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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 61B3DC433DF for ; Thu, 4 Jun 2020 23:46:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 228FD2075B for ; Thu, 4 Jun 2020 23:46:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="USAMae2A" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 228FD2075B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BB51F280007; Thu, 4 Jun 2020 19:46:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B655E280002; Thu, 4 Jun 2020 19:46:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A53F1280007; Thu, 4 Jun 2020 19:46:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0143.hostedemail.com [216.40.44.143]) by kanga.kvack.org (Postfix) with ESMTP id 8A4BF280002 for ; Thu, 4 Jun 2020 19:46:10 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4861A374D for ; Thu, 4 Jun 2020 23:46:10 +0000 (UTC) X-FDA: 76893165300.08.game61_3807fbb26d9b Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 0D5151819E76F for ; Thu, 4 Jun 2020 23:46:10 +0000 (UTC) X-HE-Tag: game61_3807fbb26d9b X-Filterd-Recvd-Size: 3205 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Thu, 4 Jun 2020 23:46:09 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 77F60206A2; Thu, 4 Jun 2020 23:46:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591314368; bh=dTfWsvcicW8n05XUSHRUH20Lxn+9lZdMegkfatnx5HU=; h=Date:From:To:Subject:In-Reply-To:From; b=USAMae2AQjdNvVhrQU0fvGQiaxwDGRa1KKfi5vO7yu9xDxSIp3kvdbMlCAg6db0YU bHcFDZmDso6EP7jzpC9DXCfTftnlvqLwwDSsBKDT5LHfeESSB4lB66VS8Q9xy/LfsL P+JXYc1SvAjTosBWUhvvNz6lP/l5oeG6ZVLTTB28= Date: Thu, 04 Jun 2020 16:46:08 -0700 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@gmail.com, andreyknvl@google.com, dvyukov@google.com, elver@google.com, glider@google.com, gregkh@linuxfoundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, stern@rowland.harvard.edu, torvalds@linux-foundation.org Subject: [patch 007/127] usb: core: kcov: collect coverage from usb complete callback Message-ID: <20200604234608.8fH2tW1N9%akpm@linux-foundation.org> In-Reply-To: <20200604164523.e15f3177f4b69dcb4f2534a1@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: 0D5151819E76F X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Andrey Konovalov Subject: usb: core: kcov: collect coverage from usb complete callback This patch adds kcov_remote_start/stop() callbacks around the urb complete() callback that is executed in softirq context when dummy_hcd is in use. As the result, kcov can be used to collect coverage from those callbacks, which is used to facilitate coverage-guided fuzzing with syzkaller. Link: http://lkml.kernel.org/r/4520671eeb604adbc2432c248b0c07fbaa5519ef.1585233617.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/2821d497ac1cdc0efb5e00df30271e4a67fc8009.1584655448.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Reviewed-by: Dmitry Vyukov Cc: Alan Stern Cc: Alexander Potapenko Cc: Andrey Konovalov Cc: Greg Kroah-Hartman Cc: Marco Elver Signed-off-by: Andrew Morton --- drivers/usb/core/hcd.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/usb/core/hcd.c~usb-core-kcov-collect-coverage-from-usb-complete-callback +++ a/drivers/usb/core/hcd.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include @@ -1645,7 +1646,9 @@ static void __usb_hcd_giveback_urb(struc /* pass ownership to the completion handler */ urb->status = status; + kcov_remote_start_usb((u64)urb->dev->bus->busnum); urb->complete(urb); + kcov_remote_stop(); usb_anchor_resume_wakeups(anchor); atomic_dec(&urb->use_count); _