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 EDCE6C433EF for ; Sat, 20 Nov 2021 17:17:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237868AbhKTRUW (ORCPT ); Sat, 20 Nov 2021 12:20:22 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:37580 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237855AbhKTRUU (ORCPT ); Sat, 20 Nov 2021 12:20:20 -0500 Received: by mail-il1-f198.google.com with SMTP id l5-20020a056e0212e500b0026b231dfd46so8191835iln.4 for ; Sat, 20 Nov 2021 09:17:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=AAuw6DYnNuT5kGynq+Z3OS5Zc/huVEbpekGBKTmWTd4=; b=yzBXqw9rTp/+wzWcJgQG6dIKAMB1tBPUBLm2IXe6ZN3EnfCZhIPe+Dngg3Cc2Zmxtk QhoZpjIMsdSqLJvq/U7KccFExGcRoi7PUqsNWQpSqHcVDSRq9ZnkOp2INLI6+nP6E9Mr dyoDf4Kx1EBwvia8TtHK2lecghduZNz0FOPcV9f1nt+MLYclRkkyIl19DmHld515S5+e S2OoxPjG2D/2URgF1WLO6UefqmuJ3o0ZaXnfAphXpVorrxOSOYDOPpSVONd4MxhXbKYY k/sm7L5JqgsokUspWRQophoS6f9W9xCiGg8ehev9ZtXW/Jt+6LzgQwDxUoeoFRrc1uvZ k5vw== X-Gm-Message-State: AOAM532KfWr7lS1yRbW2wEhUewR26XNSPEqYmEkRV4DvRmkcCWO6+zl5 u8sTAKneo1cngbHxAuG0Cozwi+OFJL3WkLZF+xK4oCCtYeHT X-Google-Smtp-Source: ABdhPJxrM9FCNAvkF6nBH9JhZ2kROpJE05UpT9DvHjdkqSqITll3rOqk1ayfTLtNcg6XOQpMpjXGrQB9NgQhlLEVJ+vwJ2IDoh46 MIME-Version: 1.0 X-Received: by 2002:a05:6638:2395:: with SMTP id q21mr35261854jat.48.1637428636361; Sat, 20 Nov 2021 09:17:16 -0800 (PST) Date: Sat, 20 Nov 2021 09:17:16 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003728d105d13b90c7@google.com> Subject: [syzbot] INFO: task hung in blk_mq_freeze_queue (2) From: syzbot To: catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, maz@kernel.org, pcc@google.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: a90af8f15bdc Merge tag 'libata-5.16-rc2' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17d9e6deb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b128da186442e627 dashboard link: https://syzkaller.appspot.com/bug?extid=8ea6cf15ac5b5bb2f600 compiler: aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 userspace arch: arm Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8ea6cf15ac5b5bb2f600@syzkaller.appspotmail.com INFO: task syz-executor.0:11597 blocked for more than 430 seconds. Not tainted 5.16.0-rc1-syzkaller-00313-ga90af8f15bdc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid:11597 ppid: 2194 flags:0x00400001 Call trace: __switch_to+0x274/0x3b4 arch/arm64/kernel/process.c:526 context_switch kernel/sched/core.c:4972 [inline] __schedule+0x818/0x1be0 kernel/sched/core.c:6253 schedule+0xb8/0x224 kernel/sched/core.c:6326 blk_mq_freeze_queue_wait+0xf4/0x130 block/blk-mq.c:178 blk_freeze_queue block/blk-mq.c:205 [inline] blk_mq_freeze_queue+0x20/0x30 block/blk-mq.c:214 nbd_add_socket+0x134/0x690 drivers/block/nbd.c:1109 __nbd_ioctl drivers/block/nbd.c:1454 [inline] nbd_ioctl+0x42c/0x8f0 drivers/block/nbd.c:1511 compat_blkdev_ioctl+0x774/0x9a0 block/ioctl.c:674 __do_compat_sys_ioctl fs/ioctl.c:972 [inline] __se_compat_sys_ioctl fs/ioctl.c:914 [inline] __arm64_compat_sys_ioctl+0x1d0/0x220 fs/ioctl.c:914 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:187 el0_svc_compat+0x64/0x290 arch/arm64/kernel/entry-common.c:736 el0t_32_sync_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:746 el0t_32_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:577 INFO: task syz-executor.0:11605 blocked for more than 430 seconds. Not tainted 5.16.0-rc1-syzkaller-00313-ga90af8f15bdc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid:11605 ppid: 2194 flags:0x00400001 Call trace: __switch_to+0x274/0x3b4 arch/arm64/kernel/process.c:526 context_switch kernel/sched/core.c:4972 [inline] __schedule+0x818/0x1be0 kernel/sched/core.c:6253 schedule+0xb8/0x224 kernel/sched/core.c:6326 schedule_preempt_disabled+0x18/0x30 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0x3c0/0x7ec kernel/locking/mutex.c:740 mutex_lock_nested+0x78/0x100 kernel/locking/mutex.c:792 nbd_ioctl+0x108/0x8f0 drivers/block/nbd.c:1504 compat_blkdev_ioctl+0x774/0x9a0 block/ioctl.c:674 __do_compat_sys_ioctl fs/ioctl.c:972 [inline] __se_compat_sys_ioctl fs/ioctl.c:914 [inline] __arm64_compat_sys_ioctl+0x1d0/0x220 fs/ioctl.c:914 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:187 el0_svc_compat+0x64/0x290 arch/arm64/kernel/entry-common.c:736 el0t_32_sync_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:746 el0t_32_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:577 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800015e18f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x74/0x25c kernel/locking/lockdep.c:6460 1 lock held by syslogd/1983: 1 lock held by klogd/1987: 2 locks held by getty/2147: #0: ffff000013dc7098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001886b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x810/0xbe0 drivers/tty/n_tty.c:2113 3 locks held by kworker/0:1/5652: 2 locks held by kworker/u4:0/8438: 1 lock held by syz-executor.0/11597: #0: ffff0000105d4198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x108/0x8f0 drivers/block/nbd.c:1504 1 lock held by syz-executor.0/11605: #0: ffff0000105d4198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x108/0x8f0 drivers/block/nbd.c:1504 3 locks held by kworker/1:0/11606: ============================================= --- This report is generated by a bot. 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