linux-kernel - Re: [PATCH] hid: fix I2C read buffer overflow in raw

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Message-Id: <175507820752.20076.8458113244883958100.b4-ty@kernel.org>
Date: Wed, 13 Aug 2025 11:43:27 +0200
From: Benjamin Tissoires <bentiss@...nel.org>
To: Rishi Gupta <gupt21@...il.com>, Arnaud Lecomte <contact@...aud-lcm.com>
Cc: Jiri Kosina <jikos@...nel.org>, linux-i2c@...r.kernel.org, 
 linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, 
 syzbot+52c1a7d3e5b361ccd346@...kaller.appspotmail.com
Subject: Re: [PATCH] hid: fix I2C read buffer overflow in raw_event() for
 mcp2221

On Sat, 26 Jul 2025 23:09:31 +0100, Arnaud Lecomte wrote:
> As reported by syzbot, mcp2221_raw_event lacked
> validation of incoming I2C read data sizes, risking buffer
> overflows in mcp->rxbuf during multi-part transfers.
> As highlighted in the DS20005565B spec, p44, we have:
> "The number of read-back data bytes to follow in this packet:
> from 0 to a maximum of 60 bytes of read-back bytes."
> This patch enforces we don't exceed this limit.
> 
> [...]

Applied to hid/hid.git (for-6.17/upstream-fixes), thanks!

[1/1] hid: fix I2C read buffer overflow in raw_event() for mcp2221
      https://git.kernel.org/hid/hid/c/b56cc41a3ae7

Cheers,
-- 
Benjamin Tissoires <bentiss@...nel.org>