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 96261C54E76 for ; Sun, 19 Nov 2023 12:53:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230490AbjKSMxJ (ORCPT ); Sun, 19 Nov 2023 07:53:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229703AbjKSMxI (ORCPT ); Sun, 19 Nov 2023 07:53:08 -0500 Received: from mail-pl1-f198.google.com (mail-pl1-f198.google.com [209.85.214.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D3D8B9 for ; Sun, 19 Nov 2023 04:53:04 -0800 (PST) Received: by mail-pl1-f198.google.com with SMTP id d9443c01a7336-1cc0e3a2b6eso41667085ad.3 for ; Sun, 19 Nov 2023 04:53:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700398384; x=1701003184; 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=dO803xkdRj9kB06cIVGlaKZxWCXTKF1nFQmCOMJNUZo=; b=sPrKDAS2cmqKu9J3a6laWWZzpNSIHRBWsGnrdxPzYbZagxG2iKyqgwt5onoyzmqV7x gxArFzIK3of8808khX9boaiOVcd34tPbeefsj2ePyM+ZLfA6PoWrFigu/qM7WhFfo5f8 PxhAi+uAooCJqndeA2IJA2P1rNa3y4OkR2r6ztNy31TYa1XlxJ6Wns9oBtRGKt1PSvD4 7vdx69UsjjFOov90lmnWIczVKTVzK7lYBwDEHzfcCl8HN1agSwyQ7D9VPp9gZmxVa0bk 678Q329yU4FiQnJwIqH34zI+F0YfYRbEtvkuNY4K4DaZVf5IzKfNARl8zZc/BsGXuZ6e jv6w== X-Gm-Message-State: AOJu0Yzb8xXVn/G0N0Fo5N+fNjE7w6OFwizkBPwwhJySnOlKoDyKUmdl Z10XJQuVivK/K5UG5I5izWYz18EwQHxCFSXqUA9RptOLOzjlJTk= X-Google-Smtp-Source: AGHT+IGGHHjOe+T5OHanxql16OLxL7CVngOWf/BDDj2C2iqWP318eebUtAkXYBxmJtJmRQ89vlvJQDalQkcDEVYG3NKzEFpz1AiA MIME-Version: 1.0 X-Received: by 2002:a17:903:2684:b0:1cc:335b:c923 with SMTP id jf4-20020a170903268400b001cc335bc923mr1228444plb.2.1700398384058; Sun, 19 Nov 2023 04:53:04 -0800 (PST) Date: Sun, 19 Nov 2023 04:53:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a896e8060a80d978@google.com> Subject: Re: [syzbot] [fs?] INFO: task hung in user_get_super (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tintinm2017@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in user_get_super INFO: task syz-executor.0:6844 blocked for more than 143 seconds. Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:6844 tgid:6842 ppid:6827 flags:0x00000005 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5376 [inline] __schedule+0x1354/0x2360 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6778 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6835 rwsem_down_read_slowpath+0x57c/0xe58 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0xa0/0x2fc kernel/locking/rwsem.c:1528 __super_lock fs/super.c:58 [inline] super_lock+0x160/0x328 fs/super.c:117 user_get_super+0xe8/0x1a0 fs/super.c:1062 quotactl_block fs/quota/quota.c:890 [inline] __do_sys_quotactl fs/quota/quota.c:955 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __arm64_sys_quotactl+0x508/0xca0 fs/quota/quota.c:917 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008e6b46c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:300 2 locks held by getty/5857: #0: ffff0000d2bdf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094e702f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.0/6551: 1 lock held by syz-executor.0/6844: #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117 1 lock held by syz-executor.0/6862: #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117 1 lock held by syz-executor.0/6888: #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000da0280e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117 ============================================= Tested on: commit: 037266a5 Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=12cbee48e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=696dc362ad4818c4 dashboard link: https://syzkaller.appspot.com/bug?extid=ba09f4a317431df6cddf compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Note: no patches were applied.