From patchwork Thu Dec 29 10:28:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 37350 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp2333007wrt; Thu, 29 Dec 2022 02:33:54 -0800 (PST) X-Google-Smtp-Source: AMrXdXswzBgZ76B5bUdz/prdPrfm2k5/oRK67Tir5SsGaaDFFMhbxnEjC4gIGyRYj0ATCqMcCrT+ X-Received: by 2002:aa7:dd13:0:b0:463:ba73:9139 with SMTP id i19-20020aa7dd13000000b00463ba739139mr21873803edv.2.1672310034506; Thu, 29 Dec 2022 02:33:54 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1672310034; cv=none; d=google.com; s=arc-20160816; b=A9rXls8VvwIvxFiz/gAb2mu42r9ZicWsKUm/5OKU6NZhF6NkFd61uuccvnB59348bB p0QFoIY3oTVZBEzE1m3klIifJZDrRJGpw6ozhyI1URbuI3nt6ILPf4NiyZ8SVriYvOYf 03BIAN2oVQQzhgjmacHHWd8fX7eZilkHaEWrXx7iOW9Ae4vlSXbTcRcdRVMZ/IA3RYn7 2iXSFEXoK6Yr+g3X9qu8EkS8tI4iUVbpA2aR+A5KovWZLOr98fcvYwn0wdZrMTN/nprK JdYu2Azz74E8wN0RmzFGsXdqilqT6klIHJn0HalTThAHF7UFYZ+vfrwxEcpeIRRjbXJb V4hw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=tTij5lXnahNVnZelM9IFWy8LRMTXDX20UWVAv2jM92s=; b=L6FXZIhk2D7s+Yv662NSBNYKE1AY9IfNlaw2S+CxmvQZ9EF2pWACBg5y6II2ilWvb9 5noW1r1cOakZjGLlmH48EiKE9HCzp6Zw/6d3afN9qi57Wi/hvAouqGqr5w88hBpNVNqh b5JmDzUpECuM+E2qFI0e16K10luA7pVXR/JnLsFlRIIUk0bOdZzz7WdDK2LEcyvmMv+0 P2Cpu5om/xhjnROUUNFbUqsH/kuduewDo/9XN/O+QPgV34NiCTCryFMkkKwot1mHTaNM Ys2WL1DC3AJglkrWAiFPPAfAH+bxkCxgb0z8MDjMMblgz96YTNfVOaSFeRpdG00MgY+W Rk9g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=aOyIJd5P; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t20-20020aa7db14000000b0046c9522362asi14396128eds.269.2022.12.29.02.33.30; Thu, 29 Dec 2022 02:33:54 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=aOyIJd5P; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230441AbiL2K27 (ORCPT + 99 others); Thu, 29 Dec 2022 05:28:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55284 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230427AbiL2K2j (ORCPT ); Thu, 29 Dec 2022 05:28:39 -0500 Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B59E61EE for ; Thu, 29 Dec 2022 02:28:37 -0800 (PST) Received: by mail-lj1-x231.google.com with SMTP id e13so16432607ljn.0 for ; Thu, 29 Dec 2022 02:28:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=tTij5lXnahNVnZelM9IFWy8LRMTXDX20UWVAv2jM92s=; b=aOyIJd5P9eX5swjwULosY3OgLA4/BTPCObCz76Xo9ft+wLJ1VspYKdA7s/qvxMF0ne CYVjdU8JSUsK5dsJVZJaeiLE7JHITgQY4Os9x4Lz7RLp272ZFJmoYQ/r5RHdxupKHWji TslHvBAMc1AaiQeTstPpiEbZOCHJaTj0VgNHNsnT2Kd9cq2RxxLBND7y12Okxswhoa3Z GO6lR3xLwlVWSzW/g5Y33cSRMXtlsR6h4jEyp7b0jSeFqj4a75CZrgDgdvrhnM8um7/f /VlSTeInKC+J1X0yJCNDnKOEG0tnvbfDb+A2xkf6SHRL8fbYW4vkJ7AsloYtGlGEvS5z biXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=tTij5lXnahNVnZelM9IFWy8LRMTXDX20UWVAv2jM92s=; b=qgrfY7Sv0RvliNzHd6RcJdUPF40gE8lZURM6eejhTO4Fm1fVu5pjOz7KaCuKxJVzi+ 3PYfcsncJzSv/ym57o36ppBIQ0HWYRSfO7daQ5JCkvlb+zscOZWrg8kJHyvVl85niJP0 y6Zi7Q1q6HWAyNsIf6IqUb/jpBtTsP3RsKsUhSCCfAuZpwNxAUnOX0DPr34wcmLKwfM3 NHOdmeK2LHBXGkKKu+Q5zgplxjlXn36pAt8aTa6sfCbhMkHlGeWD+zYfqQ6VQqibYIFy 7s7nBLaXF84bOH/l1M8851FyIx7OR7APC6sslOhI8wfjrtmdkUtfW8sPa/WI+R7Uamyk nieA== X-Gm-Message-State: AFqh2kpWwRoCupO/Hl8nof4undcSjhIdj3+CiYTloBOAbLUZdh8BBaM+ U7+eH9VMxuVjfLM9X8FU152Jiw== X-Received: by 2002:a2e:a481:0:b0:277:913:aed0 with SMTP id h1-20020a2ea481000000b002770913aed0mr7327380lji.4.1672309716014; Thu, 29 Dec 2022 02:28:36 -0800 (PST) Received: from krzk-bin.NAT.warszawa.vectranet.pl (088156142067.dynamic-2-waw-k-3-2-0.vectranet.pl. [88.156.142.67]) by smtp.gmail.com with ESMTPSA id r22-20020a2eb616000000b0027fbfaa26dbsm1291311ljn.14.2022.12.29.02.28.