ceph: fix bad pointer dereference in ceph_fill_trace
We dereference *in a few lines down, but only set it on rename. It is
apparently pretty rare for this to trigger, but I have been hitting it
with a clustered MDSs.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 1d6a45b..cd0432c 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1055,7 +1055,8 @@
ininfo = rinfo->targeti.in;
vino.ino = le64_to_cpu(ininfo->ino);
vino.snap = le64_to_cpu(ininfo->snapid);
- if (!dn->d_inode) {
+ in = dn->d_inode;
+ if (!in) {
in = ceph_get_inode(sb, vino);
if (IS_ERR(in)) {
pr_err("fill_trace bad get_inode "