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gh-101975: Fixed a potential SegFault on garbage collection#102803

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markshannon merged 2 commits intopython:mainfromgaogaotiantian:fix-issue-101975
Mar 18, 2023

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@gaogaotiantiangaogaotiantian commentedMar 18, 2023•
edited by bedevere-bot
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frame->stacktop = 1 is missing on trace entry which could cause thegc on another thread to access freed memory.

RmZeta2718, jingxu94, xfoobar, and 3willows reacted with thumbs up emoji
@markshannonmarkshannon self-requested a reviewMarch 18, 2023 10:55
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Looks good.

I quickly checked the other uses of _PyFrame_GetStackPointer(frame) and this is the odd one out.

@markshannonmarkshannon added the needs backport to 3.11only security fixes labelMar 18, 2023
@markshannonmarkshannon merged commit039714d intopython:mainMar 18, 2023
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Thanks@gaogaotiantian for the PR, and@markshannon for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

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Sorry,@gaogaotiantian and@markshannon, I could not cleanly backport this to3.11 due to a conflict.
Please backport usingcherry_picker on command line.
cherry_picker 039714d00f147be4d018fa6aeaf174aad7e8fa32 3.11

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GH-102807 is a backport of this pull request to the3.11 branch.

@bedevere-botbedevere-bot removed the needs backport to 3.11only security fixes labelMar 18, 2023
@gaogaotiantiangaogaotiantian deleted the fix-issue-101975 branchMarch 18, 2023 14:41
markshannon added a commit that referenced this pull requestMar 20, 2023
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