be coincidence, so I think there's either an issue in how libtsan is being used in Go on s390x or there's another bug in libtsan (like #75553, but this time specific to s390x - it's a distinctly different failure from that one, though).

What did you see happen?

--- FAIL: TestTSAN (13.61s)
    --- FAIL: TestTSAN/tsan (0.54s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan1215000322/001/tsan exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=50181)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan9 (0.90s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan9928913829/001/tsan9 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=50280)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan15 (0.85s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan152618511370/001/tsan15 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=50444)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan14 (0.72s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan144157282328/001/tsan14 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=50610)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan13 (1.09s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan134113850043/001/tsan13 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51273)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan12 (0.87s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan122513411277/001/tsan12 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51278)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan10 (0.73s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan103572061401/001/tsan10 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51544)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan11 (0.80s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan114031899571/001/tsan11 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51553)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan8 (0.70s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan81818429964/001/tsan8 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51841)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan5 (0.84s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan52282192554/001/tsan5 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=51862)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan6 (0.68s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan61773838128/001/tsan6 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=52111)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan7 (0.80s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan71232455302/001/tsan7 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=52125)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan3 (0.65s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan32121751930/001/tsan3 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=52367)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan4 (0.85s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan42587900403/001/tsan4 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=52471)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
    --- FAIL: TestTSAN/tsan2 (0.52s)
        tsan_test.go:99: /usr/bin/setarch s390x -R /tmp/TestTSANtsan21743181612/001/tsan2 exited with exit status 66
            ThreadSanitizer: CHECK failed: tsan_platform_linux.cpp:571 "((thr_beg)) >= ((tls_addr))" (0x3ffac69e140, 0x3ffac69e240) (tid=52625)
                #0 __tsan::CheckUnwind() ../../../../src/libsanitizer/tsan/tsan_rtl.cpp:676 (libtsan.so.2+0x9020f) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #1 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86 (libtsan.so.2+0xcfbf9) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #2 __tsan::ImitateTlsWrite(__tsan::ThreadState*, unsigned long, unsigned long) ../../../../src/libsanitizer/tsan/tsan_platform_linux.cpp:571 (libtsan.so.2+0x8e0c3) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #3 __tsan::ThreadStart(__tsan::ThreadState*, unsigned int, unsigned long long, __sanitizer::ThreadType) ../../../../src/libsanitizer/tsan/tsan_rtl_thread.cpp:203 (libtsan.so.2+0xa9035) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #4 __tsan_thread_start_func ../../../../src/libsanitizer/tsan/tsan_interceptors_posix.cpp:1028 (libtsan.so.2+0x3cb75) (BuildId: f875f192ade23bc40881328d687242f532ffe220)
                #5 <null> <null> (libc.so.6+0xa51a1) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
                #6 <null> <null> (libc.so.6+0x12715f) (BuildId: 906fc7e75bfa917e7bdb55fef57cec35268ce523)
            
FAIL
FAIL	cmd/cgo/internal/testsanitizers	19.550s

What did you expect to see?

ok  	cmd/cgo/internal/testsanitizers	22.122s

(shamelessly taken from our ppc64le output of the same version)

[tianon]

The full build log is in https://buildd.debian.org/status/fetch.php?pkg=golang-1.25&arch=s390x&ver=1.25.6-1&stamp=1769154463&file=log

I've also attached it here for easier access / better persistence: s390x.log

To be clear, I'm not expecting a miracle - more eyeballs would be nice before I just disable this test on s390x like we did in response to #75553 on riscv64. 🙇 ❤️

edit: for posterity/cross-linking's sake, I'm updating this include a link to the Debian bug I've just filed for this: https://bugs.debian.org/1126312 (but as an edit to an existing comment because it's not worth extra notifications just to add this link)

[tianon]

Also, while I state above that I don't have direct access to the machine that performed this build, I can go through some backflips to reproduce on a similar machine, if there's more debugging or testing that would be helpful.

[dmitshur]

CC @golang/s390x.

[srinivas-pokala]

@tianon thanks for reporting the issue, Currently we are looking into the issue.