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| author | Stefan Brüns <stefan.bruens@rwth-aachen.de> | 2016-12-17 00:27:50 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-12-27 11:24:13 -0500 |
| commit | 6c1a808052ba6a875df7aa450b6df4b199f3a281 (patch) | |
| tree | 92e632f3ade5970513c8e6058f3946196a19d98b /fs/fat/fat.c | |
| parent | c99d1b3ccf8d6fda809bb391da9cde86157cc4c9 (diff) | |
| download | u-boot-6c1a808052ba6a875df7aa450b6df4b199f3a281.tar.gz | |
fs/fat: Avoid corruption of sectors following the FAT
The FAT is read/flushed in segments of 6 (FATBUFBLOCKS) disk sectors. The
last segment may be less than 6 sectors, cap the length.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Diffstat (limited to 'fs/fat/fat.c')
| -rw-r--r-- | fs/fat/fat.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index df9f2b5656..6319581406 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -202,6 +202,7 @@ static __u32 get_fatent(fsdata *mydata, __u32 entry) __u32 fatlength = mydata->fatlength; __u32 startblock = bufnum * FATBUFBLOCKS; + /* Cap length if fatlength is not a multiple of FATBUFBLOCKS */ if (startblock + getsize > fatlength) getsize = fatlength - startblock; |