io_uring: nospec index for tags on files update

Don't forget to array_index_nospec() for indexes before updating rsrc
tags in __io_sqe_files_update(), just use already safe and precalculated
index @i.

Fixes: 3472b362d1257 ("io_uring: add generic rsrc update with tags")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index a88eca3e0902a706ae97d5422e2f91335dbae1ef..b517fd9c3f6001940568734e5854f7d866a164e3 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -9094,7 +9094,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
                                err = -EBADF;
                                break;
                        }
-                       *io_get_tag_slot(data, up->offset + done) = tag;
+                       *io_get_tag_slot(data, i) = tag;
                        io_fixed_file_set(file_slot, file);
                        err = io_sqe_file_register(ctx, file, i);
                        if (err) {