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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 104CBC433E1 for ; Thu, 20 Aug 2020 13:02:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3F7F207DA for ; Thu, 20 Aug 2020 13:02:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597928523; bh=TR0u0Tg/4wUTCtl8JfcQ5s5qtVO/WCoEmg9siCooIaY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=v42PvopGuVl/pNUXDBCqbiDz+51i0rDXP+zvrlLmivzJU/BjGYN/qUcbmUHjnyK6b wJTt2GKTnFHuvzMkuVOFGvsDJZTtbX73yoHYCbLm3wJpygGGhfBE6aiXm4CxrlO8QB feZ5vqbZLg5VqCVprEFBa4NielCH6jUtAyU8OeM4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729166AbgHTNCC (ORCPT ); Thu, 20 Aug 2020 09:02:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:32926 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729032AbgHTJkf (ORCPT ); Thu, 20 Aug 2020 05:40:35 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5EC3D2075E; Thu, 20 Aug 2020 09:40:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597916435; bh=TR0u0Tg/4wUTCtl8JfcQ5s5qtVO/WCoEmg9siCooIaY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tbp/Yf8zqSmf56Wx7HHTFgQRRrK9mi41I/UP5n3dUm74nDxo/GHPJ1K7YQQuSAV5x lTR9p2ViYmyBcbzVDA/kmhyN0mPwC4miDbYHvgCCf2Y/VJadn1ehH3wqrGWcf9xDKl 30go38LluMgcrEacVtcLtLYm1RcQZ8tuJPi3iI3g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bjorn Andersson , Sibi Sankar Subject: [PATCH 5.7 096/204] remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load Date: Thu, 20 Aug 2020 11:19:53 +0200 Message-Id: <20200820091611.127579684@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091606.194320503@linuxfoundation.org> References: <20200820091606.194320503@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sibi Sankar commit 135b9e8d1cd8ba5ac9ad9bcf24b464b7b052e5b8 upstream. The following mem abort is observed when one of the modem blob firmware size exceeds the allocated mpss region. Fix this by restricting the copy size to segment size using request_firmware_into_buf before load. Err Logs: Unable to handle kernel paging request at virtual address Mem abort info: ... Call trace: __memcpy+0x110/0x180 rproc_start+0xd0/0x190 rproc_boot+0x404/0x550 state_store+0x54/0xf8 dev_attr_store+0x44/0x60 sysfs_kf_write+0x58/0x80 kernfs_fop_write+0x140/0x230 vfs_write+0xc4/0x208 ksys_write+0x74/0xf8 ... Reviewed-by: Bjorn Andersson Fixes: 051fb70fd4ea4 ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") Cc: stable@vger.kernel.org Signed-off-by: Sibi Sankar Link: https://lore.kernel.org/r/20200722201047.12975-3-sibis@codeaurora.org Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/remoteproc/qcom_q6v5_mss.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/drivers/remoteproc/qcom_q6v5_mss.c +++ b/drivers/remoteproc/qcom_q6v5_mss.c @@ -1145,15 +1145,14 @@ static int q6v5_mpss_load(struct q6v5 *q } else if (phdr->p_filesz) { /* Replace "xxx.xxx" with "xxx.bxx" */ sprintf(fw_name + fw_name_len - 3, "b%02d", i); - ret = request_firmware(&seg_fw, fw_name, qproc->dev); + ret = request_firmware_into_buf(&seg_fw, fw_name, qproc->dev, + ptr, phdr->p_filesz); if (ret) { dev_err(qproc->dev, "failed to load %s\n", fw_name); iounmap(ptr); goto release_firmware; } - memcpy(ptr, seg_fw->data, seg_fw->size); - release_firmware(seg_fw); }