ceph: do not feed bad device ids to crush
Do not feed bad (large) device ids to CRUSH.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/osdmap.c b/fs/ceph/osdmap.c
index 8c994c7..be5318a 100644
--- a/fs/ceph/osdmap.c
+++ b/fs/ceph/osdmap.c
@@ -868,6 +868,11 @@
ps = le16_to_cpu(pgid.ps);
preferred = (s16)le16_to_cpu(pgid.preferred);
+ /* don't forcefeed bad device ids to crush */
+ if (preferred >= osdmap->max_osd ||
+ preferred >= osdmap->crush->max_devices)
+ preferred = -1;
+
if (poolid >= osdmap->num_pools)
return NULL;
pool = &osdmap->pg_pool[poolid];