Merge pull request #12859 from ukernel/wip-18460

client: fix Client::handle_cap_flushsnap_ack() crash Reviewed-by: Greg Farnum <gfarnum@redhat.com>
ceph · Jan 13, 2017 · 868d419 · 868d419
2 parents 72103cf + 525c52f
commit 868d419
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/client/Client.cc b/src/client/Client.cc
@@ -4796,6 +4796,9 @@ void Client::handle_cap_flushsnap_ack(MetaSession *session, Inode *in, MClientCa
     } else {
       ldout(cct, 5) << "handle_cap_flushedsnap mds." << mds << " flushed snap follows " << follows
 	      << " on " << *in << dendl;
+      InodeRef tmp_ref;
+      if (in->get_num_ref() == 1)
+	tmp_ref = in; // make sure inode not get freed while erasing item from in->cap_snaps
       if (in->flushing_caps == 0 && in->cap_snaps.empty())
 	in->flushing_cap_item.remove_myself();
       session->flushing_caps_tids.erase(capsnap.flush_tid);