mon/MDSMonitor: copy MDS info which may be removed

Otherwise the log entry will contain garbage (and crash the mgr).

Fixes: https://tracker.ceph.com/issues/46216
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit f8aaf9500e01b3dd3923b2ce89d2365bfe73dc51)

diff --git a/src/mon/MDSMonitor.cc b/src/mon/MDSMonitor.cc
index 230793be2335c3f8f707a024428d5bf837b489ee..e60c06d46a49b55975dc1a86196d31783d96c120 100644 (file)
--- a/src/mon/MDSMonitor.cc
+++ b/src/mon/MDSMonitor.cc
@@ -2039,7 +2039,7 @@ bool MDSMonitor::check_health(FSMap& fsmap, bool* propose_osdmap)
   }
 
   for (const auto& gid : to_remove) {
-    auto& info = fsmap.get_info_gid(gid);
+    auto info = fsmap.get_info_gid(gid);
     const mds_info_t* rep_info = nullptr;
     if (info.rank >= 0) {
       auto fscid = fsmap.gid_fscid(gid);