[3.15] gh-154848: Enforce frame boundaries in the C unpickler (GH-154893) - #154977
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serhiy-storchaka merged 1 commit intoJul 31, 2026
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…H-154893) The C unpickler did not enforce PEP 3154 frame boundaries: an opcode or its argument could straddle a frame, and a new frame could begin before the previous one ended. Such reads now raise UnpicklingError, as in the pure Python implementation. (cherry picked from commit 10a8454) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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The C unpickler did not enforce PEP 3154 frame boundaries: an opcode or its
argument could straddle a frame, and a new frame could begin before the
previous one ended. Such reads now raise UnpicklingError, as in the pure
Python implementation.
(cherry picked from commit 10a8454)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com
Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com