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Date: Fri, 16 Jan 2015 09:07:50 +0100
From: Sebastian Gottschall <>
To: Natanael Copa <>
Subject: Re: pthreads broken (freeradius testcase)

Am 16.01.2015 um 08:20 schrieb Natanael Copa:
> On Thu, 15 Jan 2015 23:52:36 +0100
> Sebastian Gottschall <> wrote:
>> following test case
>> configure freeradius with --with-threads (which is on by default)
>> if you start radiusd with your radius configuration you will see that
>> radius does not listen on any ports. it will hang in the listener thread
>> which creates the socket.
>> if you configure it as --without-threads, it works
>> tested with musl 1.1.6 on a mips (big endian) system using kernel 3.10
>> Sebastian
> What version of freeradius is it?
latest 2.2.6
if you disable setguid support it will also work again. i tracked it 
down to the function
> I have had some interesting threading issues with freeradius 2.2.x.
> Some modules are marked as non-thread safe but will still run in a
> separate thread. It runs main thread + a single non-thread-safe thread.
it already hangs in the main application while initializing the udp 
listeners. this can be also seen if you start it with -xx and write the 
debug output to a log file.

> They used getgrnam and getpwnam in both main thread and in the
> non-thread-safe module so memory got corrupted. (IMHO this should get a
> CVE but upstream disagrees because it only happens on a non-recommended
> config)
> They fixed that in 3.x.x but AFAIK they didn't fix it in 2.x.x.
> Patches:
> (upstream patched it differently in 3.x.x branch)
> When backporting the fix to 2.x.x I also found that the TLS configure
> test is completely broke in 2.x.x branch too. IIRC it will say "TLS
> found" but behind the scenes it will still disable TLS support.
ouch. thanks. i stumble over that issue too. a user reported that bug 
recently to me.
> patch:
> This is probably not the related the issue you have have at hand, but
> I'm would not be surprised if musl libc has unmasked another bug in
> freeradius.
it has. and you helped me alot just right now

> -nc

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