From 756ca198e86a0b764344938037a5cbef40dbede6 Mon Sep 17 00:00:00 2001
From: Maksym Sobolyev <sobomax@sippysoft.com>
Date: Fri, 25 Oct 2024 12:21:36 -0700
Subject: [PATCH] Make sure session is locked while processing cancel.

---
 sippy/ua.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sippy/ua.go b/sippy/ua.go
index 0712880..16fc587 100644
--- a/sippy/ua.go
+++ b/sippy/ua.go
@@ -222,9 +222,15 @@ REQ_LOOP:
         if self.pr_rel {
             t.SetPrackCBs(self.RecvPRACK, disc_fn)
         }
+        cancel_cb := self.state.RecvCancel
+        cancel_fn := func(rtime *sippy_time.MonoTime, req sippy_types.SipRequest) {
+            self.session_lock.Lock()
+            cancel_cb(rtime, req)
+            self.session_lock.Unlock()
+        }
         return &sippy_types.Ua_context{
             Response : nil,
-            CancelCB : self.state.RecvCancel,
+            CancelCB : cancel_fn,
             NoAckCB  : disc_fn,
         }
     } else {