HTTP/3: fixed segfault when using SSL certificates with variables.

A QUIC connection doesn't have c->log->data and friends initialized to sensible
values.  Yet, a request can be created in the certificate callback with such an
assumption, which leads to a segmentation fault due to null pointer dereference
in ngx_http_free_request().  The fix is to adjust initializing the QUIC part of
a connection such that it has all of that in place.

Further, this appends logging error context for unsuccessful QUIC handshakes:
- cannot load certificate .. while handling frames
- SSL_do_handshake() failed .. while sending frames

1 files changed, 0 insertions, 2 deletions

diff --git a/src/http/modules/ngx_http_quic_module.c b/src/http/modules/ngx_http_quic_module.c
index b41c069b6..ce13a223f 100644
--- a/src/http/modules/ngx_http_quic_module.c
+++ b/src/http/modules/ngx_http_quic_module.c
@@ -198,8 +198,6 @@ ngx_http_quic_init(ngx_connection_t *c)
     hc->ssl = 1;
 
     if (c->quic == NULL) {
-        c->log->connection = c->number;
-
         qcf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_quic_module);
 
         ngx_quic_run(c, qcf);