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

@@ -7126,14 +7126,14 @@ static void **io_alloc_page_table(size_t size)
 	size_t init_size = size;
 	void **table;
 
-	table = kcalloc(nr_tables, sizeof(*table), GFP_KERNEL);
+	table = kcalloc(nr_tables, sizeof(*table), GFP_KERNEL_ACCOUNT);
 	if (!table)
 		return NULL;
 
 	for (i = 0; i < nr_tables; i++) {
 		unsigned int this_size = min_t(size_t, size, PAGE_SIZE);
 
-		table[i] = kzalloc(this_size, GFP_KERNEL);
+		table[i] = kzalloc(this_size, GFP_KERNEL_ACCOUNT);
 		if (!table[i]) {
 			io_free_page_table(table, init_size);
 			return NULL;