From 8639e34d2c5e12cc2e45c95b1a2e97c22bf6a711 Mon Sep 17 00:00:00 2001
From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Date: Mon, 29 Jan 2018 22:58:24 +0300
Subject: [PATCH] part: Allocate only one legacy_mbr buffer

Commit ff98cb90514d ("part: extract MBR signature from partitions")
blindly switched allocated by ALLOC_CACHE_ALIGN_BUFFER buffer type from
"unsigned char" to "legacy_mbr" which caused allocation of size =
(typeof(legacy_mbr) * dev_desc->blksize) instead of just space enough
for "legacy_mbr" structure.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Tom Rini <trini@konsulko.com>
---
 disk/part_dos.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/disk/part_dos.c b/disk/part_dos.c
index 046f9bbb3d..9dd086d3db 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -90,7 +90,7 @@ static int test_block_type(unsigned char *buffer)
 static int part_test_dos(struct blk_desc *dev_desc)
 {
 #ifndef CONFIG_SPL_BUILD
-	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz);
+	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, 1);
 
 	if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
 		return -1;