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GeezerVison is showing github.com — gh-150858: add stop-the-world in `type_set_qualname` by KowalskiThomas · Pull Request #150859 · python/cpython

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@KowalskiThomas

@KowalskiThomas KowalskiThomas commented Jun 3, 2026 •
edited by bedevere-app Bot
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Fixes #150858.

  • Issue: Race in type_set_qualname leads to memory corruption under free-threading #150858

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@KowalskiThomas
fix: stop-the-world in type_set_qualname
a9f09e0
@bedevere-app bedevere-app Bot mentioned this pull request Jun 3, 2026
Race in type_set_qualname leads to memory corruption under free-threading #150858
Closed
@KowalskiThomas
misc: add news entry
317fbf4
@KowalskiThomas
KowalskiThomas marked this pull request as ready for review June 5, 2026 12:42
@KowalskiThomas
KowalskiThomas requested a review from markshannon as a code owner June 5, 2026 12:42
@bedevere-app bedevere-app Bot added the awaiting review label Jun 5, 2026
kumaraditya303
kumaraditya303 approved these changes Jun 11, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting review labels Jun 11, 2026
kumaraditya303
kumaraditya303 reviewed Jun 11, 2026
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Comment thread Misc/NEWS.d/next/Core_and_Builtins/2026-06-03-16-27-00.gh-issue-150858.j2dSkD.rst Resolved

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@kumaraditya303
Update Misc/NEWS.d/next/Core_and_Builtins/2026-06-03-16-27-00.gh-issu…
7a37117 
…e-150858.j2dSkD.rst
@kumaraditya303
kumaraditya303 enabled auto-merge (squash) June 11, 2026 11:41
@KowalskiThomas

KowalskiThomas commented Jun 11, 2026 •
edited
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Seems like CI failed (due to an unrelated test I think) so auto merge won't do anything
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@kumaraditya303
kumaraditya303 merged commit 1ec6596 into python:main Jun 11, 2026
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@bedevere-app bedevere-app Bot removed the awaiting merge label Jun 11, 2026
philthompson10 pushed a commit to philthompson10/cpython that referenced this pull request Jun 17, 2026
@KowalskiThomas @philthompson10
pythongh-150858: fix data race while changing __qualname__ of a typ…
815b6ac 
…e object(python#150859)
@nascheme nascheme mentioned this pull request Jul 14, 2026
Backport free-threading memory-safety fixes to 3.14 and 3.15 #153714
Closed
@kumaraditya303 kumaraditya303 added the needs backport to 3.15 bugs and security fixes label Jul 15, 2026
@miss-islington-app

miss-islington-app Bot commented Jul 15, 2026

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Thanks @KowalskiThomas for the PR, and @kumaraditya303 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖
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@bedevere-app

bedevere-app Bot commented Jul 15, 2026

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GH-153747 is a backport of this pull request to the 3.15 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Jul 15, 2026
kumaraditya303 pushed a commit that referenced this pull request Jul 15, 2026
@miss-islington @KowalskiThomas
[3.15] gh-150858: fix data race while changing __qualname__ of a ty…
5125584 
…pe object(GH-150859) (#153747)

gh-150858: fix data race while changing `__qualname__` of a type object(GH-150859)
(cherry picked from commit 1ec6596)

Co-authored-by: Thomas Kowalski <[email protected]>
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@kumaraditya303 kumaraditya303 kumaraditya303 approved these changes
@markshannon markshannon Awaiting requested review from markshannon markshannon is a code owner

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Race in type_set_qualname leads to memory corruption under free-threading

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@KowalskiThomas @kumaraditya303
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