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part_dos: fix crash with big sector size

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Apple iPod nanos have sector sizes of 2 or 4 KiB, which crashes U-Boot when it
tries to read the MBR into 512-byte buffer situated on stack. Instead use the
variable length arrays to be safe with any large sector size.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
This commit is contained in:
Sergei Shtylyov
2011-06-03 09:37:43 +00:00
committed by Wolfgang Denk
parent 4204298db0
commit 54193c5d81
2 changed files with 3 additions and 10 deletions
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6
disk/part_dos.c
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@@ -87,7 +87,7 @@ static int test_block_type(unsigned char *buffer)
int test_part_dos (block_dev_desc_t *dev_desc)
{
unsigned char buffer[DEFAULT_SECTOR_SIZE];
unsigned char buffer[dev_desc->blksz];
if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
(buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
@@ -102,7 +102,7 @@ int test_part_dos (block_dev_desc_t *dev_desc)
static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
int part_num)
{
unsigned char buffer[DEFAULT_SECTOR_SIZE];
unsigned char buffer[dev_desc->blksz];
dos_partition_t *pt;
int i;
@@ -166,7 +166,7 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
int relative, int part_num,
int which_part, disk_partition_t *info)
{
unsigned char buffer[DEFAULT_SECTOR_SIZE];
unsigned char buffer[dev_desc->blksz];
dos_partition_t *pt;
int i;