From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqZ3RELJ6tcVX1wKLbj4OFo7GMfhNbor7uE4DhYf2c/O2xljZgtAMYzReGkG2N1v6OeJLst ARC-Seal: i=1; a=rsa-sha256; t=1525116350; cv=none; d=google.com; s=arc-20160816; b=TCLYa8Yk6zuTLJXjcrI/X2G6GxxgCPUluM5WRadJmHttqiOBuzo3XlUGcptL1OsIK/ gmxZunrczUsrLK43/5DPGWMiRRgXYGxRWsGU17Y1g9caaQotPVLe4vvd3AT45VBpo+Ro G6/14cKIXeh+mQCJ0AgPP3dm3ke1A5aDRFjFTT84royjYuuaYDuZUNDcB2JL3zOGB1LX WAqOA3+Dzt57Y5KJ76ZgowBssbiHS8XOjvEg6tLyyB/RhA0tFvWUJu6H1dJCTIL3npwN 2g4y4Ho3QJjlsvtuxjMjd7Q/CovbrumuW7KwB7Cca83gDLwd+e5fyBQUDxW7aoR2vaWz SQvQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:dmarc-filter:arc-authentication-results; bh=WXDj5i0tUWBPa63GLfuevdV2Cdn4xFYKto+kt2AepHs=; b=URkD7aQGaOsUtePK5K4KJfwd2GkkyeFhT9gLfbSNSl/23h3mOxTs8ckBZtVkIBcpo2 smhIH8uPVpowHZDTWutcmEFSiF5BeuWM61oIWVbCW5DR4OVfxI3+s7WWMdZzrHemc4JH lcA3q4Tk5yljUU+/+C5wj2o2KODOOK07Dm+IGojKxM+7IA+wamDb1vGtfrTm86GLzz5k mXT6x9+ct2CSULvZmqxnBmc0x7003CIQBVHHv82mC2VfqItrp889A+5zj9Rmtv20zFQ+ HjhswMMn5/LTWEXEt1dVAPpGtMHgw/T+3UE7wwxVxeax8v2XUVzlTtY9QQZT5px1P4xx 5w5g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of srs0=k66p=ht=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=K66P=HT=linuxfoundation.org=gregkh@kernel.org Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of srs0=k66p=ht=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=K66P=HT=linuxfoundation.org=gregkh@kernel.org DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7562422DAC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=fail smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shuah Khan Subject: [PATCH 4.4 05/44] usbip: usbip_host: fix to hold parent lock for device_attach() calls Date: Mon, 30 Apr 2018 12:24:16 -0700 Message-Id: <20180430190946.548163410@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180430190946.093694747@linuxfoundation.org> References: <20180430190946.093694747@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1599200289053392249?= X-GMAIL-MSGID: =?utf-8?q?1599200402338855090?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shuah Khan commit 4bfb141bc01312a817d36627cc47c93f801c216d upstream. usbip_host calls device_attach() without holding dev->parent lock. Fix it. Signed-off-by: Shuah Khan Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_main.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -201,7 +201,12 @@ static ssize_t rebind_store(struct devic if (!bid) return -ENODEV; + /* device_attach() callers should hold parent lock for USB */ + if (bid->udev->dev.parent) + device_lock(bid->udev->dev.parent); ret = device_attach(&bid->udev->dev); + if (bid->udev->dev.parent) + device_unlock(bid->udev->dev.parent); if (ret < 0) { dev_err(&bid->udev->dev, "rebind failed\n"); return ret;