From: Pavel Begunkov <asml.silence@gmail.com>
Date: Wed, 6 Apr 2022 11:43:57 +0000 (+0100)
Subject: io_uring: nospec index for tags on files update
X-Git-Tag: v6.1-rc5~1587^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=34bb77184123ae401100a4d156584f12fa630e5c;p=platform%2Fkernel%2Flinux-starfive.git

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: c3bdad0271834 ("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 a88eca3..b517fd9 100644
--- 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) {