rgw/coroutine: check for null stack on wakeup

Fixes: https://tracker.ceph.com/issues/56920
Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/src/rgw/rgw_coroutine.cc b/src/rgw/rgw_coroutine.cc
index 56316c096b0a8bd0a141de3a6f6d05f0e7d029f0..797df9d8d67014718b57b27627c9188c622a8231 100644 (file)
--- a/src/rgw/rgw_coroutine.cc
+++ b/src/rgw/rgw_coroutine.cc
@@ -1019,7 +1019,9 @@ bool RGWCoroutine::drain_children(int num_cr_left,
 
 void RGWCoroutine::wakeup()
 {
-  stack->wakeup();
+  if (stack) {
+    stack->wakeup();
+  }
 }
 
 RGWCoroutinesEnv *RGWCoroutine::get_env() const