[PATCH 2/6] io_uring/rsrc: use get/put_user() for integer copy

[Jens Axboe <axboe@kernel.dk>]

It's just getting an integer from userspace, installing a file, then
copying the output direct descriptor back. No need to use the full
copy_to/from_user() for that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 io_uring/rsrc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index d787c16dc1c3..4cc38eb56758 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -454,7 +454,7 @@ static int io_files_update_with_index_alloc(struct io_kiocb *req,
 		return -ENXIO;
 
 	for (done = 0; done < up->nr_args; done++) {
-		if (copy_from_user(&fd, &fds[done], sizeof(fd))) {
+		if (get_user(fd, &fds[done])) {
 			ret = -EFAULT;
 			break;
 		}
@@ -468,7 +468,7 @@ static int io_files_update_with_index_alloc(struct io_kiocb *req,
 					  IORING_FILE_INDEX_ALLOC);
 		if (ret < 0)
 			break;
-		if (copy_to_user(&fds[done], &ret, sizeof(ret))) {
+		if (put_user(ret, &fds[done])) {
 			__io_close_fixed(req->ctx, issue_flags, ret);
 			ret = -EFAULT;
 			break;
-- 
2.51.0