Commit d5bfccdf authored Oct 03, 2016 by Christoph Hellwig Committed by Dave Chinner Oct 03, 2016

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>

parent 25f4e702

fs/ext2/inode.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;