From: Daniel P. Berrangé <berra...@redhat.com> We want some visibility on stderr when the GNUTLS thread safety countermeasures are activated, to encourage people to get the real fix deployed (once it exists). Some trace points will also help if we see any further wierd crash scenario we've not anticipated.
Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> Signed-off-by: Daniel P. Berrangé <berra...@redhat.com> Reviewed-by: Fabiano Rosas <faro...@suse.de> Link: https://lore.kernel.org/qemu-devel/20250718150514.2635338-5-berra...@redhat.com [add missing include] Signed-off-by: Fabiano Rosas <faro...@suse.de> --- crypto/tlssession.c | 11 +++++++++++ crypto/trace-events | 2 ++ 2 files changed, 13 insertions(+) diff --git a/crypto/tlssession.c b/crypto/tlssession.c index baef878fa0..86d407a142 100644 --- a/crypto/tlssession.c +++ b/crypto/tlssession.c @@ -19,6 +19,7 @@ */ #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "qemu/thread.h" #include "crypto/tlssession.h" #include "crypto/tlscredsanon.h" @@ -615,10 +616,20 @@ qcrypto_tls_session_handshake(QCryptoTLSSession *session, * only have to protect against automatic rekeying * which doesn't trigger with CHACHA20 */ + trace_qcrypto_tls_session_parameters( + session, + session->requireThreadSafety, + gnutls_protocol_get_version(session->handle), + cipher); + if (session->requireThreadSafety && gnutls_protocol_get_version(session->handle) == GNUTLS_TLS1_3 && cipher != GNUTLS_CIPHER_CHACHA20_POLY1305) { + warn_report("WARNING: activating thread safety countermeasures " + "for potentially broken GNUTLS with TLS1.3 cipher=%d", + cipher); + trace_qcrypto_tls_session_bug1717_workaround(session); session->lockEnabled = true; } #endif diff --git a/crypto/trace-events b/crypto/trace-events index bccd0bbf29..d0e33427fa 100644 --- a/crypto/trace-events +++ b/crypto/trace-events @@ -21,6 +21,8 @@ qcrypto_tls_creds_x509_load_cert_list(void *creds, const char *file) "TLS creds # tlssession.c qcrypto_tls_session_new(void *session, void *creds, const char *hostname, const char *authzid, int endpoint) "TLS session new session=%p creds=%p hostname=%s authzid=%s endpoint=%d" qcrypto_tls_session_check_creds(void *session, const char *status) "TLS session check creds session=%p status=%s" +qcrypto_tls_session_parameters(void *session, int threadSafety, int protocol, int cipher) "TLS session parameters session=%p threadSafety=%d protocol=%d cipher=%d" +qcrypto_tls_session_bug1717_workaround(void *session) "TLS session bug1717 workaround session=%p" # tls-cipher-suites.c qcrypto_tls_cipher_suite_priority(const char *name) "priority: %s" -- 2.35.3
