From 141053d60ac459bc3859c06fe7cf16160077f937 Mon Sep 17 00:00:00 2001
From: Peter Tyser <ptyser@xes-inc.com>
Date: Thu, 30 Dec 2010 15:47:56 -0600
Subject: [PATCH] cmd_jffs2: Fix get_part_sector_size_nor() overflow bug
When a flash partition was positioned at the very top of a 32-bit memory
map (eg located at 0xf8000000 with a size of 0x8000000)
get_part_sector_size_nor() would incorrectly calculate the partition's
ending address to 0x0 due to overflow. When the overflow occurred
get_part_sector_size_nor() would falsely return a sector size of 0.
A sector size of 0 results in subsequent jffs2 operations failing.
To workaround the overflow subtract 1 from calculated address of
the partition endpoint.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
---
common/cmd_jffs2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/common/cmd_jffs2.c b/common/cmd_jffs2.c
index 0e7a6b0f3b..27296ddd7d 100644
--- a/common/cmd_jffs2.c
+++ b/common/cmd_jffs2.c
@@ -281,7 +281,7 @@ static inline u32 get_part_sector_size_nor(struct mtdids *id, struct part_info *
flash = &flash_info[id->num];
start_phys = flash->start[0] + part->offset;
- end_phys = start_phys + part->size;
+ end_phys = start_phys + part->size - 1;
for (i = 0; i < flash->sector_count; i++) {
if (flash->start[i] >= end_phys)
--
2.39.5