musl - pthread_getspecific(3) with negative key

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Message-ID: <fc13f251-29fb-1e56-8b30-89afc0515e85@bell-sw.com>
Date: Wed, 8 Jul 2020 11:59:16 +0300
From: Alexander Scherbatiy <alexander.scherbatiy@...l-sw.com>
To: musl@...ts.openwall.com
Subject: pthread_getspecific(3) with negative key

Hello,

The pthread_getspecific(3) specification describes:
   "The pthread_getspecific() function shall return the thread-specific 
data value associated with the given key. If no thread-specific data 
value is associated with key, then the value NULL shall be returned. "

The glibc version pthread_getspecific(3) returns NULL for the negative 
key value.
The musl version does not check key bounds [1].
Is it intentional behavior?

[1] 
https://git.musl-libc.org/cgit/musl/tree/src/thread/pthread_getspecific.c#n7

Thanks,
Alexander.

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