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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 17CA0C76195 for ; Mon, 15 Jul 2019 14:55:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DBE682067C for ; Mon, 15 Jul 2019 14:55:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202524; bh=zYV7CxvtS3NWj05ijEC7m/2+ntlXcyOu+ePKTd6O2c8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=BI4m27wmTVLO3n4wzxPxxy+YbOLo5qx+y+TKUnLaSxZg2FEM4S/Bisxps/5o0sq8+ UAZf4YnzzE34B3FMCz2uRROuHQCqBPZNKNJ7kcCFRxm1mzUGLV24MccfiL02tTAZw1 JVIKQD36+zi+ZMPUkub4dz2JD/XGBndIloWXXVME= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390866AbfGOO0q (ORCPT ); Mon, 15 Jul 2019 10:26:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:35154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390462AbfGOO0p (ORCPT ); Mon, 15 Jul 2019 10:26:45 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 11BC621842; Mon, 15 Jul 2019 14:26:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563200804; bh=zYV7CxvtS3NWj05ijEC7m/2+ntlXcyOu+ePKTd6O2c8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mBe4BIDZ/hyvRnEbDbFy6uUiD4kUsLMdVV6PK3nBTLO2JZL9e9ZW53hyXn5MvOTZ2 FwsxcxFxIBc2akQDBFz7bg9/9V1GHz75+WFCYzZt6IURTAhg0CgsI2lD8KQsvvXThR obsEMoiB/A3zvu6rW6xPS5aaWnxN5ZvdU/h4L5zU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andrei Otcheretianski , Luca Coelho , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 134/158] iwlwifi: mvm: Drop large non sta frames Date: Mon, 15 Jul 2019 10:17:45 -0400 Message-Id: <20190715141809.8445-134-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715141809.8445-1-sashal@kernel.org> References: <20190715141809.8445-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Andrei Otcheretianski [ Upstream commit ac70499ee97231a418dc1a4d6c9dc102e8f64631 ] In some buggy scenarios we could possible attempt to transmit frames larger than maximum MSDU size. Since our devices don't know how to handle this, it may result in asserts, hangs etc. This can happen, for example, when we receive a large multicast frame and try to transmit it back to the air in AP mode. Since in a legal scenario this should never happen, drop such frames and warn about it. Signed-off-by: Andrei Otcheretianski Signed-off-by: Luca Coelho Signed-off-by: Sasha Levin --- drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index 2d21f0a1fa00..ffae299c3492 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -641,6 +641,9 @@ int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) memcpy(&info, skb->cb, sizeof(info)); + if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) + return -1; + if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) return -1; -- 2.20.1