Re: [libvirt] Core dump caused by misusing openssl in multithread scenario!
-----Original Message-----
From: Matthias Bolte [mailto:matthias.bolte@googlemail.com]
Sent: 2012年10月7日 2:14
To: Benjamin Wang (gendwang)
Cc: Daniel P. Berrange; libvir-list(a)redhat.com; Yang Zhou (yangzho)
Subject: Re: [libvirt] Core dump caused by misusing openssl in multithread scenario!
2012/10/2 Benjamin Wang (gendwang) <gendwang(a)cisco.com>:
Hi Daniel,
Is this problem fixed in the latest version? What about the question 2 which related
to openssl callbacks in multi-thread?
As Daniel said, we cannot assume that libcurl was build with OpenSSL backend. We would
need some way to detect this first.
[Benjamin]: I agree. But if libcurl want to access ESXi by https. OpenSSL will be used.
And libvirt must call CRYPTO_set_id_callback/CRYPTO_set_locking_callback
to support multi-threads
Also, wasn't there a license problem with OpenSSL and the (L)GPL? Can libvirt legally
be used with a libcurl that is linked with OpenSSL?
[Benjamin]: I think there is no open source license issue. We will not change libcurl or
openssl source code. What we needed is to call openssl
API(CRYPTO_set_id_callback/CRYPTO_set_locking_callback)
to support multi-threads.
--
Matthias Bolte
http://photron.blogspot.com