There are two places where we read "nr_maps" if both of them are set to
zero then we would hit a NULL dereference here.
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
I think this is a real bug, but please review my fix for it because I'm
not very familiar with this code.
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 559a832..56f1fe5 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1786,6 +1786,8 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
struct ceph_msg *msg)
nr_maps--;
}
+ if (!osdc->osdmap)
+ goto bad;
done:
downgrade_write(&osdc->map_sem);
ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
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