libceph: check length of osdmap osd arrays
Check length of osd_state, osd_weight and osd_addr arrays. They
should all have exactly max_osd elements after the call to
osdmap_set_max_osd().
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index ec06010..c39ac62 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -745,19 +745,25 @@
if (err)
goto bad;
- /* osds */
+ /* osd_state, osd_weight, osd_addrs->client_addr */
ceph_decode_need(p, end, 3*sizeof(u32) +
map->max_osd*(1 + sizeof(*map->osd_weight) +
sizeof(*map->osd_addr)), e_inval);
- *p += 4; /* skip length field (should match max) */
+ if (ceph_decode_32(p) != map->max_osd)
+ goto e_inval;
+
ceph_decode_copy(p, map->osd_state, map->max_osd);
- *p += 4; /* skip length field (should match max) */
+ if (ceph_decode_32(p) != map->max_osd)
+ goto e_inval;
+
for (i = 0; i < map->max_osd; i++)
map->osd_weight[i] = ceph_decode_32(p);
- *p += 4; /* skip length field (should match max) */
+ if (ceph_decode_32(p) != map->max_osd)
+ goto e_inval;
+
ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
for (i = 0; i < map->max_osd; i++)
ceph_decode_addr(&map->osd_addr[i]);