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[3.14] gh-148178: Validate remote debug offset tables on load (GH-148187) - #148577
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…ythonGH-148187) Treat the debug offset tables read from a target process as untrusted input and validate them before the unwinder uses any reported sizes or offsets. Add a shared validator in debug_offsets_validation.h and run it once when _Py_DebugOffsets is loaded and once when AsyncioDebug is loaded. The checks cover section sizes used for fixed local buffers and every offset that is later dereferenced against a local buffer or local object view. This keeps the bounds checks out of the sampling hot path while rejecting malformed tables up front. (cherry picked from commit 289fd2c) Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
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Treat the debug offset tables read from a target process as untrusted input and validate them before the unwinder uses any reported sizes or offsets.
Add a shared validator in debug_offsets_validation.h and run it once when _Py_DebugOffsets is loaded and once when AsyncioDebug is loaded. The checks cover section sizes used for fixed local buffers and every offset that is later dereferenced against a local buffer or local object view. This keeps the bounds checks out of the sampling hot path while rejecting malformed tables up front.
(cherry picked from commit 289fd2c)