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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AD72C77B75 for ; Mon, 8 May 2023 11:40:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235988AbjEHLkK (ORCPT ); Mon, 8 May 2023 07:40:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236112AbjEHLjh (ORCPT ); Mon, 8 May 2023 07:39:37 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5B5C3F2EA for ; Mon, 8 May 2023 04:39:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 499586335B for ; Mon, 8 May 2023 11:39:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 53EB4C433EF; Mon, 8 May 2023 11:39:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683545965; bh=mL1P054s32u91OzNJTWICd3HBWvvFwxbfG5aIg+LxUs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A5MwgK9YUHDJxf/nIJEAhFzkRwIUkgTg1q1iwgPtNpkoHF/KjHJG4sOwkzFSC4CbK sIKMUQRNmYnfzfbY4JBEB/XjkPs7L/z0+u7OUuzsN2f6L7u7Id0MzTXjrqPwlfBuW0 ASAdD1NB7ANaD2AyArVdo9fnuxv5zcOyTlDcwOe0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniel Gabay , Gregory Greenman , Johannes Berg , Sasha Levin Subject: [PATCH 5.15 212/371] wifi: iwlwifi: yoyo: Fix possible division by zero Date: Mon, 8 May 2023 11:46:53 +0200 Message-Id: <20230508094820.481510770@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094811.912279944@linuxfoundation.org> References: <20230508094811.912279944@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Daniel Gabay [ Upstream commit ba30415118eee374a08b39a0460a1d1e52c24a25 ] Don't allow buffer allocation TLV with zero req_size since it leads later to division by zero in iwl_dbg_tlv_alloc_fragments(). Also, NPK/SRAM locations are allowed to have zero buffer req_size, don't discard them. Fixes: a9248de42464 ("iwlwifi: dbg_ini: add TLV allocation new API support") Signed-off-by: Daniel Gabay Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230413213309.5d6688ed74d8.I5c2f3a882b50698b708d54f4524dc5bdf11e3d32@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c index fc4197bf2478e..f9bd081dd9e08 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c @@ -134,6 +134,12 @@ static int iwl_dbg_tlv_alloc_buf_alloc(struct iwl_trans *trans, alloc_id != IWL_FW_INI_ALLOCATION_ID_DBGC1) goto err; + if (buf_location == IWL_FW_INI_LOCATION_DRAM_PATH && + alloc->req_size == 0) { + IWL_ERR(trans, "WRT: Invalid DRAM buffer allocation requested size (0)\n"); + return -EINVAL; + } + trans->dbg.fw_mon_cfg[alloc_id] = *alloc; return 0; -- 2.39.2