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UBsan: Remove _Py_NO_SANITIZE_UNDEFINED · Issue #133157 · python/cpython · GitHub

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UBsan: Remove _Py_NO_SANITIZE_UNDEFINED #133157

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extension-modulesinterpreter-coretopic-C-APItype-bug

opened on Apr 29, 2025

Bug report

Split out from the #111178 monster-issue:

We use the macro _Py_NO_SANITIZE_UNDEFINED to disable the UB sanitizer in some hard-to-fix cases, so that we can get a stable, regression-monitoring checker sooner.
To fully fix UBsan failures, we should get rid of the macro.
At least outside test functions.

Linked PRs

encukou
added
topic-C-API

type-bugAn unexpected behavior, bug, or error
on Apr 29, 2025
picnixz
self-assigned this
on May 15, 2025
picnixz
added
interpreter-core(Objects, Python, Grammar, and Parser dirs)

extension-modulesC modules in the Modules dir
on May 15, 2025
picnixz
added a commit that references this issue on May 18, 2025
gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faulthandl…
0a160bf
pablogsal
added a commit that references this issue on Jun 10, 2025
gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Parser/peg…
754e7c9
miss-islington
added a commit that references this issue on Jun 10, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…
b9a80b5
pablogsal
added a commit that references this issue on Jun 10, 2025
[3.14] gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Par…
904685f
picnixz
added 2 commits that reference this issue on Jun 10, 2025
[3.13] pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` i…
dc805f2
[3.13] gh-133157: fix UBSan failures in `Parser/pegen.c` (GH-134048) (#…
dd7ffdb
encukou
added a commit that references this issue on Jun 10, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
d0dc245
lkollar
added a commit that references this issue on Jun 19, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…
7e3b51e
encukou
added a commit that references this issue on Jul 1, 2025
gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyexpat` (#…
845263a
encukou commented on Jul 1, 2025
encukou
on Jul 1, 2025
MemberAuthor
Gone. Thank you, @picnixz!
encukou
closed this as completed on Jul 1, 2025
AndPuQing
added a commit that references this issue on Jul 11, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
c73da53
Pranjal095
added 3 commits that reference this issue on Jul 12, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faul…
7524e25
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…
154f4d9
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
ff0c21c
picnixz
added a commit that references this issue on Jul 13, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
1aa21a7
taegyunkim
added 3 commits that reference this issue on Aug 4, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faul…
91023f6
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…
11dbf09
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
cbdf818
Agent-Hellboy
added 2 commits that reference this issue on Aug 19, 2025
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…
77d1806
pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…
d1a9832

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