io_uring: place fixed tables under memcg limits

commit 0bea96f upstream.

Fixed tables may be large enough, place all of them together with
allocated tags under memcg limits.

Cc: stable@vger.kernel.org
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b3ac9f5da9821bb59837b5fe25e8ef4be982218c.1629451684.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/io_uring.c

@@ -7383,7 +7383,7 @@ static int io_sqe_alloc_file_tables(struct fixed_file_data *file_data,
 
 		this_files = min(nr_files, IORING_MAX_FILES_TABLE);
 		table->files = kcalloc(this_files, sizeof(struct file *),
-					GFP_KERNEL);
+					GFP_KERNEL_ACCOUNT);
 		if (!table->files)
 			break;
 		nr_files -= this_files;
@@ -7582,7 +7582,7 @@ static int io_sqe_files_register(struct io_ring_ctx *ctx, void __user *arg,
 	if (nr_args > rlimit(RLIMIT_NOFILE))
 		return -EMFILE;
 
-	file_data = kzalloc(sizeof(*ctx->file_data), GFP_KERNEL);
+	file_data = kzalloc(sizeof(*ctx->file_data), GFP_KERNEL_ACCOUNT);
 	if (!file_data)
 		return -ENOMEM;
 	file_data->ctx = ctx;
@@ -7592,7 +7592,7 @@ static int io_sqe_files_register(struct io_ring_ctx *ctx, void __user *arg,
 
 	nr_tables = DIV_ROUND_UP(nr_args, IORING_MAX_FILES_TABLE);
 	file_data->table = kcalloc(nr_tables, sizeof(*file_data->table),
-				   GFP_KERNEL);
+				   GFP_KERNEL_ACCOUNT);
 	if (!file_data->table)
 		goto out_free;