According to `man 2 copy_file_range`, EINVAL should be returned if the "requested range extends beyond the end of the source file". Falling back on do_splice_direct() will return 0 in this case, so let's add an explicit check to match the behavior documented in the man page. Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx> --- fs/read_write.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/read_write.c b/fs/read_write.c index 66215a7..1cbab4e 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1497,6 +1497,9 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, if (unlikely(ret)) return ret; + if (pos_in >= i_size_read(inode_in)) + return -EINVAL; + if (!(file_in->f_mode & FMODE_READ) || !(file_out->f_mode & FMODE_WRITE) || (file_out->f_flags & O_APPEND)) -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
