linux-hardening - Re: [PATCH][next] mlxsw: spectrum_kvdl: Use struct

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Date:   Wed, 26 Jan 2022 09:54:32 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] mlxsw: spectrum_kvdl: Use struct_size() helper in
 kzalloc()

On Tue, Jan 25, 2022 at 11:01:28AM -0600, Gustavo A. R. Silva wrote:
> Make use of the struct_size() helper instead of an open-coded version,
> in order to avoid any potential type mistakes or integer overflows that,
> in the worst scenario, could lead to heap overflows.
> 
> Also, address the following sparse warnings:
> drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c:229:24: warning: using sizeof on a flexible structure
> 
> Link: https://github.com/KSPP/linux/issues/174
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Reviewed-by: Ido Schimmel <idosch@...dia.com>

Thanks