Received: by 2002:ab2:6857:0:b0:1ef:ffd0:ce49 with SMTP id l23csp1657490lqp; Sat, 23 Mar 2024 03:42:33 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCXPWCa3c9P8cQDW/zjNsCjdsuRFbgZ2S0UC9HUfRHVNf6bG8wW3yr0HRj5HoD9PYqKuXAc3FeHPnSSLs0V1vnRF5RXjOKRwYTemzvnksQ== X-Google-Smtp-Source: AGHT+IG2Rk1lHL9xJ7/nqRt/sckdgXheL1/Fs5QyPDVfwWCdXbosxNVL4hC6qz3ybF4dRwM623nz X-Received: by 2002:a05:6870:e389:b0:229:7fa8:f4c4 with SMTP id x9-20020a056870e38900b002297fa8f4c4mr2419925oad.36.1711190553605; Sat, 23 Mar 2024 03:42:33 -0700 (PDT) Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [139.178.88.99]) by mx.google.com with ESMTPS id s25-20020a056a00179900b006e6cc7b96a5si1455781pfg.60.2024.03.23.03.42.33 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Mar 2024 03:42:33 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-112298-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@chromium.org header.s=google header.b=Tv2f5+uB; arc=fail (body hash mismatch); spf=pass (google.com: domain of linux-kernel+bounces-112298-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-112298-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 3C22428287D for ; Sat, 23 Mar 2024 10:42:33 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 223732942A; Sat, 23 Mar 2024 10:41:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Tv2f5+uB" Received: from mail-qv1-f50.google.com (mail-qv1-f50.google.com [209.85.219.50]) (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 B399D17585 for ; Sat, 23 Mar 2024 10:41:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711190514; cv=none; b=riYfS3bVmp9U330PtKxB7iDhzcJhKZuYq6i2Usfg9CWuy5qC8qh2Ol1sMpKhSNdbCd/igA35wl+kSnUboW8amjVrJaRtDdK6Qi538VJ2emd7zoYhcpl+644nMBzHmyaL2MasN3wBjLT3q/v6GAfclYuLRUCcUsbS+usne2xGXnc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711190514; c=relaxed/simple; bh=GEI/ooPR1uxzhyNgwywp7m8zeQWCBAmFv9ShGuGC3WM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=T8cN4zKpPiqkvgEz0tTyZjkwh06Dls1UdyI6DhkT1jH7XSNNDpRgxVAeR/gUK0sbrCrscmE1UP4NcFiDkvxi94f0L8+n7GJ3udhYQAuAy9injgGmLjJwDi2WFkz3nqWVYdVkgU9yV4F5dO+L45VELDhK5hioIF7vxyuj6tTyka4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=Tv2f5+uB; arc=none smtp.client-ip=209.85.219.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Received: by mail-qv1-f50.google.com with SMTP id 6a1803df08f44-69107859bedso20060986d6.2 for ; Sat, 23 Mar 2024 03:41:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1711190512; x=1711795312; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=MqD8wzexo6xit6zjT25NUCdriPsphWfFfa0tlNyYYks=; b=Tv2f5+uBv93MVvRfoVm2O8kRG3mojEdZIlp7HnN6hdomSBgI5qeTE6TyG4kC/jfqBU 2Sw7By4TEqxXtjDSv1l3JagA9pvPfZw2BZkEyT1AqkwPtYojstR/N63qiDXbCm7SsPSr SD3r57QbWIjksbhZEnhEW4sL3nziVVZ41ZPVk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711190512; x=1711795312; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MqD8wzexo6xit6zjT25NUCdriPsphWfFfa0tlNyYYks=; b=bZEIdUb+g8AWn6n0U3FjHW0OZv+im6ALwxYEKFi+e+j4L/D4QwWQAVAfwYv1u2sr22 ZnTW8T4nVkFsgABBNY2Kwkv320lf8myptTwMmzrjQgJKXeDqwXViFVfuZaBw9CQDT7Gr xdlEhbb/fOsMdGm07Ajdn9q8Zbgn2CRUF7quNrLefDVBHSWxK7CkcrW9C5gKjgV9KQqk k3c6qiFa+y5zjFdJZKpUjvQOmpyjgJ4vQM/VvN57xw5HayF61a9WHa3xPYOf+c+SMuCc jZYb9PZMcq2SvN9G3yhrYiXtRlox+9jj3w/AyBtzEugi7kSkRB6SXuf3ARe5JaNqFLeC qz6g== X-Forwarded-Encrypted: i=1; AJvYcCUyUML4FOrNdh45DS+e+x/lMhV5XGjmM6XaKXIB0KAdNY+kaOzNoHiWfOSxoITGC8oeoPVW3ndVwgH5pmSeBnqEB9srV3XqiQ3IIqjv X-Gm-Message-State: AOJu0YxsVSUf+KdAhwoL/8YJMHeE1YVC6qDm19x3CaGWDTEW7lZ6iyjE HcV8IzFp6qJlYnul4gP4r8GILr9A317MF+UXoqBsGRmJD4tcqiRZDwGHGUaQvQ== X-Received: by 2002:a05:6214:2249:b0:690:c093:d833 with SMTP id c9-20020a056214224900b00690c093d833mr2314782qvc.0.1711190511851; Sat, 23 Mar 2024 03:41:51 -0700 (PDT) Received: from denia.c.googlers.com (188.173.86.34.bc.googleusercontent.com. [34.86.173.188]) by smtp.gmail.com with ESMTPSA id 6-20020a0562140d4600b0068f75622543sm1998523qvr.1.2024.03.23.03.41.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Mar 2024 03:41:51 -0700 (PDT) From: Ricardo Ribalda Date: Sat, 23 Mar 2024 10:41:47 +0000 Subject: [PATCH 3/3] media: dvbdev: Initialize sbuf Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20240323-gcc-arm-warnings-v1-3-0b45cc52f39e@chromium.org> References: <20240323-gcc-arm-warnings-v1-0-0b45cc52f39e@chromium.org> In-Reply-To: <20240323-gcc-arm-warnings-v1-0-0b45cc52f39e@chromium.org> To: Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Luca Ceresoli , Mauro Carvalho Chehab , Greg Kroah-Hartman , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.12.4 Because the size passed to copy_from_user() cannot be known beforehand, it needs to be checked during runtime with check_object_size. That makes gcc believe that the content of sbuf can be used before init. Fix: /include/linux/thread_info.h:215:17: warning: ‘sbuf’ may be used uninitialized [-Wmaybe-uninitialized] Signed-off-by: Ricardo Ribalda --- drivers/media/dvb-core/dvbdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c index 733d0bc4b4cc3..b43695bc51e75 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -956,7 +956,7 @@ int dvb_usercopy(struct file *file, int (*func)(struct file *file, unsigned int cmd, void *arg)) { - char sbuf[128]; + char sbuf[128] = {}; void *mbuf = NULL; void *parg = NULL; int err = -EINVAL; -- 2.44.0.396.g6e790dbe36-goog