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Dec 2022 02:28:35 -0800 (PST) From: Krzysztof Kozlowski To: Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH v2] Bluetooth: hci_qca: Fix driver shutdown on closed serdev Date: Thu, 29 Dec 2022 11:28:29 +0100 Message-Id: <20221229102829.403917-1-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1753544166685409158?= X-GMAIL-MSGID: =?utf-8?q?1753544166685409158?= The driver shutdown callback (which sends EDL_SOC_RESET to the device over serdev) should not be invoked when HCI device is not open (e.g. if hci_dev_open_sync() failed), because the serdev and its TTY are not open either. Also skip this step if device is powered off (qca_power_shutdown()). The shutdown callback causes use-after-free during system reboot with Qualcomm Atheros Bluetooth: Unable to handle kernel paging request at virtual address 0072662f67726fd7 ... CPU: 6 PID: 1 Comm: systemd-shutdow Tainted: G W 6.1.0-rt5-00325-g8a5f56bcfcca #8 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: tty_driver_flush_buffer+0x4/0x30 serdev_device_write_flush+0x24/0x34 qca_serdev_shutdown+0x80/0x130 [hci_uart] device_shutdown+0x15c/0x260 kernel_restart+0x48/0xac KASAN report: BUG: KASAN: use-after-free in tty_driver_flush_buffer+0x1c/0x50 Read of size 8 at addr ffff16270c2e0018 by task systemd-shutdow/1 CPU: 7 PID: 1 Comm: systemd-shutdow Not tainted 6.1.0-next-20221220-00014-gb85aaf97fb01-dirty #28 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: dump_backtrace.part.0+0xdc/0xf0 show_stack+0x18/0x30 dump_stack_lvl+0x68/0x84 print_report+0x188/0x488 kasan_report+0xa4/0xf0 __asan_load8+0x80/0xac tty_driver_flush_buffer+0x1c/0x50 ttyport_write_flush+0x34/0x44 serdev_device_write_flush+0x48/0x60 qca_serdev_shutdown+0x124/0x274 device_shutdown+0x1e8/0x350 kernel_restart+0x48/0xb0 __do_sys_reboot+0x244/0x2d0 __arm64_sys_reboot+0x54/0x70 invoke_syscall+0x60/0x190 el0_svc_common.constprop.0+0x7c/0x160 do_el0_svc+0x44/0xf0 el0_svc+0x2c/0x6c el0t_64_sync_handler+0xbc/0x140 el0t_64_sync+0x190/0x194 Fixes: 7e7bbddd029b ("Bluetooth: hci_qca: Fix qca6390 enable failure after warm reboot") Cc: Signed-off-by: Krzysztof Kozlowski --- Changes since v1: 1. Drop serdev patch and fix it only on BT side. 2. Update commit msg. --- drivers/bluetooth/hci_qca.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index bb7623fe53a8..157fc4d024c1 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -2166,10 +2166,16 @@ static void qca_serdev_shutdown(struct device *dev) int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); struct serdev_device *serdev = to_serdev_device(dev); struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); + struct hci_uart *hu = &qcadev->serdev_hu; + struct hci_dev *hdev = hu->hdev; + struct qca_data *qca = hu->priv; const u8 ibs_wake_cmd[] = { 0xFD }; const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 }; if (qcadev->btsoc_type == QCA_QCA6390) { + if (test_bit(QCA_BT_OFF, &qca->flags) || !test_bit(HCI_RUNNING, &hdev->flags)) + return; + serdev_device_write_flush(serdev); ret = serdev_device_write_buf(serdev, ibs_wake_cmd, sizeof(ibs_wake_cmd));