From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794062782; b=C7lcM9TTqcGvgTuWINCMecEtxg4GyKUqEppWcO6rhpWTxq6fF2Mw3KKnxeU4YKDLrEEf S0dX8eUHb90h5BIjqLOyUdu9gUHwScxaofx2LCjXmzCS9jEeit6OdHSAV+nHUxXMmsDjC 3k0z/K66zFiTOA/obAVpNkVL8qgF9PrGLi+dwkkpsKdgVrycky8rvmLpxPguAXCzZ/sWl ClgFoGHIu76E7J2EwpwRQcKPRIqtq+9zLjg3LzNsYV0+M8mx4bKT+yIC4fgBK3/DzAPWi iV3gWCeO8vZSci3hPHCbIXk4Ze+T7D8h5sMBg+MN0AruZal/+xHnMbFMB6w+jM1j+Sw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794062782; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=WEl1Av/jc0hQtWhTXB24JQUkbD7z+WbtTrO0Fh3s5PE=; b=hHTjs//ymBDxhAh1qVVQNTSyJoeLJpRZ/lg8qLwMdfnVRMj4uHRgfpvj9qjWije4kHsX 3ye6QbSt4e8D1cJ/5mgkdtWVy3sClykRSFEsgoIMaf767OHp92ZtH/LFL6l+cp38TxXoI ps6xlDIsOZh/pnXy+6/GOGpVEAEXAj4/a0u08vIMMawAFrXUX8CjVZSUjy0avYn7KScQK 4XRieJb6w19ZjFVZ6uuzg7FS3qPa1oJaxi4kQ+hOMeZzhHz9+Ng8UU6HTblxznXNSnO+t sKDdXfyyUkAo7NOQM9+XRR2c8wJepcQY7TM14ogQd9gHwZkUX36OauR+UCeKb8d7qhA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=wdrTF8bC; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 87D18606A326; Sat, 7 Nov 2026 14:46:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=wdrTF8bC Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31C251F0089F; Sat, 7 Nov 2026 14:46:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794062782; bh=WEl1Av/jc0hQtWhTXB24JQUkbD7z+WbtTrO0Fh3s5PE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=wdrTF8bCTqvNciciKOKmNIPN4WcZPmjXSAEMtC9apVBRPRLBIqZvi9eT4TaBw8khB UnOuQUKpE2BRuVkyjyS4DhcZjX9ku98c31UYkItBJYTxsu5tkz5CVa9nHV6+jwujL4 dKC1Inf06bvAQ+tJJAxrpGli1KUA5jr4dkfhqDmM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shengzhuo Wei , Hans Verkuil , Sasha Levin Subject: [PATCH 6.18 082/869] media: go7007: bound EZ-USB I2C transfers to the usb_buf size Date: Sat, 7 Nov 2026 08:46:04 -0500 Message-ID: <20261107134855.486593416@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shengzhuo Wei [ Upstream commit 816c4628b23e8c3d925978433f4dd1a13620c01b ] go7007_usb_i2c_master_xfer() copies msgs[i].len bytes into go->usb_buf, a 16-byte buffer embedded in struct go7007, without any length check. The adapter declares no transfer limits, so an SMBus block transfer issued through /dev/i2c-N can write up to 34 bytes into it and corrupt the struct fields that follow the buffer. Bound the transfer size with i2c_adapter_quirks so the I2C core rejects oversized messages before they reach the driver. Fixes: 7955f03d18d1 ("[media] go7007: move out of staging into drivers/media/usb.") Cc: stable@vger.kernel.org Signed-off-by: Shengzhuo Wei Assisted-by: GLM:5.3 Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/usb/go7007/go7007-usb.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/media/usb/go7007/go7007-usb.c b/drivers/media/usb/go7007/go7007-usb.c index 334cdde81a5c8..bf3cf320b2c9c 100644 --- a/drivers/media/usb/go7007/go7007-usb.c +++ b/drivers/media/usb/go7007/go7007-usb.c @@ -1029,10 +1029,16 @@ static const struct i2c_algorithm go7007_usb_algo = { .functionality = go7007_usb_functionality, }; +static const struct i2c_adapter_quirks go7007_usb_quirks = { + .max_write_len = 12, + .max_read_len = 15, +}; + static struct i2c_adapter go7007_usb_adap_templ = { .owner = THIS_MODULE, .name = "WIS GO7007SB EZ-USB", .algo = &go7007_usb_algo, + .quirks = &go7007_usb_quirks, }; /********************* USB add/remove functions *********************/ -- 2.53.0