[issue39453] Use-after-free in list contain

[STINNER Victor]

STINNER Victor  added the comment:

Thanks Dong-hee Na for the fix.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.7, Python 3.8

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[issue39453] Use-after-free in list contain

[miss-islington]

miss-islington  added the comment:


New changeset 3c57ca699910be74e7cf67d747b24bbc486932f1 by Miss Islington (bot) 
in branch '3.7':
[3.8] bpo-39453: Fix contains method of list to hold strong references 
(GH-18204)
https://github.com/python/cpython/commit/3c57ca699910be74e7cf67d747b24bbc486932f1


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[issue39453] Use-after-free in list contain

[miss-islington]

Change by miss-islington :


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pull_requests: +17911
pull_request: https://github.com/python/cpython/pull/18535

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[issue39453] Use-after-free in list contain

[STINNER Victor]

STINNER Victor  added the comment:


New changeset f64abd10563c25a94011f9e3335fd8a1cf47c205 by Dong-hee Na in branch 
'3.8':
[3.8] bpo-39453: Fix contains method of list to hold strong references 
(GH-18204)
https://github.com/python/cpython/commit/f64abd10563c25a94011f9e3335fd8a1cf47c205


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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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pull_requests: +17583
pull_request: https://github.com/python/cpython/pull/18206

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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pull_requests: +17582
pull_request: https://github.com/python/cpython/pull/18205

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[issue39453] Use-after-free in list contain

[miss-islington]

miss-islington  added the comment:


New changeset 9e1ed518a576897f914227bf538bac426a02a081 by Miss Islington (bot) 
(Dong-hee Na) in branch 'master':
bpo-39453: Add testcase for bpo-39453 (GH-18202)
https://github.com/python/cpython/commit/9e1ed518a576897f914227bf538bac426a02a081


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nosy: +miss-islington

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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pull_requests: +17581
pull_request: https://github.com/python/cpython/pull/18204

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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pull_requests: +17579
pull_request: https://github.com/python/cpython/pull/18202

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[issue39453] Use-after-free in list contain

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset 4dbf2d8c6789a9b7299b142033073213604b8fdc by Pablo Galindo 
(Dong-hee Na) in branch 'master':
bpo-39453: Make list.__contains__ hold strong references to avoid crashes 
(GH-18181)
https://github.com/python/cpython/commit/4dbf2d8c6789a9b7299b142033073213604b8fdc


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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Change by Dong-hee Na :


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keywords: +patch
pull_requests: +17567
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18181

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

Dong-hee Na  added the comment:

I will send a patch ASAP.

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[issue39453] Use-after-free in list contain

[Dong-hee Na]

New submission from Dong-hee Na :

class poc() :
def __eq__(self,other) :
l.clear()
return NotImplemented

l = [poc(), poc(), poc()]
3 in l

[1]2606 segmentation fault

sigh..

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assignee: corona10
messages: 360686
nosy: corona10, pablogsal, vstinner
priority: normal
severity: normal
status: open
title: Use-after-free in list contain
type: crash
versions: Python 3.9

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