startblock must be taken into account in order not to read past the end of the FAT.
Signed-off-by: Benoît Thébaudeau benoit.thebaudeau@advansee.com Cc: Wolfgang Denk wd@denx.de --- .../fs/fat/fat.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git u-boot-66714b1.orig/fs/fat/fat.c u-boot-66714b1/fs/fat/fat.c index bc46cc5..f6fd457 100644 --- u-boot-66714b1.orig/fs/fat/fat.c +++ u-boot-66714b1/fs/fat/fat.c @@ -207,8 +207,8 @@ static __u32 get_fatent (fsdata *mydata, __u32 entry) __u32 fatlength = mydata->fatlength; __u32 startblock = bufnum * FATBUFBLOCKS;
- if (getsize > fatlength) - getsize = fatlength; + if (startblock + getsize > fatlength) + getsize = fatlength - startblock;
fatlength *= mydata->sect_size; /* We want it in bytes now */ startblock += mydata->fat_sect; /* Offset from start of disk */