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[2620:137:e000::3:3]) by mx.google.com with ESMTPS id j7-20020a170902da8700b001cffe1808efsi4257010plx.558.2023.12.01.17.38.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 17:38:32 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id 0137A81E0FF3; Fri, 1 Dec 2023 17:38:08 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229582AbjLBBZC (ORCPT + 99 others); Fri, 1 Dec 2023 20:25:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229456AbjLBBZB (ORCPT ); Fri, 1 Dec 2023 20:25:01 -0500 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A428116 for ; Fri, 1 Dec 2023 17:25:07 -0800 (PST) Received: by mail-oo1-f71.google.com with SMTP id 006d021491bc7-58db2015327so2810940eaf.1 for ; Fri, 01 Dec 2023 17:25:07 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701480306; x=1702085106; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=R+idYJvm7kZteexJ00hgZc6UHQFg380Sn+VulJa8JKk=; b=WWwkZgt438D6vWvSGBpyHYpXA7yogBaby4yTAtoF9ZSdOpuzYQR25KjsSZW/6hEW9A wTXJIIO6j/91Y8aId+U/W28UzFIaEhbGjUUAKt/CvycFxRD/+szFXeEuYNEJqHFGO+3a CSKZUJcRnePM4DHrRZWtWyWhjhQnI3WN6RcojLQ2DaRIWiv2Y6eKA3ZUwPaFaBg6dUTX 3OEjFtL4/EJHfz6gft4SxXE/BQF0zyx244h7z04F3ojUFMXnctfQ5ZR7+pLYThhtlg8L sP6Xz5rKTHIK4yDbMuTtwN/vsj3Jn0JprTi4ozWEI94GL8ffgyaQyJnkGOY2kpa0GbyX 7URg== X-Gm-Message-State: AOJu0YyX+l2iOzE1Q6J6NUFqHmzvO0kSrTbVseNfVTFfIsl6caAI5YkP vBeFU8uN2I+xRbKKS+SibiV2+S4BoITfMt+c67+rhMd0tICu8/k= MIME-Version: 1.0 X-Received: by 2002:a05:6820:175:b0:58a:12d8:dbce with SMTP id k21-20020a056820017500b0058a12d8dbcemr384568ood.0.1701480306441; Fri, 01 Dec 2023 17:25:06 -0800 (PST) Date: Fri, 01 Dec 2023 17:25:06 -0800 In-Reply-To: <00000000000047eb7e060b652d9a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000420309060b7cc1bd@google.com> Subject: Re: [syzbot] [block?] [trace?] INFO: task hung in blk_trace_ioctl From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-0.4 required=5.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Fri, 01 Dec 2023 17:38:08 -0800 (PST) For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [block?] [trace?] INFO: task hung in blk_trace_ioctl Author: eadavis@qq.com please test task hung in blk_trace_ioctl #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 8c9660f65153 diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index d5d94510af..54ade89a1a 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -588,8 +588,10 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev, debugfs_create_file("dropped", 0444, dir, bt, &blk_dropped_fops); debugfs_create_file("msg", 0222, dir, bt, &blk_msg_fops); + mutex_unlock(&q->debugfs_mutex); bt->rchan = relay_open("trace", dir, buts->buf_size, buts->buf_nr, &blk_relay_callbacks, bt); + mutex_lock(&q->debugfs_mutex); if (!bt->rchan) goto err;