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Date: Sat, 30 Jul 2011 10:21:30 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.7.10s 20110729 - problem listing services in /proc
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On Jul 30 14:44, jojelino wrote:
> Breakpoint 2, fhandler_registry::close (this=0x612cba5c)
>     at /tmp/winsup/winsup/cygwin/fhandler_registry.cc:856
> 856           cfree (value_name);
> 10: this->value_name = 0x612cb374 L"services"
> (gdb)
> Continuing.
> 
> 0x612cba5c->value_name = 0
> 0x612cb124_2->value_name = 0x612cba5c->value_name = 0x612cb374
> L"services" (quadruple-freed but known as not freed)
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x7c80bef7 in RaiseException () from
> /cygdrive/c/WINDOWS/system32/kernel32.dll
> 
> In brief, same address quadruple-freed. because of dangling pointer.
> Regards.

It turned out that I could reproduce the problem, I just didn't notice
it.  I expected an error message but find died silently, so I took that
as "it works".  Serves me right for looking into Cygwin bug reports too
late at night.

Fixed in CVS.  I'm going to create a new snpshot.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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