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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54FDFC19F33 for ; Wed, 18 Aug 2021 06:06:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F7DD60EBC for ; Wed, 18 Aug 2021 06:06:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238424AbhHRGGq (ORCPT ); Wed, 18 Aug 2021 02:06:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238143AbhHRGG3 (ORCPT ); Wed, 18 Aug 2021 02:06:29 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5D6AC06129F for ; Tue, 17 Aug 2021 23:05:53 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id nt11so1954828pjb.2 for ; Tue, 17 Aug 2021 23:05:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=q4cKFwd96rtgoKUA6YKX4IuNE9lx/g0UxBcz1pPF338=; b=XMP/StYU8/uLPb/wnRLBGcR3u0V44//53QV0+x1LgHJ11cZUCGD0IAf1IdZ9lDwoLp ZWOz/05bmRXmG9lRDJTD/ZXWTRiCTSdo0A6fczMhmhv2vGilaJvHGHdE7jf23BYsCSiQ dajYZnjb8/arsD8ARG/qxbTWVP2y2RLAspLSY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=q4cKFwd96rtgoKUA6YKX4IuNE9lx/g0UxBcz1pPF338=; b=tnSBVUbJrlqrbUtB99lawN2HF4FO5NW7bQjS5drzoeppFy5+pePcVBVZL6a0Z75ADs nHZm+YZPFKEKVsp6BINeJc+jECvVSmM4oLoAMpCYO0I3FzR0mbHUueP5AohaiV93r2Fy x5QUalY0OZUSTx7xdMggl2tUlJw3hUQ0A2uuOw3QogPe5MUnt7fqgKL4Zl6t0TmOeD/B knosMRRuAvzstwSqKb6JlAGW85Ys4Jd6o8yMatNUbFOVtkRDXjbGnwv4zzP3GMuP0IlQ N0cgoxlmBWWmFyhCzJwIoiHqueMPrJ0AwwUuxZXDN6cSDnpG+uIKdqv+lTINQDpOScJP feRw== X-Gm-Message-State: AOAM531ZBatFnaLDFI5GBG26yWoEuLz4eIW9x0zFn5ltZW5xxwC00ID4 7BRg2CZnJuaM0rOooPQc/cz0uA== X-Google-Smtp-Source: ABdhPJzh3Fos81jJQtXdS+gHGD3Ay4RQaFm6BN3MlQDNgQinKTKzGT7YEaeNTn6TT/NjBcYzUiAE7g== X-Received: by 2002:a17:90a:c244:: with SMTP id d4mr7684531pjx.38.1629266753333; Tue, 17 Aug 2021 23:05:53 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id j4sm5379890pgi.6.2021.08.17.23.05.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 23:05:51 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , Andy Gross , Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, "Gustavo A . R . Silva" , Greg Kroah-Hartman , Andrew Morton , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, Rasmus Villemoes , linux-hardening@vger.kernel.org Subject: [PATCH v2 03/63] rpmsg: glink: Replace strncpy() with strscpy_pad() Date: Tue, 17 Aug 2021 23:04:33 -0700 Message-Id: <20210818060533.3569517-4-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org> References: <20210818060533.3569517-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2189; h=from:subject; bh=zEHqpi3jCPJJtimsK7NnbA6EWwLoFKP9r9dL5ArZyiQ=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhHKMe8xrKEUyyynWY+9ZZnkpsPM1eYEwBqySCGW3z U2JTvZSJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYRyjHgAKCRCJcvTf3G3AJsNcD/ 9XTm0UNtLhF3pcJlIGQ3OBX+21oX4i3rCVVUF6tE46BnLDEeTE53Dgx2PT3pmkaqnzHQEBiWdAf3D+ 2ibPEIWXlwbj/FEpJcA5DcOhIfEfnzVBjHhlpnJrh3SUlVbIH9XtzFjtsdZ62/6vRCWqqArv25gvTH 5vxwJnbsrBQoJVmDrGhqBbXkHwDMfTU3uqjDwaqLe+Jkddl6WDrvL7HDi/a/O+TPG8Ryye+tkF8oUf ynPS+GUMYS16FY7ASzH/0ByS7HnPSf7jbXyCDl9CItMWBCukRuP92dgD5E5h+780QjYVR1TOYTsK7L 29q0KYIRAz/CU7s7NU3I6O+skA8+wO2q8V/qNN9IwIYlovEae8xYxtZGFKS7Asnkx5L41BTHNAewGa ywsnWka4jG//fkzAcJxqaWp/LNz7YIf4ftOs7TahiCUUPyNjn9hGBXe/6UCbulNetUvkUh3MpYNLgO 29/PcVY/jHQm6XmFOLai05ukoMYzOImxjihjBRnvhun0ISzdDvZiF7LuyX34tnTNoUqw0tPYmoyzzS qwS895l/S/Iu0aJ6C60OCVKPU+rRZE7aqmw0H4xtsS4EhelVEbtCx+EFSZg6NR+iqtNBvI80hwpi2k l928h0W2SY4eY/GnEj658aM4Rs5DKGjtsLy4poujBDA8Ehq211Zk9Xhct33g== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The use of strncpy() is considered deprecated for NUL-terminated strings[1]. Replace strncpy() with strscpy_pad() (as it seems this case expects the NUL padding to fill the allocation following the flexible array). This additionally silences a warning seen when building under -Warray-bounds: ./include/linux/fortify-string.h:38:30: warning: '__builtin_strncpy' offset 24 from the object at '__mptr' is out of the bounds of referenced subobject 'data' with type 'u8[]' {aka 'unsigned char[]'} at offset 24 [-Warray-bounds] 38 | #define __underlying_strncpy __builtin_strncpy | ^ ./include/linux/fortify-string.h:50:9: note: in expansion of macro '__underlying_strncpy' 50 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ drivers/rpmsg/qcom_glink_native.c: In function 'qcom_glink_work': drivers/rpmsg/qcom_glink_native.c:36:5: note: subobject 'data' declared here 36 | u8 data[]; | ^~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings Cc: Andy Gross Cc: Bjorn Andersson Cc: Ohad Ben-Cohen Cc: Mathieu Poirier Cc: linux-arm-msm@vger.kernel.org Cc: linux-remoteproc@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/lkml/20210728020745.GB35706@embeddedor --- drivers/rpmsg/qcom_glink_native.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 05533c71b10e..c7b9de655080 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1440,7 +1440,7 @@ static int qcom_glink_rx_open(struct qcom_glink *glink, unsigned int rcid, } rpdev->ept = &channel->ept; - strncpy(rpdev->id.name, name, RPMSG_NAME_SIZE); + strscpy_pad(rpdev->id.name, name, RPMSG_NAME_SIZE); rpdev->src = RPMSG_ADDR_ANY; rpdev->dst = RPMSG_ADDR_ANY; rpdev->ops = &glink_device_ops; -- 2.30.2