From patchwork Fri Aug 23 12:51:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 13775104 X-Patchwork-Delegate: jikos@jikos.cz Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 86094186607 for ; Fri, 23 Aug 2024 12:51:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724417496; cv=none; b=Y5AGLRS578pvw5OUHgeDXQnMk7xsObmbDMJo6MsKLuG1I/A3J5KQf2Sia/G8XMv/ywF80dY2GNmylFnJ7OiE5nSFXOswAuzbzGrS8+LH7KCj6fPof9co1zypv8EPVTRYyFIMrmTAl92lyGqdkOp7+77WTkWzjp7imu/+n8lNI4w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724417496; c=relaxed/simple; bh=TyzgdhWB7wc4Oocm7h8CUf5+ccWAlJpS6Qze8g7MVCg=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=WK4wcelQZCk1LWtH6BdIhr+Gc+decWvUQLoh7h+sKDv5l1By0y81PoDMvHXzGynBjqG7TcctT4zfBY07KdzRo86x5wzRREWfckEqVNtjRCY/fsHWlTY8NdhpQZnU3F7fjX1qZtwVJgV0ud30mI1LUXETaQvhx9cUiOGLCQyotYI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=KZoUL26R; arc=none smtp.client-ip=209.85.128.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="KZoUL26R" Received: by mail-wm1-f50.google.com with SMTP id 5b1f17b1804b1-42812945633so14876285e9.0 for ; Fri, 23 Aug 2024 05:51:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1724417492; x=1725022292; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=wxEehQwCYE19lD5kSpNMOUjLeWoaZ9JR6aNfHSrkYjI=; b=KZoUL26RujwmTqGbIfsLemWF7phJGhDTslGQ3umr6jdd2rNEEEtYfAsvxVZk34pO9Z MKElc6ZiPKwDsGSw2g8UrXgjL6pd8tx6S3Z+HqroQLtRxInxFC+roZpg6giiVO7QWhj/ L92RzZDXyTgX+gDzYYaVPCiyM510xGXiShr97QwfPx6ugU1U7ZbjIDjEGBQXghBZiUn2 Mv1Yan8wBxP9ewEx3BY6TiayRSp0lC2ZftwR0hbYopKTjL5gaGcmEWalSFkLwSOMsYy3 HGhbQRpTiZrwm6lrNvDyEdwTxAwBL+EdeLByeTfwK14/xLETd4JpWTNzqU8qH7L812sn UsZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724417492; x=1725022292; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=wxEehQwCYE19lD5kSpNMOUjLeWoaZ9JR6aNfHSrkYjI=; b=F7um4E3sKIvfAY0wfV4Wc22sUhAmyEl5M9IvJS/+bIr9nzVIsi5N2HgYvZAK9dlZbI Bit+xEQn8WNOJVeL4DbcShdfGZcN4BfCjLyaNPSI8gwoNGG30utL+409YV57WoHcFX3p 5kErHDHNqQO7lkv1Yv/g/FQqIHeYk+R1vVckyir5NLoESWP5mXl/y4jDxVz/pN6cwaH9 yq6tYlH2Nqs+ooXhG2celo3npJoXEraTz4bMxFSyt3Tp6/488YKKSiwciayDV/49Iqzi EKR72d1WUReoCa1Ky94oQCcalj7oYXua2GLpviu9PAwDy01Fh94AHgSQX/hcaPTlE/+K +sAQ== X-Forwarded-Encrypted: i=1; AJvYcCXKp26dKQotMF5AIrxuuXTWjGL1UK/MGe+xO3D0RuWTknoV6WA8sYmRcq7nvYjQZY/mV72rPVQBGQBuAQ==@vger.kernel.org X-Gm-Message-State: AOJu0Yzqql64g8v6Y2jgBPPeqsTX49of4d6j0D6LN7uohgMuG6tEDj7M Sso1BTwQ6cs71DYsDWRz6/vuaMu+t5ncUqjqGEqSZxmrsj1Fe6eRDjLZpr3E1QI5mYquG6DGUp0 ZmQD8uA== X-Google-Smtp-Source: AGHT+IFhHLlc095ixSKUu6CrmrIUdCI1EJL4zfC+W4OjuIo9Se2eQ/YR+U4xra16yh9krliC8NQqAg== X-Received: by 2002:a05:600c:470d:b0:426:6921:e3e5 with SMTP id 5b1f17b1804b1-42acc9fe1e7mr16108185e9.24.1724417491866; Fri, 23 Aug 2024 05:51:31 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3730815b7e3sm4095492f8f.53.2024.08.23.05.51.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Aug 2024 05:51:31 -0700 (PDT) Date: Fri, 23 Aug 2024 15:51:27 +0300 From: Dan Carpenter To: Charles Wang Cc: Jiri Kosina , Benjamin Tissoires , Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH next] HID: hid-goodix: Fix a signedness bug in goodix_hid_get_raw_report() Message-ID: <8e6fe9f1-fcd8-4264-b28d-a1ee99b592b8@stanley.mountain> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding GOODIX_HID_PKG_LEN_SIZE defined as sizeof(u16) (type size_t). If the goodix_hid_check_ack_status() function times out and return -EINVAL then, because of type promotion, the negative error code is treated as a high positive value which is success. Fix this by adding an explicit check for negative error codes. Fixes: 75e16c8ce283 ("HID: hid-goodix: Add Goodix HID-over-SPI driver") Signed-off-by: Dan Carpenter --- drivers/hid/hid-goodix-spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-goodix-spi.c b/drivers/hid/hid-goodix-spi.c index 5103bf0aada4..59415f95c675 100644 --- a/drivers/hid/hid-goodix-spi.c +++ b/drivers/hid/hid-goodix-spi.c @@ -435,7 +435,8 @@ static int goodix_hid_get_raw_report(struct hid_device *hid, /* Step2: check response data status */ response_data_len = goodix_hid_check_ack_status(ts); - if (response_data_len <= GOODIX_HID_PKG_LEN_SIZE) + if (response_data_len < 0 || + response_data_len <= GOODIX_HID_PKG_LEN_SIZE) return -EINVAL; len = min(len, response_data_len - GOODIX_HID_PKG_LEN_SIZE);