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Date: Tue, 05 Aug 2014 18:51:34 +0200
From: Jens Gustedt <jens.gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: PATCH: don't call cleanup handlers after a regular return from the
thread start function
Don't call cleanup handlers after a regular return from the thread
start function
The chained list of cleanup handler function uses list items that are
local to the respective function of a cleanup block. In case of a
return out of the middle of a cleanup block, using these list items
can lead to UB.
POSIX lists three different cases in which a cleanup handler that is
established on the cleanup stack has to be executed. Regular return
from the thread start function is not among these cases.
Linux manpages are more explicit and state:
Clean-up handlers are not called if the thread terminates by
performing a return from the thread start function.
This patch aligns musl to that behavior.
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