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=1794061933; b=TZ4vOEZOA2myU200dBv/8+KO8QAKSGjgSqi9hvNjNXPe+oygKma7b4qv2JufJMJSNFRu NAInJSc9sN8GJbTNYZWMgl1eWY/uzOMq0C8zEHkWNYBATuIWOEHCSXZd2MT5EpQoqRfur XoGKoJJnG59HBmiaXImKKsCfJvQUuqydkJCmMJa9l8byBHfAbb3DeCfrcWENdCctMAQx9 X/X1G6Misdo9pEyiST/lhWtQxKHMD8J+68CfXXnQtVOEk4MxV0YBG/uJ/IqQ+USLtrTk/ yrNxgxEYxzWebRhce0/F/ven2yIfpkboVxbH6rvXALZgoSFonOt/87i9HmL2NYlyabQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794061933; 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=heAuVQhA5b0M2COh0DerVdPwRAbZNO0zx8+nSSo0/XY=; b=uAQQuIN4MsIMdqu3/jYOBjN3JNnqYkDFsP2i1MXtGsUHA+COqNjLO/l2T8zAVWUx3T1o 3tK3KwlWpoKni6hMO5a2lCDIExy/cD6nSu0AMJFRLaM4odqxsZ8JXQbxsN2oeAOTtnqFT imkQEq39RIbIXvoIGJwmG/3uKUvLvG5GRHBYNSJnPCOarpW4vME9OcFaLRojJNj1S/5Wu fgbtUVOjfhYCU8T86B7y+VDQDncyrLi75iAktXE3T2gZajfP2uMb8QrlLznrcDRjehWhd zWgYlnMm0C6gtf2ZsdK/Of5WwWU2mBoBD1ex3TiGP4pOQOrIsrFKdTPUzHAcsxmIRCg== 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=uPu67N5c; 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 1DEFD606A326; Sat, 7 Nov 2026 14:32:13 +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=uPu67N5c Received: by smtp.kernel.org (Postfix) with ESMTPSA id C05591F0089F; Sat, 7 Nov 2026 14:32:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794061933; bh=heAuVQhA5b0M2COh0DerVdPwRAbZNO0zx8+nSSo0/XY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=uPu67N5cNs2RIgNdPl0Y6fZtGfbvxql1+PT1pAxv+Zj+P+0HwacBdMIhbmbxXn+qG JVZCKZU14xGj2wr5PFQ1zZDs16JJ7TfIrb8inLBCqJmPvgLgylbzx5Kw4n3H697lKZ AReZv0g6VxuDWIvEDI0PZ+QmAAU9er8scZKitHEg= 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 6.12 0936/1536] media: go7007: bound EZ-USB I2C transfers to the usb_buf size Date: Sat, 7 Nov 2026 08:49:12 -0500 Message-ID: <20261107135023.940636234@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@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 6.12-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