[stunnel-users] Internal Errors

Małgorzata Olszówka Malgorzata.Olszowka at stunnel.org
Wed Jan 9 12:58:16 CET 2019

> I would like to report two bugs. I recently upgraded to stunnel 5.50 on 
> FreeBSD 12.0 and noticed that the stunnel server service now crashes 
> periodically. When checking the logs after a crash, I see the following 
> error:
> INTERNAL ERROR: Dead canary at 
> /usr/src/crypto/openssl/ssl/statem/extensions_sr
> INTERNAL ERROR: Double free attempt: ptr=0x802119050 
> alloc=/usr/src/crypto/openssl/crypto/stack/stack.c:198 
> free#1=/usr/src/crypto/openssl/crypto/stack/stack.c:376 
> free#2=/usr/src/crypto/openssl/ssl/ssl_sess.c:814

Thank you for reporting bugs, I'm trying to replicate them.
Is stunnel installed from sources or packages? What about openssl, is it 
installed from sources or packages?
Could you send
stunnel -version.

Best regards,
Małgorzata Olszówka

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