From ccc2f243d96175cc75c10e6cda9bcef45494db3d Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@gmail.com>
Date: Tue, 24 May 2011 16:48:54 +0200
Subject: [PATCH] --- yaml --- r: 251285 b: refs/heads/master c:
 78f4bb367fd147a0e7e3998ba6e47109999d8814 h: refs/heads/master i:   251283:
 2d1871ab80746f5480822b808ae22ee1ac1b3234 v: v3

---
 [refs]                     | 2 +-
 trunk/drivers/block/loop.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 029e7517ee38..78ba619ddcf7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0ddf72be4edbd7640b57c13161f71416df16ec11
+refs/heads/master: 78f4bb367fd147a0e7e3998ba6e47109999d8814
diff --git a/trunk/drivers/block/loop.c b/trunk/drivers/block/loop.c
index a076a14ca72d..cbf7052d1dd5 100644
--- a/trunk/drivers/block/loop.c
+++ b/trunk/drivers/block/loop.c
@@ -1691,6 +1691,9 @@ static int __init loop_init(void)
 	if (max_part > 0)
 		part_shift = fls(max_part);
 
+	if ((1UL << part_shift) > DISK_MAX_PARTS)
+		return -EINVAL;
+
 	if (max_loop > 1UL << (MINORBITS - part_shift))
 		return -EINVAL;