fix examine_brief segfault

When performing an "-Ebs -e <metadata type>" we segfault because the
superblock has been freed too early.  We also leak memory for 'ddf' and
'imsm' because, unlike super[01], we do not implicitly free when
->load_super is called on an already loaded supertype.

So, fix up imsm and ddf to match type 0 and 1 ->load_super() semantics,
and update Examine to not free the superblock until all usages have been
exhausted.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/Examine.c b/Examine.c
index f0e98f97..3d0ea8a5 100644
--- a/Examine.c
+++ b/Examine.c
@@ -114,10 +114,8 @@ int Examine(mddev_dev_t devlist, int brief, int export, int scan,
 				ap->st = st;
 				arrays = ap;
 				st->ss->getinfo_super(st, &ap->info);
-			} else {
+			} else
 				st->ss->getinfo_super(st, &ap->info);
-				st->ss->free_super(st);
-			}
 			if (!(ap->info.disk.state & (1<<MD_DISK_SYNC)))
 				ap->spares++;
 			d = dl_strdup(devlist->devname);