From: Josh Durgin <josh.durgin@inktank.com>
Date: Mon, 24 Sep 2012 21:26:51 +0000 (-0700)
Subject: librbd: don't allow order to be more than 64
X-Git-Tag: v0.53~41^2~35
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=52943a6a7063d358bd3a9f3652ccecd23e631f88;p=ceph.git

librbd: don't allow order to be more than 64

Otherwise it will overflow a uint64_t when shifting.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
---

diff --git a/src/librbd/internal.cc b/src/librbd/internal.cc
index a376da10f33..2e5fefac95a 100644
--- a/src/librbd/internal.cc
+++ b/src/librbd/internal.cc
@@ -692,8 +692,8 @@ reprotect_and_return_err:
     if (!order)
       return -EINVAL;
 
-    if (*order && (*order > 255 || *order < 12)) {
-      lderr(cct) << "order must be in the range [12, 255]" << dendl;
+    if (*order && (*order > 64 || *order < 12)) {
+      lderr(cct) << "order must be in the range [12, 64]" << dendl;
       return -EDOM;
     }