linux-kernel - [PATCH] fs: partitions: efi: Fix bound check

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Message-Id: <20131115.191422.1787913255098350249.apm@brigitte.kvy.fi>
Date:	Fri, 15 Nov 2013 19:14:22 +0200 (EET)
From:	Antti P Miettinen <amiettinen@...dia.com>
To:	axboe@...nel.dk, akpm@...ux-foundation.org, davidlohr@...com,
	matt.fleming@...el.com, kzak@...hat.com
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] fs: partitions: efi: Fix bound check

Use ARRAY_SIZE instead of sizeof to get proper max for label
length.

Signed-off-by: Antti P Miettinen <amiettinen@...dia.com>
Reviewed-by: Hiroshi Doyu <hdoyu@...dia.com>
Tested-by: Hiroshi Doyu <hdoyu@...dia.com>
---
 block/partitions/efi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index a8287b4..dc51f46 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -96,6 +96,7 @@
  * - Code works, detects all the partitions.
  *
  ************************************************************/
+#include <linux/kernel.h>
 #include <linux/crc32.h>
 #include <linux/ctype.h>
 #include <linux/math64.h>
@@ -715,8 +716,8 @@ int efi_partition(struct parsed_partitions *state)
 		efi_guid_unparse(&ptes[i].unique_partition_guid, info->uuid);
 
 		/* Naively convert UTF16-LE to 7 bits. */
-		label_max = min(sizeof(info->volname) - 1,
-				sizeof(ptes[i].partition_name));
+		label_max = min(ARRAY_SIZE(info->volname) - 1,
+				ARRAY_SIZE(ptes[i].partition_name));
 		info->volname[label_max] = 0;
 		while (label_count < label_max) {
 			u8 c = ptes[i].partition_name[label_count] & 0xff;
-- 
1.8.3.2
--
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