On Mar 17 09:11, Corinna Vinschen via RT wrote:
> Hi,
>
> the below patch is against current CVS HEAD, but it should be applied
> to all supported branches of OpenSSL, starting with 0.9.8.
>
> On systems running on the Windows platform, there's a DllMain function
> in crypto/cryptlib.c which always calls ERR_remove_state(0) if an
> application thread exits. While this may be ok for native Windows
> applications, it's wrong for applications running under Cygwin, given
> that Cygwin is a POSIX environment.
>
> Not only that compliant applications are written so that they call
> ERR_remove_state by themselves right before exiting from a thread, the
> gratuitous ERR_remove_state call in DllMain also potentially crashes
> threaded applications.
>
> For examples see http://bugs.python.org/issue3947 and
> http://cygwin.com/ml/cygwin/2008-11/msg00341.html
>
> The latest openssl package in the Cygwin net distribution also has this
> patch applied.
Here's the patch against latest CVS. However, it would be nice if it
could be applied in the 0.9.8 branch as well.
Thanks,
Corinna
Index: crypto/cryptlib.c
===================================================================
RCS file: /home/cvs/cvsroot/src/openssl/crypto/cryptlib.c,v
retrieving revision 1.87
diff -u -p -r1.87 cryptlib.c
--- crypto/cryptlib.c 3 Feb 2011 23:12:01 -0000 1.87
+++ crypto/cryptlib.c 22 Mar 2011 11:02:45 -0000
@@ -208,7 +208,7 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL,
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
-#ifndef OPENSSL_FIPS
+#if !defined(OPENSSL_FIPS) && !defined(__CYGWIN__)
ERR_remove_state(0);
#endif
break;
--
Corinna Vinschen
Cygwin Project Co-Leader
Red Hat
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