Re: [Intel-wired-lan] [PATCH] ice: parser: use array_size() for table allocation

[Alexander Lobakin <aleksander.lobakin@intel.com>]

From: Weimin Xiong <xiongwm2026@163.com>
Date: Thu, 16 Jul 2026 10:51:00 +0800

> Use array_size() when calculating the parser table allocation size so an
> overflow in the firmware-provided item dimensions is detected before
> allocation. Include the overflow helpers explicitly instead of relying on
> an indirect include.
> 
> Signed-off-by: Weimin Xiong <xiongwm2026@163.com>
> ---
> diff --git a/drivers/net/ethernet/intel/ice/ice_parser.c b/drivers/net/ethernet/intel/ice/ice_parser.c
> index f8e69630f..c109d3c32 100644
> --- a/drivers/net/ethernet/intel/ice/ice_parser.c
> +++ b/drivers/net/ethernet/intel/ice/ice_parser.c
> @@ -1,6 +1,8 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright (C) 2024 Intel Corporation */
>  
> +#include <linux/overflow.h>

This is redundant.

> +
>  #include "ice_common.h"
>  
>  struct ice_pkg_sect_hdr {
> @@ -102,7 +104,7 @@ ice_parser_create_table(struct ice_hw *hw, u32 sect_type,
>  	if (!seg)
>  		return ERR_PTR(-EINVAL);
>  
> -	table = kzalloc(item_size * length, GFP_KERNEL);
> +	table = kzalloc(array_size(item_size, length), GFP_KERNEL);

kcalloc(length, item_size) if you want to make it _proper_.

array_size() is used only when no array allocation helpers are
available, e.g. for dma_alloc_coherent(). For regular slab allocations,
we have a whole bunch of different array allocation helpers.

>  	if (!table)
>  		return ERR_PTR(-ENOMEM);

Thanks,
Olek