[New-bugs-announce] [issue23565] local_clear walks the list of threads without holding head_lock.

[Daniel Stutzbach]

New submission from Daniel Stutzbach:

local_clear in _threadmodule.c walks the list of threads without holding head_mutex.  Since the list of threads can change when holding only head_mutex and not on the GIL, the list can change while local_clear is executing, which may cause Bad Things to happen.

----------
components: Library (Lib)
messages: 237078
nosy: stutzbach
priority: normal
severity: normal
status: open
title: local_clear walks the list of threads without holding head_lock.
type: behavior

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23565>
_______________________________________