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Crash in_asyncio._swap_current_task due to improper reference counting #105987

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wolfi-dev/advisories
#8607
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topic-asynciotype-crashA hard crash of the interpreter, possibly with a core dump
@chgnrdv

Description

@chgnrdv

First appeared ina474e04, where given function was introduced.

Repro:

import_asyncioclassDummyLoop:passclassDummyTask:passl=DummyLoop()_asyncio._swap_current_task(l,DummyTask())t=_asyncio._swap_current_task(l,None)

Output:

Modules/gcmodule.c:461: visit_decref: Assertion "!_PyObject_IsFreed(op)" failedEnable tracemalloc to get the memory block allocation tracebackobject address  : 0x7fedad081130object refcount : 1object type     : 0x55f665a81fe0object type name: dictobject repr     : Segmentation fault (core dumped)

I'm working on a fix.

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    topic-asynciotype-crashA hard crash of the interpreter, possibly with a core dump

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