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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5467AC0015E for ; Fri, 28 Jul 2023 08:22:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234939AbjG1IW3 (ORCPT ); Fri, 28 Jul 2023 04:22:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233612AbjG1IV4 (ORCPT ); Fri, 28 Jul 2023 04:21:56 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D78F4699 for ; Fri, 28 Jul 2023 01:20:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690532414; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NLSkFu1+A4B2qEl4uWLWn7fu2Ya9+djJ2h/pmkBMuP8=; b=CPRu9MP4n5/Q4N58trZkUZPr+3IAA/ufkfY4cEUIYY/zjCRZWcNYywFZMnlY55QyAwSCVp e9ZhTd9xCgZVhJ+lSbs1yDwHeWyo0JAVD402hvayv6SbNs96dSH2JGVkcWZfb9jBLs6YMH zaQp+BSGtdxNR76mfBTOuMhrnEFbDbQ= Received: from mimecast-mx02.redhat.com (66.187.233.73 [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-255-XhVk2cZrOoK3GDarM8I35Q-1; Fri, 28 Jul 2023 04:20:11 -0400 X-MC-Unique: XhVk2cZrOoK3GDarM8I35Q-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D6CFF3C0BE3B; Fri, 28 Jul 2023 08:20:10 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id 87B18492C13; Fri, 28 Jul 2023 08:20:09 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <00000000000045a44b0601802056@google.com> References: <00000000000045a44b0601802056@google.com> To: syzbot Cc: dhowells@redhat.com, agruenba@redhat.com, arnd@arndb.de, cluster-devel@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, rpeterso@redhat.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Subject: Re: [syzbot] [gfs2?] kernel panic: hung_task: blocked tasks (2) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <200477.1690532408.1@warthog.procyon.org.uk> Content-Transfer-Encoding: quoted-printable Date: Fri, 28 Jul 2023 09:20:08 +0100 Message-ID: <200478.1690532408@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot wrote: > Fixes: 9c8ad7a2ff0b ("uapi, x86: Fix the syscall numbering of the mount = API syscalls [ver #2]") This would seem unlikely to be the culprit. It just changes the numbering= on the fsconfig-related syscalls. Running the test program on v6.5-rc3, however, I end up with the test proc= ess stuck in the D state: INFO: task repro-17687f1aa:5551 blocked for more than 120 seconds. Not tainted 6.5.0-rc3-build3+ #1448 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:repro-17687f1aa state:D stack:0 pid:5551 ppid:5516 flags:0x000= 04002 Call Trace: __schedule+0x4a7/0x4f1 schedule+0x66/0xa1 schedule_timeout+0x9d/0xd7 ? __next_timer_interrupt+0xf6/0xf6 gfs2_gl_hash_clear+0xa0/0xdc ? sugov_irq_work+0x15/0x15 gfs2_put_super+0x19f/0x1d3 generic_shutdown_super+0x78/0x187 kill_block_super+0x1c/0x32 deactivate_locked_super+0x2f/0x61 cleanup_mnt+0xab/0xcc task_work_run+0x6b/0x80 exit_to_user_mode_prepare+0x76/0xfd syscall_exit_to_user_mode+0x14/0x31 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f89aac31dab RSP: 002b:00007fff43d9b878 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fff43d9cad8 RCX: 00007f89aac31dab RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff43d9b920 RBP: 00007fff43d9c960 R08: 0000000000000000 R09: 0000000000000073 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fff43d9cae8 R14: 0000000000417e18 R15: 00007f89aad51000 David