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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"\"disallowed arm64 system call\" crashes on Android API levels 26-30","articleBody":"# Crash report\r\n\r\n### What happened?\r\n\r\nI've seen two versions of this crash. The first one mostly affects the asyncio tests, but also some others, e.g. `test_type_params`.\r\n\r\nIt happens both on an emulator (API levels 26-29) and a physical device (Nexus 5X, API level 27). It does not happen on API levels 25 or 30 (but see the other crash below), nor on 34, which is the version that will be used by the buildbot.\r\n\r\nHere's a log from API level 29. All the other versions are similar, except that API level 26 and 27 say \"disallowed arm64 system call 0\" instead of 434.\r\n\r\n```\r\n18:33:56.889 python.stdout    I  test_check_thread (test.test_asyncio.test_base_events.BaseEventLoopTests.test_check_thread) ... \r\n18:33:56.932 python.stdout    I  ok\r\n18:33:56.932 python.stdout    I  test_close (test.test_asyncio.test_base_events.BaseEventLoopTests.test_close) ... \r\n18:33:56.933 python.stdout    I  ok\r\n18:33:56.933 python.stdout    I  test_create_named_task_with_custom_factory (test.test_asyncio.test_base_events.BaseEventLoopTests.test_create_named_task_with_custom_factory) ... \r\n18:33:56.934 libc             A  Fatal signal 31 (SIGSYS), code 1 (SYS_SECCOMP) in tid 6011 (.python.testbed), pid 6011 (.python.testbed)\r\n18:33:56.954 crash_dump64     I  obtaining output fd from tombstoned, type: kDebuggerdTombstone\r\n18:33:56.957 DEBUG            A  *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\r\n18:33:56.957 DEBUG            A  Build fingerprint: 'google/sdk_gphone64_arm64/emulator64_arm64:10/QSR1.211112.010/10744382:userdebug/dev-keys'\r\n18:33:56.957 DEBUG            A  Revision: '0'\r\n18:33:56.957 DEBUG            A  ABI: 'arm64'\r\n18:33:56.958 DEBUG            A  Timestamp: 2024-08-14 18:33:56+0100\r\n18:33:56.958 DEBUG            A  pid: 6011, tid: 6011, name: .python.testbed  \u003e\u003e\u003e org.python.testbed \u003c\u003c\u003c\r\n18:33:56.958 DEBUG            A  uid: 10144\r\n18:33:56.958 DEBUG            A  signal 31 (SIGSYS), code 1 (SYS_SECCOMP), fault addr --------\r\n18:33:56.958 DEBUG            A  Cause: seccomp prevented call to disallowed arm64 system call 434\r\n18:33:56.958 DEBUG            A      x0  000000000000177b  x1  0000000000000000  x2  0000007fd13766c0  x3  0000007fd1376740\r\n18:33:56.958 DEBUG            A      x4  0000000000000200  x5  0000007fd1376628  x6  0000007fd1376628  x7  0000000000000002\r\n18:33:56.958 DEBUG            A      x8  00000000000001b2  x9  bf29487f6e1cf2c9  x10 0000007fd1376a58  x11 0000007e3b9c662c\r\n18:33:56.958 DEBUG            A      x12 000000000000010b  x13 0000007e3b9c7f54  x14 0000000000000062  x15 0000000000000020\r\n18:33:56.958 DEBUG            A      x16 0000007e3baea3c8  x17 0000007f27d44220  x18 0000000000000000  x19 0000007f2b950020\r\n18:33:56.958 DEBUG            A      x20 0000007e3bb85fa8  x21 0000007e9e8616c0  x22 0000007e39411b70  x23 8000000000000002\r\n18:33:56.958 DEBUG            A      x24 0000007e9e8616c0  x25 0000007e9e8616b0  x26 0000007e39411b70  x27 0000007e9e861648\r\n18:33:56.958 DEBUG            A      x28 0000007e3bb85fa8  x29 0000007fd1376ab0\r\n18:33:56.958 DEBUG            A      sp  0000007fd1376aa0  lr  0000007e3ba264ac  pc  0000007f27d44240\r\n```\r\n\r\n\u003cdetails\u003e\r\n\u003csummary\u003eBacktrace\u003c/summary\u003e\r\n\r\n```\r\n18:33:57.041 DEBUG            A  \r\n                                 backtrace:\r\n18:33:57.041 DEBUG            A        #00 pc 000000000007f240  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+32) (BuildId: c042ffb4e195c9462700c20f99189c2b)\r\n18:33:57.041 DEBUG            A        #01 pc 000000000040c4a8  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #02 pc 0000000000293984  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #03 pc 0000000000240f34  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (PyObject_Vectorcall+92) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #04 pc 0000000000377ba0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+16500) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #05 pc 000000000024056c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #06 pc 00000000002415fc  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #07 pc 00000000002d7bc8  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #08 pc 00000000002c9f38  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #09 pc 0000000000240754  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyObject_MakeTpCall+296) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #10 pc 0000000000377ba0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+16500) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #11 pc 0000000000243ca0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #12 pc 000000000037a4b4  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+27016) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #13 pc 000000000024056c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #14 pc 00000000002415fc  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #15 pc 00000000002d0b80  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #16 pc 0000000000240754  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyObject_MakeTpCall+296) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #17 pc 0000000000375c50  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+8484) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #18 pc 0000000000243ca0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #19 pc 000000000037a4b4  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+27016) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #20 pc 000000000024056c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #21 pc 00000000002415fc  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #22 pc 00000000002d0b80  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #23 pc 0000000000240754  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyObject_MakeTpCall+296) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #24 pc 0000000000377ba0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+16500) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #25 pc 0000000000243ca0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #26 pc 000000000037a4b4  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+27016) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #27 pc 000000000024056c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #28 pc 00000000002415fc  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #29 pc 00000000002d0b80  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #30 pc 0000000000240754  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyObject_MakeTpCall+296) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #31 pc 0000000000377ba0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+16500) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #32 pc 0000000000373838  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (PyEval_EvalCode+308) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #33 pc 000000000037073c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #34 pc 000000000037a8e8  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+28092) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #35 pc 0000000000373838  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (PyEval_EvalCode+308) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #36 pc 000000000037073c  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #37 pc 0000000000293984  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #38 pc 0000000000240f34  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (PyObject_Vectorcall+92) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #39 pc 0000000000377ba0  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (_PyEval_EvalFrameDefault+16500) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #40 pc 0000000000401108  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #41 pc 0000000000400704  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libpython3.14.so (Py_RunMain+1544) (BuildId: 7a9e2cc5793608ec69a9b011e3d402888fdc63dd)\r\n18:33:57.041 DEBUG            A        #42 pc 00000000000012a8  /data/app/org.python.testbed--6MoesW_JSB_WMIUJ8RxCg==/lib/arm64/libmain_activity.so (Java_org_python_testbed_PythonTestRunner_runPython+420) (BuildId: 35a3871328d919cad4212115b139c278b49fe120)\r\n```\r\n\u003c/details\u003e\r\n\r\n### CPython versions tested on:\r\n\r\nCPython main branch\r\n\r\n### Operating systems tested on:\r\n\r\nOther\r\n\r\n### Output from running 'python -VV' on the command line:\r\n\r\nCPython 3.14.0a0 (heads/android-test-script-dirty:ae3a460a043, Aug 12 2024, 22:45:13) [Clang 17.0.2 (https://android.googlesource.com/toolchain/llvm-project d9f89f4d1\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-124458\n* gh-124543\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/mhsmith","@type":"Person","name":"mhsmith"},"datePublished":"2024-08-14T16:25:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/123014/cpython/issues/123014"}