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[3.14] gh-130567: Fix possible crash in locale.strxfrm() (GH-138940)#139265

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Merged

encukou merged 2 commits intopython:3.14frommiss-islington:backport-5854cf3-3.14

Oct 7, 2025

Merged

[3.14] gh-130567: Fix possible crash in locale.strxfrm() (GH-138940)#139265

encukou merged 2 commits intopython:3.14frommiss-islington:backport-5854cf3-3.14

Oct 7, 2025

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miss-islington commentedSep 23, 2025•
edited by bedevere-appbot
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On some macOS versions there was an off-by-one error in wcsxfrm() which
caused writing past the end of the array if its size was not calculated
by running wcsxfrm() first.
(cherry picked from commit5854cf3)

Co-authored-by: Serhiy Storchakastorchaka@gmail.com
Co-authored-by: Ronald Oussorenronaldoussoren@mac.com

Issue:strxfrm fails on macOS 15 with OSError: [Errno 22] Invalid argument #130567

pythongh-130567: Fix possible crash in locale.strxfrm() (pythonGH-138940

d456311

)On some macOS versions there was an off-by-one error in wcsxfrm() whichcaused writing past the end of the array if its size was not calculatedby running wcsxfrm() first.(cherry picked from commit5854cf3)Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>