From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4BF6C77B73 for ; Mon, 22 May 2023 15:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234543AbjEVPwU (ORCPT ); Mon, 22 May 2023 11:52:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231409AbjEVPwS (ORCPT ); Mon, 22 May 2023 11:52:18 -0400 Received: from mail-il1-x130.google.com (mail-il1-x130.google.com [IPv6:2607:f8b0:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A1C2F9; Mon, 22 May 2023 08:52:14 -0700 (PDT) Received: by mail-il1-x130.google.com with SMTP id e9e14a558f8ab-3318961b385so9994175ab.1; Mon, 22 May 2023 08:52:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1684770733; x=1687362733; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=7sLAS1re4t0jepnvIMkPI23rNpmWLJZtcQVM+U6RF+I=; b=UGRRnuJymzcFEIgOt1c7jWHGtoRQnT32sQuU0zmMQB1tSkJcX4XXJ3W0th1d0drxkE ESQ96vRX9bqIW8Tg01BrHzsKLYQJZySPkmz6HWnGaywLPa0ahg4F6Gi42DZEbJxpFAzh iE2qubB1+HAqi0VefqWciMtMiaYqbtLY6lX5S/enNs86b8+HTJbtShyvpqpJF9PxNovG lYd4wk0gStVIfBgcTuBkUmakTnhhxpTABaGBvM/lk6ZyheGJDw0hOWL4OmqqN0RQobuR pyHn9gP98T8eVK4ZAstf8SfAgiaBHiRHznOyRHx8x+TR9a/WRhqxPxwIrF+gB5EiCWnM wSmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684770733; x=1687362733; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=7sLAS1re4t0jepnvIMkPI23rNpmWLJZtcQVM+U6RF+I=; b=VdKhywX6nwlBj1iWQ5ZZNmnu8nM9zH3cnEFhZ41lxRsHyWuwskyKti0ShBFShHnlJ3 dHUjsIdmHNlzk5rjBPqDUIszXUz0Q2ZXWB0SS34EOIEWi77EeEhEkxh+UEbLj4agIt0b KJb/Wwi6zkgZMQLjDwQb8e8p7rdX1irbHjgHaxbXQVaKxuXts5D4QYH7cYV0vRks9xKn vHNRxSyCtzzixbDDr3eMfwImBzbMCsXQksB23bVFZ59HD5JYq9WeAhbRYy1Jxs886O+H j0rIPhdfghNLGzw1uRs0BSdMnnLQ7v/JwEA2xidpnRtYgsLHUdV2qeVpnEigc1mc8Qwh YMsA== X-Gm-Message-State: AC+VfDx8xUWwOXRJTFJMvT5b4jnvVwqqA00JYeB5X6mMl7Yy5pcmVUBH fK5LCM4gWZ1Th1E7Re6G8E8= X-Google-Smtp-Source: ACHHUZ7x7GRL661Xm6U+t9Prayc8EdalxBRBQSJ1Esy+V4Z78cjwoFzpNSmy+Zh4M/L/Kv3wz1ocIw== X-Received: by 2002:a92:db08:0:b0:338:65fc:f4c1 with SMTP id b8-20020a92db08000000b0033865fcf4c1mr6987356iln.9.1684770733275; Mon, 22 May 2023 08:52:13 -0700 (PDT) Received: from azeems-kspp.c.googlers.com.com (54.70.188.35.bc.googleusercontent.com. [35.188.70.54]) by smtp.gmail.com with ESMTPSA id bs21-20020a056638451500b0040bd3646d0dsm1794208jab.157.2023.05.22.08.52.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 May 2023 08:52:12 -0700 (PDT) From: Azeem Shaikh To: Andrzej Hajda , Neil Armstrong , Robert Foss Cc: linux-hardening@vger.kernel.org, Azeem Shaikh , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , linux-kernel@vger.kernel.org, David Airlie , Daniel Vetter , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Maxime Ripard , Lucas Stach , Guillaume BRUN , dri-devel@lists.freedesktop.org Subject: [PATCH] drm/bridge: dw-hdmi: Replace all non-returning strlcpy with strscpy Date: Mon, 22 May 2023 15:52:10 +0000 Message-ID: <20230522155210.2336690-1-azeemshaikh38@gmail.com> X-Mailer: git-send-email 2.40.1.698.g37aff9b760-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 603bb3c51027..9d6dcaf317a1 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -533,7 +533,7 @@ static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi) adap->owner = THIS_MODULE; adap->dev.parent = hdmi->dev; adap->algo = &dw_hdmi_algorithm; - strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name)); + strscpy(adap->name, "DesignWare HDMI", sizeof(adap->name)); i2c_set_adapdata(adap, hdmi); ret = i2c_add_adapter(adap);