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Date: Mon, 13 Jan 2014 15:59:20 +0000 From: Luis Henriques <luis.henriques@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Dan Carpenter <dan.carpenter@...cle.com>, Luis Henriques <luis.henriques@...onical.com> Subject: [PATCH 3.11 119/208] libceph: potential NULL dereference in ceph_osdc_handle_map() 3.11.10.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter <dan.carpenter@...cle.com> commit b72e19b9225d4297a18715b0998093d843d170fa upstream. 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.carpenter@...cle.com> Reviewed-by: Sage Weil <sage@...tank.com> Signed-off-by: Luis Henriques <luis.henriques@...onical.com> --- 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 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); -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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