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GeezerVison is showing github.com — gh-111178: fix UBSan failures in `Modules/_pickle.c` by picnixz · Pull Request #129787 · python/cpython

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@picnixz

@picnixz picnixz commented Feb 7, 2025 •
edited by bedevere-app Bot
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This PR fixes the UBSan failures and addresses some minor cosmetic changes. PEP-7 changes were not applied since they could scramble the diff but other semantic changes affecting the signature of touched functions may have been done.

  • Issue: UBSan: Calling a function through pointer to incorrect function type is undefined behavior #111178

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picnixz added 8 commits January 25, 2025 15:16
@picnixz
fix UBSan failures for Pdata
47cddff
@picnixz
fix UBSan failures for PicklerObject
61da4f2
@picnixz
fix UBSan failures for UnpicklerObject
d1e782c
@picnixz
fix UBSan failures for PicklerMemoProxyObject
0b1d726
@picnixz
fix UBSan failures for UnpicklerMemoProxyObject
e3bcf30
@picnixz
indicate safe fast cast to avoid redundant future checks
fc28046
@picnixz
use semantically correct parameter names
d019c95
@picnixz
Merge remote-tracking branch 'upstream/main' into fix/ubsan/pickle-11…
8c290f6
…1178
@picnixz picnixz added the skip news label Feb 7, 2025
@bedevere-app bedevere-app Bot mentioned this pull request Feb 7, 2025
UBSan: Calling a function through pointer to incorrect function type is undefined behavior #111178
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@picnixz
picnixz marked this pull request as ready for review February 7, 2025 18:08
@bedevere-app bedevere-app Bot added the awaiting core review label Feb 7, 2025
@picnixz

picnixz commented Feb 7, 2025

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Ah I'm sorry I put this one as ready for review but I learned that _ + capital letter was also UB (#128248 (comment)) so I'll fix them tomorrow.

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@picnixz
picnixz marked this pull request as draft February 7, 2025 18:37
@bedevere-app bedevere-app Bot removed the awaiting core review label Feb 7, 2025
@picnixz
Do Do not use _ + capital letter in new code as it is also UB.
2e46447
@picnixz
picnixz marked this pull request as ready for review February 8, 2025 09:28
@bedevere-app bedevere-app Bot added the awaiting core review label Feb 8, 2025
@encukou
Merge branch 'main' into fix/ubsan/pickle-111178
045b936
@encukou
encukou merged commit 5a13faa into python:main Feb 20, 2025
@bedevere-app bedevere-app Bot removed the awaiting core review label Feb 20, 2025
@picnixz
picnixz deleted the fix/ubsan/pickle-111178 branch February 21, 2025 12:35
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@picnixz @encukou
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