linux-hardening - Re: [PATCH][next] usb: xhci-mtk: Use struct_size() helper in create_sch

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Message-ID: <1e41c2fe-38b2-e7db-ec71-cab1abb708f3@collabora.com>
Date:   Mon, 24 Jan 2022 10:26:18 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] usb: xhci-mtk: Use struct_size() helper in
 create_sch_ep()

Il 20/01/22 02:55, Gustavo A. R. Silva ha scritto:
> 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/usb/host/xhci-mtk-sch.c:265:20: warning: using sizeof on a flexible structure
> 
> Link: https://github.com/KSPP/linux/issues/160
> Link: https://github.com/KSPP/linux/issues/174
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> Acked-by: Chunfeng Yun <chunfeng.yun@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>