From patchwork Tue Oct 6 22:39:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah Khan X-Patchwork-Id: 11819349 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C0EDB175A for ; Tue, 6 Oct 2020 22:39:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E5BB208C7 for ; Tue, 6 Oct 2020 22:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602023964; bh=sRHfTNx9ZWA7a3aCSQlX6uWj8HZcS7kifbrfJT1lPZA=; h=From:To:Cc:Subject:Date:List-ID:From; b=hbwIc8Pt2xx1GsUwsBN2bipnrw7xbhsrAdfH3np0TBjAiHyA2o+5B9+9Z38+NbDGI vwoOR7+HQ80gzUMxTfm0c08okKRCEtnNuu3gYgzqwj6JEJprAFj1OSUMxFWVKyXy0z 488bR2lrbYII3zlkL4h7fvRxDZJL07rVplX4E74g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727092AbgJFWjV (ORCPT ); Tue, 6 Oct 2020 18:39:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726137AbgJFWjV (ORCPT ); Tue, 6 Oct 2020 18:39:21 -0400 Received: from mail-io1-xd41.google.com (mail-io1-xd41.google.com [IPv6:2607:f8b0:4864:20::d41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1453C061755 for ; Tue, 6 Oct 2020 15:39:19 -0700 (PDT) Received: by mail-io1-xd41.google.com with SMTP id 67so236499iob.8 for ; Tue, 06 Oct 2020 15:39:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ib0eyhUXlWV6asnuirsfhCRPVZwzgeyIC0n7EYZIvoo=; b=GUFmjh2R0+zGWILln724So2HoUcwz7/h53QJ8br/zVxEJrc9LkLLYpZHhdqCAyaVEg 3E8jeIhkhXwlHIomg6xkBBOAlJ+XVfXu5lOMBXetLtisMOVZzX86b4Y6xWGZVMWelikq JP+7kyDeZLNN8KwBi1sIFi4AfoKAgeRFgNejQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ib0eyhUXlWV6asnuirsfhCRPVZwzgeyIC0n7EYZIvoo=; b=jv8CuufVnF6gQeu1LoMtJ7HvVFvJE/ECFbBkoeJg8QsERLYAgUwZRU+P9wOe74w31c 0zHN79JBXoxBQoosmLec8TaJ8pKUCAkA4BkJIiHko6lMOOc2cgzsOZoYhLs3/DTaeDEk mqy95gE0UeYuW+shddyBRK6QdvxcKglWxOHDfYAIqyFhttq3o7hjGMhGNgyrUIi+8p+z Zg87u9JWBz4KOQI0nkjOtOpHskw5KNr3pYFefVgaRv5gBULSlDZzllC/FEPtCKfeP/jY 4D/3aOBBZ+HAqAslHb6tV6oosQNjUv2aoREjT9r5w3MUiDAvKF16BYqO8cEeGgXzEr9K cb1g== X-Gm-Message-State: AOAM530ZUzgsriH/ZFb/01BOrYAIYWUJMtqfejxv9ZMq0OObSL69lrEu Ke/tUDp+tJ14iKlw01UhgoMRWA== X-Google-Smtp-Source: ABdhPJzksRQgQUeLdoUwBa1cp9SIh1BGf9Q6SMoRQWk2jEso3MTag113qD0BmcVhyZN2hqUwvbFARg== X-Received: by 2002:a5e:820d:: with SMTP id l13mr53155iom.3.1602023959106; Tue, 06 Oct 2020 15:39:19 -0700 (PDT) Received: from shuah-t480s.internal (c-24-9-64-241.hsd1.co.comcast.net. [24.9.64.241]) by smtp.gmail.com with ESMTPSA id c18sm100911ild.35.2020.10.06.15.39.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2020 15:39:18 -0700 (PDT) From: Shuah Khan To: valentina.manea.m@gmail.com, shuah@kernel.org, gregkh@linuxfoundation.org, stern@rowland.harvard.edu, andreyknvl@google.com Cc: Shuah Khan , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] usbip: vhci_hcd: fix calling usb_hcd_giveback_urb() with irqs enabled Date: Tue, 6 Oct 2020 16:39:14 -0600 Message-Id: <20201006223914.39257-1-skhan@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org kcov testing uncovered call to usb_hcd_giveback_urb() without disabling interrupts. Link: https://lore.kernel.org/linux-usb/CAAeHK+wb4k-LGTjK9F5YbJNviF_+yU+wE_=Vpo9Rn7KFN8vG6Q@mail.gmail.com/ usb_hcd_giveback_urb() is called from vhci's urb_enqueue, when it determines it doesn't need to xmit the urb and can give it back. This path runs in task context. Disable irqs around usb_hcd_giveback_urb() call. Reported-by: Andrey Konovalov Suggested-by: Alan Stern Signed-off-by: Shuah Khan Acked-by: Andrey Konovalov --- Changes in v2: Changelog updated with correct information. drivers/usb/usbip/vhci_hcd.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 1b598db5d8b9..66cde5e5f796 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -797,8 +797,14 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag usb_hcd_unlink_urb_from_ep(hcd, urb); no_need_unlink: spin_unlock_irqrestore(&vhci->lock, flags); - if (!ret) + if (!ret) { + /* usb_hcd_giveback_urb() should be called with + * irqs disabled + */ + local_irq_disable(); usb_hcd_giveback_urb(hcd, urb, urb->status); + local_irq_enable(); + } return ret; }