$ openvpn --show-pkcs11-ids /usr/lib64/p11-kit-proxy.so openvpn: _pkcs11h-crypto-openssl.c:235: __pkcs11h_crypto_openssl_certificate_is_issuer: Assertion `cert_blob!=((void *)0)' failed. Aborted (core dumped) The crash is fixed by this commit upstream: https://github.com/OpenSC/pkcs11-helper/commit/8d81cf6b46
I've also filed bug 1172240 against p11-kit since this shouldn't have been happening anyway...
pkcs11-helper-1.11-4.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/pkcs11-helper-1.11-4.fc21
Package pkcs11-helper-1.11-4.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing pkcs11-helper-1.11-4.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-16794/pkcs11-helper-1.11-4.fc21 then log in and leave karma (feedback).
pkcs11-helper-1.11-4.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.