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| author | Aaron Williams <aaron.williams@caviumnetworks.com> | 2012-05-19 07:20:40 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-05-22 10:14:05 +0200 |
| commit | 1d90c3b457a64aa339aa900199e519ff08440778 (patch) | |
| tree | 87ef15113c732a1c73d0ec885d7edcc48fd161e5 | |
| parent | a075a79f98cc3f5972a2ed80551c0873217aef7d (diff) | |
| download | u-boot-imx-1d90c3b457a64aa339aa900199e519ff08440778.zip u-boot-imx-1d90c3b457a64aa339aa900199e519ff08440778.tar.gz u-boot-imx-1d90c3b457a64aa339aa900199e519ff08440778.tar.bz2 | |
fat: fix FAT sector offsets overflow on large FAT partitions
This patch fixes several issues where sector offsets can overflow due
to being limited to 16-bits. The cases where an overflow can happen
when accessing large FAT32 partitions are:
- length of FAT in sectors
- start sector of root directory
- the sector of the first cluster
These issues were observed when reading files from a 64GB FAT32
filesystem.
Signed-off-by: Aaron Williams <aaron.williams@caviumnetworks.com>
Tested-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
| -rw-r--r-- | include/fat.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/fat.h b/include/fat.h index 4c92442..f1b4a0d 100644 --- a/include/fat.h +++ b/include/fat.h @@ -178,12 +178,12 @@ typedef struct dir_slot { typedef struct { __u8 *fatbuf; /* Current FAT buffer */ int fatsize; /* Size of FAT in bits */ - __u16 fatlength; /* Length of FAT in sectors */ + __u32 fatlength; /* Length of FAT in sectors */ __u16 fat_sect; /* Starting sector of the FAT */ - __u16 rootdir_sect; /* Start sector of root directory */ + __u32 rootdir_sect; /* Start sector of root directory */ __u16 sect_size; /* Size of sectors in bytes */ __u16 clust_size; /* Size of clusters in sectors */ - short data_begin; /* The sector of the first cluster, can be negative */ + int data_begin; /* The sector of the first cluster, can be negative */ int fatbufnum; /* Used by get_fatent, init to -1 */ } fsdata; |