diff options
| author |   Christoph Hellwig <hch@lst.de> | 2016-10-03 09:46:04 +1100 |
|---|---|---|
| committer |   Dave Chinner <david@fromorbit.com> | 2016-10-03 09:46:04 +1100 |
| commit | d5bfccdf38d094f2b15fae8b361d7bd47f2509d6 (patch) | |
| tree | 37d47bc6f016d5312faa9ccbd56da082b9835a75 /fs/ext2 | |
| parent | ext2: use iomap to implement DAX (diff) | |
| download | linux-dev-d5bfccdf38d094f2b15fae8b361d7bd47f2509d6.tar.xz linux-dev-d5bfccdf38d094f2b15fae8b361d7bd47f2509d6.zip | |
ext2: fix possible integer truncation in ext2_iomap_begin
For 32-bit architectures we need to cast first_block to u64 before
shifting it left.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/ext2')
| -rw-r--r-- | fs/ext2/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index aae5f61f980b..c7dbb4661119 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -806,7 +806,7 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length, iomap->flags = 0; iomap->bdev = inode->i_sb->s_bdev; - iomap->offset = first_block << blkbits; + iomap->offset = (u64)first_block << blkbits; if (ret == 0) { iomap->type = IOMAP_HOLE; |