Re: fdopen() leaks badly when multithreaded

[Wolfram Gloger]

> This short program demonstrates a fairly serious problem with
> fdopen() when used in a multi-threaded application.  The real
> application from which I condensed this actually segfaults, but
> this variant only seems to leak.  I've attached the output when
> running it under the glibc 2.2.4 that's in RedHat 7.2, and

Yep, I can reproduce this with glibc-2.2.5, too.  Basically, there
seems to be a peculiar failure path inside libio where the allocated
buffer isn't freed.  At the moment I can't see anything
thread-specific about this, although it is the multiple threads that
cause the fdopen() to fail occasionally (which I find perplexing, but
that is a different issue..).

I'm working on a patch, but I have to get myself a bit more acquainted
with libio first.

Regards,
Wolfram.