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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 97428C4332D for ; Thu, 19 Mar 2020 13:14:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DEB821556 for ; Thu, 19 Mar 2020 13:14:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584623664; bh=6NYbwMXoJ+wlGSNvLLs16uAuTFfZ4lyBAET+75s50H8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZbAC8Jh4sBM5ydaShzhNt/uHKMLv8w/GBYdYhf4W3AyebzPMkS9WX6GkiMhx/VvvC 7KeD9pvyrvVypceSW+u4tF1GXbS28EEGrWM3wWDCch+KKChX5+556bCc9hlZ8rAz4y fV9ZRwWToKIun+lHd/YhtlW/kX8TWuUz+F+2OKdU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728852AbgCSNOX (ORCPT ); Thu, 19 Mar 2020 09:14:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:33672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729273AbgCSNOR (ORCPT ); Thu, 19 Mar 2020 09:14:17 -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 AAF7B206D7; Thu, 19 Mar 2020 13:14:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584623657; bh=6NYbwMXoJ+wlGSNvLLs16uAuTFfZ4lyBAET+75s50H8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N2nz1PmWcT/uN1K57u3PGDdnVLWD+xgI3VTBVh2yJIQT3NhOyD/1rPLfcSp/kmVOP PJbpTb2HSz8y+MDNboKXK2GgfB665uLalmNuVd7CzmfM/CufHO6vwzWNNFvRe/d15S HhZfIb0j6AvrI2uIPz34gA/9PF8sCW8XPm247Lo0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , "David S. Miller" Subject: [PATCH 4.14 10/99] net: nfc: fix bounds checking bugs on "pipe" Date: Thu, 19 Mar 2020 14:02:48 +0100 Message-Id: <20200319123944.592207737@linuxfoundation.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200319123941.630731708@linuxfoundation.org> References: <20200319123941.630731708@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: Dan Carpenter [ Upstream commit a3aefbfe45751bf7b338c181b97608e276b5bb73 ] This is similar to commit 674d9de02aa7 ("NFC: Fix possible memory corruption when handling SHDLC I-Frame commands") and commit d7ee81ad09f0 ("NFC: nci: Add some bounds checking in nci_hci_cmd_received()") which added range checks on "pipe". The "pipe" variable comes skb->data[0] in nfc_hci_msg_rx_work(). It's in the 0-255 range. We're using it as the array index into the hdev->pipes[] array which has NFC_HCI_MAX_PIPES (128) members. Fixes: 118278f20aa8 ("NFC: hci: Add pipes table to reference them with a tuple {gate, host}") Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/nfc/hci/core.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) --- a/net/nfc/hci/core.c +++ b/net/nfc/hci/core.c @@ -193,13 +193,20 @@ exit: void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, struct sk_buff *skb) { - u8 gate = hdev->pipes[pipe].gate; u8 status = NFC_HCI_ANY_OK; struct hci_create_pipe_resp *create_info; struct hci_delete_pipe_noti *delete_info; struct hci_all_pipe_cleared_noti *cleared_info; + u8 gate; - pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd); + pr_debug("from pipe %x cmd %x\n", pipe, cmd); + + if (pipe >= NFC_HCI_MAX_PIPES) { + status = NFC_HCI_ANY_E_NOK; + goto exit; + } + + gate = hdev->pipes[pipe].gate; switch (cmd) { case NFC_HCI_ADM_NOTIFY_PIPE_CREATED: @@ -387,8 +394,14 @@ void nfc_hci_event_received(struct nfc_h struct sk_buff *skb) { int r = 0; - u8 gate = hdev->pipes[pipe].gate; + u8 gate; + + if (pipe >= NFC_HCI_MAX_PIPES) { + pr_err("Discarded event %x to invalid pipe %x\n", event, pipe); + goto exit; + } + gate = hdev->pipes[pipe].gate; if (gate == NFC_HCI_INVALID_GATE) { pr_err("Discarded event %x to unopened pipe %x\n", event, pipe); goto exit;