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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, 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 A7D3AC433E2 for ; Tue, 8 Sep 2020 16:24:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4725720678 for ; Tue, 8 Sep 2020 16:24:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599582252; bh=6ABlp9+wcVdx81zzzjvzeQsU7AAr4YpLoxK1KXLo8P0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XlgGwZgngZ6oJnVwUyHT/Rscit1lg8O+YWm8+yteKoEgM9/RexXOQTO6zaHcbeIdG bVwpsa0b/XFm+AEuPOlYLhXMn9Ue2yoOKCJfsv1XL0Y8dbTvSbHJeb2ITDbvPGVz2D J22D5ZShs/camJ3uUvKvM26/Wct5F5HQSK/eey+Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731930AbgIHQYI (ORCPT ); Tue, 8 Sep 2020 12:24:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:56658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731506AbgIHQLz (ORCPT ); Tue, 8 Sep 2020 12:11:55 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 E7C57247A7; Tue, 8 Sep 2020 15:42:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599579741; bh=6ABlp9+wcVdx81zzzjvzeQsU7AAr4YpLoxK1KXLo8P0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X0XGVNHcUW357EaTdA/mPJCMPWZGRpkwoPvI7m5K00iNk86u/FzFzDRGkV2w1CaT6 rkTBoPVsxd5nKC0tpv3NaM4662PX6b92dwQ/CWEWg+gZhgtBNarjoT09lGXbabu8fj KkVJZetZxccFmOyz4MmJIfOdctFuOl3HElaxgiRY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ofir Bitton , Oded Gabbay , Sasha Levin Subject: [PATCH 5.4 008/129] habanalabs: validate FW file size Date: Tue, 8 Sep 2020 17:24:09 +0200 Message-Id: <20200908152230.106783696@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200908152229.689878733@linuxfoundation.org> References: <20200908152229.689878733@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: Ofir Bitton [ Upstream commit bce382a8bb080ed5f2f3a06754526dc58b91cca2 ] We must validate FW size in order not to corrupt memory in case a malicious FW file will be present in system. Signed-off-by: Ofir Bitton Signed-off-by: Oded Gabbay Signed-off-by: Sasha Levin --- drivers/misc/habanalabs/firmware_if.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/misc/habanalabs/firmware_if.c b/drivers/misc/habanalabs/firmware_if.c index ea2ca67fbfbfa..153858475abc1 100644 --- a/drivers/misc/habanalabs/firmware_if.c +++ b/drivers/misc/habanalabs/firmware_if.c @@ -11,6 +11,7 @@ #include #include +#define FW_FILE_MAX_SIZE 0x1400000 /* maximum size of 20MB */ /** * hl_fw_push_fw_to_device() - Push FW code to device. * @hdev: pointer to hl_device structure. @@ -43,6 +44,14 @@ int hl_fw_push_fw_to_device(struct hl_device *hdev, const char *fw_name, dev_dbg(hdev->dev, "%s firmware size == %zu\n", fw_name, fw_size); + if (fw_size > FW_FILE_MAX_SIZE) { + dev_err(hdev->dev, + "FW file size %zu exceeds maximum of %u bytes\n", + fw_size, FW_FILE_MAX_SIZE); + rc = -EINVAL; + goto out; + } + fw_data = (const u64 *) fw->data; memcpy_toio(dst, fw_data, fw_size); -- 2.25.1