Date: Sun, 26 Feb 2017 16:33:12 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: ldso pthread finalization On Sun, Feb 26, 2017 at 12:48:07PM +0300, Леонид Юрьев wrote: > Hi, > > In glibc there are a couple of problems. I do not know whether they > are relevant for Musl. However, I think should pay attention. > > So, please take in accound two glibc bugs: > > 1) pthread_key_delete() race with thread finalization. > > A race condition could occur between the pthread_key_delete() and the > __nptl_deallocate_tsd(). I consider deletion of a key for which a value is set to be a type of use-after-free bug and thereby to have undefined behavior. POSIX does not seem to specify a behavior for it, and it does not seem possible to specify something consistent. > 2) pthread_key_create() destructors and segfault after a DSO unloading. musl does not unload DSOs, so this one is not relevant to musl. Rich
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