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From: Andi Shyti <andi.shyti@kernel.org>
To: Christian Marangi <ansuelsmth@gmail.com>
Cc: Stefan Roese <sr@denx.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	 AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>,
	Wolfram Sang <wsa@kernel.org>,
	linux-i2c@vger.kernel.org,  linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	 linux-mediatek@lists.infradead.org
Subject: Re: [PATCH RESEND] i2c: mt7621: fix copying uninitialized kernel stack with reduced page_len
Date: Fri, 23 Oct 2026 18:19:41 +0200	[thread overview]
Message-ID: <atuI-J9c7PXTqdCN@zenone.zhora.eu> (raw)
In-Reply-To: <20261022193853.670625-1-ansuelsmth@gmail.com>

Hi Christian,

On Thu, Oct 22, 2026 at 09:38:51PM +0200, Christian Marangi wrote:
> When a page_len is less than 5 bytes in mtk_i2c_xfer, uninitialized kernel
> stack data is copied and written to REG_SM0D1_REG. Equally on the read
> part, an unnecessary read is done.
> 
> Guard these extra copy/write and read for the page_len to fix leaking
> uninitialized stack memory.
> 
> Fixes: d04913ec5f89 ("i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver")
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

pushed to i2c/i2c.

Thanks,
Andi


  reply	other threads:[~2026-10-23 16:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-22 19:38 [PATCH RESEND] i2c: mt7621: fix copying uninitialized kernel stack with reduced page_len Christian Marangi
2026-10-23 16:19 ` Andi Shyti [this message]
2026-10-26 22:59 ` Andi Shyti
2026-10-26 23:03   ` Christian Marangi (Ansuel)

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