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block: use bdev_nr_bytes instead of open coding it in blkdev_fallocate 

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20211018101130.1838532-25-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-18 12:11:24 +02:00 committed by Jens Axboe
parent be9a7b3e15
commit 2a93ad8fcb
1 changed files with 1 additions and 1 deletions
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2
block/fops.c
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@ -535,7 +535,7 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start,
return -EOPNOTSUPP;
/* Don't go off the end of the device. */
isize = i_size_read(bdev->bd_inode);
isize = bdev_nr_bytes(bdev);
if (start >= isize)
return -EINVAL;
if (end >= isize) {