From b72e19b9225d4297a18715b0998093d843d170fa Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 15 Aug 2013 08:52:48 +0300 Subject: [PATCH] libceph: potential NULL dereference in ceph_osdc_handle_map() 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 Reviewed-by: Sage Weil --- net/ceph/osd_client.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 3ee4a1da02cd..6a59fb8fc999 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -1793,6 +1793,8 @@ 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); -- 2.20.1