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| author |   Darrick J. Wong <darrick.wong@oracle.com> | 2018-10-30 10:40:22 +1100 |
|---|---|---|
| committer |   Dave Chinner <david@fromorbit.com> | 2018-10-30 10:40:22 +1100 |
| commit | 5b49f64db299d0b3f7c2170088186aa593d0be7d (patch) | |
| tree | ed7559be897c3e12da7719f6d278e29528d3af90 /fs/read_write.c | |
| parent | Linux 4.19 (diff) | |
| download | wireguard-linux-5b49f64db299d0b3f7c2170088186aa593d0be7d.tar.xz wireguard-linux-5b49f64db299d0b3f7c2170088186aa593d0be7d.zip | |
vfs: vfs_clone_file_prep_inodes should return EINVAL for a clone from beyond EOF
vfs_clone_file_prep_inodes cannot return 0 if it is asked to remap from
a zero byte file because that's what btrfs does.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 8a2737f0d61d..260797b01851 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1740,10 +1740,7 @@ int vfs_clone_file_prep_inodes(struct inode *inode_in, loff_t pos_in, if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode)) return -EINVAL; - /* Are we going all the way to the end? */ isize = i_size_read(inode_in); - if (isize == 0) - return 0; /* Zero length dedupe exits immediately; reflink goes to EOF. */ if (*len == 0) { |