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, 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 9E165C433ED for ; Wed, 12 May 2021 15:02:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A86861469 for ; Wed, 12 May 2021 15:02:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232403AbhELPDk (ORCPT ); Wed, 12 May 2021 11:03:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:56088 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232469AbhELPAV (ORCPT ); Wed, 12 May 2021 11:00:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1EDC361492; Wed, 12 May 2021 14:56:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620831419; bh=xfco83/Vv5h5DsQ/gshP76G6OEa8DgT+NMphR6cfa9A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QP709hF+Cm8pmuTmnju80cLsRKzm+FbHhkWcaiVRRRaQFLogxVmbJ/4B3H4ywVwvr bCXtHOI25nHqn/mMJ8lCtbhHNsM7Vk1+IgG84f6OSFEzXEXmYEBxmegaIPcuXD77GH qT8zL+jegSYZVebh1EwJmQ8YfMuUiZqfAPQXUZGU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sibi Sankar , Bjorn Andersson , Sasha Levin Subject: [PATCH 5.4 111/244] soc: qcom: mdt_loader: Validate that p_filesz < p_memsz Date: Wed, 12 May 2021 16:48:02 +0200 Message-Id: <20210512144746.577041752@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144743.039977287@linuxfoundation.org> References: <20210512144743.039977287@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bjorn Andersson [ Upstream commit 84168d1b54e76a1bcb5192991adde5176abe02e3 ] The code validates that segments of p_memsz bytes of a segment will fit in the provided memory region, but does not validate that p_filesz bytes will, which means that an incorrectly crafted ELF header might write beyond the provided memory region. Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") Reviewed-by: Sibi Sankar Link: https://lore.kernel.org/r/20210107233119.717173-1-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- drivers/soc/qcom/mdt_loader.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c index 24cd193dec55..2ddaee5ef9cc 100644 --- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -230,6 +230,14 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, break; } + if (phdr->p_filesz > phdr->p_memsz) { + dev_err(dev, + "refusing to load segment %d with p_filesz > p_memsz\n", + i); + ret = -EINVAL; + break; + } + ptr = mem_region + offset; if (phdr->p_filesz && phdr->p_offset < fw->size) { -- 2.30.2