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 5614CC41535 for ; Wed, 30 Mar 2022 12:15:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345855AbiC3MPH (ORCPT ); Wed, 30 Mar 2022 08:15:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345912AbiC3LzL (ORCPT ); Wed, 30 Mar 2022 07:55:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D80072706E1; Wed, 30 Mar 2022 04:52:30 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 76FBE6160D; Wed, 30 Mar 2022 11:52:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08924C3410F; Wed, 30 Mar 2022 11:52:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1648641149; bh=qW1x31HnZxqlWv9yLK7leVGiHSRFHxjgpFRqN+3ePM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X1mkHVBxG9sfps1+ttRkiXiQ68Pdlq7SAZogzie/jNxGLNNhAJak+Ym2+SlPkwCr/ xtKItEO6C3SQlYpegztsQc5SY9vCYKDdHDknYVCrCn2xgYsSGE+jrQ9s6KWWwWRaaq VDE1KsndUDzcUPc0tw46pMuzPc9oj8E3jKwOnesl5718DO58xGmFpDhEISkJz3EWOy m11KoFh4jAA+5GCdg4LmV8w5b8IhzJ6IOl+Y47uMGnJZ0mraDRem0zT36HJVUq0VYX V+NszdR6Ldhs4I+q4NaQc0IlzZbOgrF+w9vRJKHSsotREFdUkMqsOQq662QCSfsl8I Ex3wjBDS7DAhQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tim Gardner , Antonino Daplas , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Helge Deller , Sasha Levin , tomi.valkeinen@ti.com Subject: [PATCH AUTOSEL 5.4 02/25] video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Date: Wed, 30 Mar 2022 07:52:02 -0400 Message-Id: <20220330115225.1672278-2-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220330115225.1672278-1-sashal@kernel.org> References: <20220330115225.1672278-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tim Gardner [ Upstream commit 37a1a2e6eeeb101285cd34e12e48a881524701aa ] Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer. Cc: Antonino Daplas Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Tim Gardner Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- drivers/video/fbdev/nvidia/nv_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/nvidia/nv_i2c.c b/drivers/video/fbdev/nvidia/nv_i2c.c index d7994a173245..0b48965a6420 100644 --- a/drivers/video/fbdev/nvidia/nv_i2c.c +++ b/drivers/video/fbdev/nvidia/nv_i2c.c @@ -86,7 +86,7 @@ static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name, { int rc; - strcpy(chan->adapter.name, name); + strscpy(chan->adapter.name, name, sizeof(chan->adapter.name)); chan->adapter.owner = THIS_MODULE; chan->adapter.class = i2c_class; chan->adapter.algo_data = &chan->algo; -- 2.34.1