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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>
This commit is contained in:
Christoph Hellwig 2016-10-03 09:46:04 +11:00 committed by Dave Chinner
parent 25f4e70291
commit d5bfccdf38
1 changed files with 1 additions and 1 deletions
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2
fs/ext2/inode.c
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@ -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;