BUG/MEDIUM: quic: fix crash on CC if mux not present
If a CONNECTION_CLOSE is received during handshake or after mux release,
a segfault happens due to invalid dereferencement of qc->qcc. Check
mux_state first to prevent this.
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index bff1780..b71e427 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -2448,7 +2448,8 @@
case QUIC_FT_CONNECTION_CLOSE:
case QUIC_FT_CONNECTION_CLOSE_APP:
/* warn the mux to close the connection */
- qc->qcc->flags |= QC_CF_CC_RECV;
+ if (qc->mux_state == QC_MUX_READY)
+ qc->qcc->flags |= QC_CF_CC_RECV;
tasklet_wakeup(qc->qcc->wait_event.tasklet);
break;
case QUIC_FT_HANDSHAKE_DONE: