From patchwork Mon Aug 21 13:03:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Harshitha Prem X-Patchwork-Id: 716888 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 12E64EE49AC for ; Mon, 21 Aug 2023 13:03:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235187AbjHUND5 (ORCPT ); Mon, 21 Aug 2023 09:03:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235184AbjHUND4 (ORCPT ); Mon, 21 Aug 2023 09:03:56 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02167CD for ; Mon, 21 Aug 2023 06:03:55 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37LC1WrB032758; Mon, 21 Aug 2023 13:03:49 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=rhEBeMdZ21PdwS1/40g7cdCMcEX3QPTEjgRZxs125ZU=; b=gsrQzu357zW5vfJ0eLcAr1zotgD0DM/8aODsFq1RsM4STRS0bN0QHs8N/XT9ZdTev+XU q5r5DcBbVfaJUQM6SxmGhH39yTYD83AGQ2LI8aZUv2iQMjgLrrAFimQGH9TutWiC4QGY RXc4L+/9OVP2RFA6XbRao/IYNtqUXiB+v5OmqIwEfHJruybTHhm+h6E52Uzma2q/Oo9F c8zZ8KPxjAsNGbKWv4IbTLTR+/d9lEaEUMI3XX8eGLQ9jycH3ccarFoIYPc2nEI/ZJoC b2U0xOlvNFKqSM+bJOGI7D4HgVnyhPyOcMtatwcNrOltS9UBktcQ2YK8ECAw21IxqRLN 0w== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3sm7jdg3wx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 21 Aug 2023 13:03:48 +0000 Received: from pps.filterd (NASANPPMTA01.qualcomm.com [127.0.0.1]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 37LCfvoM016034; Mon, 21 Aug 2023 13:03:48 GMT Received: from pps.reinject (localhost [127.0.0.1]) by NASANPPMTA01.qualcomm.com (PPS) with ESMTP id 3sm27pc08s-1; Mon, 21 Aug 2023 13:03:48 +0000 Received: from NASANPPMTA01.qualcomm.com (NASANPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 37LD3mgX015039; Mon, 21 Aug 2023 13:03:48 GMT Received: from hprem-linux.qualcomm.com (hprem-linux.qualcomm.com [10.201.162.248]) by NASANPPMTA01.qualcomm.com (PPS) with ESMTP id 37LD3lbb015033; Mon, 21 Aug 2023 13:03:48 +0000 Received: by hprem-linux.qualcomm.com (Postfix, from userid 4146166) id 20AC7B003A8; Mon, 21 Aug 2023 18:33:46 +0530 (IST) From: Harshitha Prem To: ath12k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Harshitha Prem Subject: [PATCH v2 1/2] wifi: ath12k: Ignore fragments from uninitialized peer in dp Date: Mon, 21 Aug 2023 18:33:42 +0530 Message-Id: <20230821130343.29495-2-quic_hprem@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230821130343.29495-1-quic_hprem@quicinc.com> References: <20230821130343.29495-1-quic_hprem@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: m2fabhvWVMoxg3I7nhu81l2nTqFPqlH1 X-Proofpoint-ORIG-GUID: m2fabhvWVMoxg3I7nhu81l2nTqFPqlH1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-21_01,2023-08-18_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 phishscore=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 mlxlogscore=993 suspectscore=0 priorityscore=1501 impostorscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308210120 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org When max virtual ap interfaces are configured in all the bands with ACS and hostapd restart is done every 60s, a crash is observed at random times. In the above scenario, a fragmented packet is received for self peer, for which rx_tid and rx_frags are not initialized in datapath. While handling this fragment, crash is observed as the rx_frag list is uninitialized and when we walk in ath12k_dp_rx_h_sort_frags, skb null leads to exception. To address this, before processing received fragments we check dp_setup_done flag is set to ensure that peer has completed its dp peer setup for fragment queue, else ignore processing the fragments. Call trace: PC points to "ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k]" LR points to "ath12k_dp_process_rx_err+0x480/0xfcc [ath12k]". The Backtrace obtained is as follows: ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k] ath12k_dp_service_srng+0x78/0x260 [ath12k] ath12k_pci_write32+0x990/0xb0c [ath12k] __napi_poll+0x30/0xa4 net_rx_action+0x118/0x270 __do_softirq+0x10c/0x244 irq_exit+0x64/0xb4 __handle_domain_irq+0x88/0xac gic_handle_irq+0x74/0xbc el1_irq+0xf0/0x1c0 arch_cpu_idle+0x10/0x18 do_idle+0x104/0x248 cpu_startup_entry+0x20/0x64 rest_init+0xd0/0xdc arch_call_rest_init+0xc/0x14 Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Harshitha Prem --- drivers/net/wireless/ath/ath12k/dp.c | 1 + drivers/net/wireless/ath/ath12k/dp_rx.c | 9 +++++++++ drivers/net/wireless/ath/ath12k/peer.h | 3 +++ 3 files changed, 13 insertions(+) diff --git a/drivers/net/wireless/ath/ath12k/dp.c b/drivers/net/wireless/ath/ath12k/dp.c index ae1645d0f42a..d825e08d820a 100644 --- a/drivers/net/wireless/ath/ath12k/dp.c +++ b/drivers/net/wireless/ath/ath12k/dp.c @@ -38,6 +38,7 @@ void ath12k_dp_peer_cleanup(struct ath12k *ar, int vdev_id, const u8 *addr) ath12k_dp_rx_peer_tid_cleanup(ar, peer); crypto_free_shash(peer->tfm_mmic); + peer->dp_setup_done = false; spin_unlock_bh(&ab->base_lock); } diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c index 67f8c140840f..5923c7c9eaff 100644 --- a/drivers/net/wireless/ath/ath12k/dp_rx.c +++ b/drivers/net/wireless/ath/ath12k/dp_rx.c @@ -2748,6 +2748,7 @@ int ath12k_dp_rx_peer_frag_setup(struct ath12k *ar, const u8 *peer_mac, int vdev } peer->tfm_mmic = tfm; + peer->dp_setup_done = true; spin_unlock_bh(&ab->base_lock); return 0; @@ -3214,6 +3215,14 @@ static int ath12k_dp_rx_frag_h_mpdu(struct ath12k *ar, ret = -ENOENT; goto out_unlock; } + + if (!peer->dp_setup_done) { + ath12k_warn(ab, "The peer %pM [%d] has uninitialized datapath\n", + peer->addr, peer_id); + ret = -ENOENT; + goto out_unlock; + } + rx_tid = &peer->rx_tid[tid]; if ((!skb_queue_empty(&rx_tid->rx_frags) && seqno != rx_tid->cur_sn) || diff --git a/drivers/net/wireless/ath/ath12k/peer.h b/drivers/net/wireless/ath/ath12k/peer.h index b296dc0e2f67..c6edb24cbedd 100644 --- a/drivers/net/wireless/ath/ath12k/peer.h +++ b/drivers/net/wireless/ath/ath12k/peer.h @@ -44,6 +44,9 @@ struct ath12k_peer { struct ppdu_user_delayba ppdu_stats_delayba; bool delayba_flag; bool is_authorized; + + /* protected by ab->data_lock */ + bool dp_setup_done; }; void ath12k_peer_unmap_event(struct ath12k_base *ab, u16 peer_id);