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-rw-r--r--fs/ceph/snap.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 87007203f130..0b236ebd989f 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -1111,6 +1111,19 @@ skip_inode:
continue;
adjust_snap_realm_parent(mdsc, child, realm->ino);
}
+ } else {
+ /*
+ * In the non-split case both 'num_split_inos' and
+ * 'num_split_realms' should be 0, making this a no-op.
+ * However the MDS happens to populate 'split_realms' list
+ * in one of the UPDATE op cases by mistake.
+ *
+ * Skip both lists just in case to ensure that 'p' is
+ * positioned at the start of realm info, as expected by
+ * ceph_update_snap_trace().
+ */
+ p += sizeof(u64) * num_split_inos;
+ p += sizeof(u64) * num_split_realms;
}
/*