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[3.11] gh-101975: Fixed a potential SegFault on garbage collection (GH-102803) (GH-102807)

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Authored-by: gaogaotiantian <gaogaotiantian@hotmail.com>
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Mark Shannon 2023-03-20 14:42:15 +00:00 • committed by GitHub
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Misc/NEWS.d/next/Core and Builtins/2023-03-18-02-36-39.gh-issue-101975.HwMR1d.rst Normal file
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@ -0,0 +1 @@
Fixed ``stacktop`` value on tracing entries to avoid corruption on garbage collection.

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Python/ceval.c
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@ -1536,6 +1536,7 @@ eval_frame_handle_pending(PyThreadState *tstate)
_PyFrame_SetStackPointer(frame, stack_pointer); \ _PyFrame_SetStackPointer(frame, stack_pointer); \
int err = trace_function_entry(tstate, frame); \ int err = trace_function_entry(tstate, frame); \
stack_pointer = _PyFrame_GetStackPointer(frame); \ stack_pointer = _PyFrame_GetStackPointer(frame); \
frame->stacktop = -1; \
if (err) { \ if (err) { \
goto error; \ goto error; \
} \ } \