From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 060E314C596 for ; Thu, 11 Jul 2024 22:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720738104; cv=none; b=AdHXDlRUzCBtcTPEtEXKnIRXTelQGQDRX2Cupwd1QUfb36fRS9iY1aRzF/bS9u60OP3SxIf72zLJ6ih8Bc7Ywee4dfBJMWLQfP8/A3ITilJL7Q7gbo6FQtiZHH0MD44RJFl0KCEKbpvkgkdJedBkOqiLlac1kzH5G4C0PoxThvg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720738104; c=relaxed/simple; bh=XaG/9uIDsbKCKW28ID0XVFdhixA/ARTIJWXk14Wwnio=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=c1idyb98E3MXr6bsQJRgEI6pMJGhde7VE62n8l0g+G6oafoFob3701puI0zqdv+1ZukXmxR1b+mwwh+VCFDvHnIobZ8H3J+C3VL8EhM92Nwl936ZVEtrkfiFr8OY0p4iibNprQ1/9kC4SATww2B62sJ4BKEUQjiGcxhn3v0or8c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f71.google.com with SMTP id ca18e2360f4ac-7fc9fc043eeso141051739f.3 for ; Thu, 11 Jul 2024 15:48:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720738101; x=1721342901; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=kUq4mFKYDUuOJA1So/dtgBjRUV3ymcjMLfVqKXZl6wE=; b=rXcj23cIWnWRBxbcTG5P1pA7LwTDcYjUgA7yDCme5zTH6WEYeMmx0ZzZN10aqCdalB naiOXVFTmVbE/HRVxwozFBdmgqzHpD//Y8KehRTMoa0bAibl2hz2SZZPGTR+O/NHVUqE PxccYwB6ffnnRXw4IHmHeoKfzcKcsNSgkCHx8l8CwitnJEZ22wjdg0bl7pDMpZdG9O4X 6pHQpTnw+A8FaagdUpJ9ixRMmY1pa8NZq9EzibJ1aMYoQl6IYZE8dy3ORUlMzkKkh80+ nF0E4IW8mW0WLOrdfHvK39njEw7Pn3H+MEe4uWCiFIeP8TtH18YboCaQr3DJPBM9A0UW 9XEA== X-Forwarded-Encrypted: i=1; AJvYcCV6cLkO5Kf7h2FkW7e0w44kUx8qU/dz6WzKLvwAyDSyzRevk2XPCKet2gj6XCW0EEwYQKDRQkP0wArz1Ir4zRxnGqv3yvL4 X-Gm-Message-State: AOJu0YyoSxXeYTf6rH2pVPr5pkNK0VDpQ4GcYvhA8Uqy8QD3D2TyJWYz YsHLWzllMVViUxVekqUqPN8bqY2KLE74svWkqH/rSrc0/Mt/RYv2fJAE+ykqlzhYsDW+rlhX16p oi2NhHGj34APihdNsNmJ2yPKcyMmHjvyhUohQHcWkRqrrM++sp8GvtHw= X-Google-Smtp-Source: AGHT+IEGY5HGsKCLCrGxeW/vnGc1Gjxmoz4d0jso6m89axV4BRpLjEuLu5o+X05VTUEG92vLDeh3Us4hhN+zvpd9+Z/1f/bVTFjc Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:150d:b0:4b9:13c9:b0fb with SMTP id 8926c6da1cb9f-4c0b2b78063mr598164173.5.1720738101184; Thu, 11 Jul 2024 15:48:21 -0700 (PDT) Date: Thu, 11 Jul 2024 15:48:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000045dc6e061d008fff@google.com> Subject: [syzbot] [net?] INFO: task hung in cleanup_net (7) From: syzbot To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c6653f49e4fd Merge tag 'powerpc-6.10-4' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16e85369980000 kernel config: https://syzkaller.appspot.com/x/.config?x=864caee5f78cab51 dashboard link: https://syzkaller.appspot.com/bug?extid=09e91cb5dd034b2d3ad4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/883870bfa71b/disk-c6653f49.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f2d0f532ed6a/vmlinux-c6653f49.xz kernel image: https://storage.googleapis.com/syzbot-assets/14f12438424f/bzImage-c6653f49.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+09e91cb5dd034b2d3ad4@syzkaller.appspotmail.com INFO: task kworker/u8:6:1040 blocked for more than 143 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:6 state:D stack:22248 pid:1040 tgid:1040 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __flush_work+0xaa9/0xd00 kernel/workqueue.c:4227 flush_all_backlogs net/core/dev.c:6000 [inline] unregister_netdevice_many_notify+0x8a0/0x16b0 net/core/dev.c:11201 cleanup_net+0x75d/0xcc0 net/core/net_namespace.c:635 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/u8:9:2843 blocked for more than 144 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:9 state:D stack:23640 pid:2843 tgid:2843 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/1:2:2932 blocked for more than 145 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:25272 pid:2932 tgid:2932 ppid:2 flags:0x00004000 Workqueue: events request_firmware_work_func Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 regdb_fw_cb+0x82/0x1c0 net/wireless/reg.c:1017 request_firmware_work_func+0x1a4/0x280 drivers/base/firmware_loader/main.c:1167 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task dhcpcd:4760 blocked for more than 146 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:20384 pid:4760 tgid:4760 ppid:4759 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585 ___sys_sendmsg net/socket.c:2639 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbaa016fa4b RSP: 002b:00007ffecf670818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbaa00976c0 RCX: 00007fbaa016fa4b RDX: 0000000000000000 RSI: 00007ffecf6849c8 RDI: 0000000000000010 RBP: 0000000000000010 R08: 0000000000000000 R09: 00007ffecf6849c8 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff R13: 00007ffecf6849c8 R14: 0000000000000030 R15: 0000000000000001 INFO: task kworker/1:4:5146 blocked for more than 147 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:24872 pid:5146 tgid:5146 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:276 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task udevd:5147 blocked for more than 148 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:24864 pid:5147 tgid:5147 ppid:4546 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 device_lock include/linux/device.h:1009 [inline] uevent_show+0x17d/0x340 drivers/base/core.c:2743 dev_attr_show+0x55/0xc0 drivers/base/core.c:2437 sysfs_kf_seq_show+0x331/0x4c0 fs/sysfs/file.c:59 seq_read_iter+0x445/0xd60 fs/seq_file.c:230 new_sync_read fs/read_write.c:395 [inline] vfs_read+0x9bd/0xbc0 fs/read_write.c:476 ksys_read+0x1a0/0x2c0 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8f25168b6a RSP: 002b:00007ffcd09cdd58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000557c6193d2c0 RCX: 00007f8f25168b6a RDX: 0000000000001000 RSI: 0000557c6192d930 RDI: 0000000000000008 RBP: 0000557c6193d2c0 R08: 0000000000000008 R09: 0000000000000008 R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000003fff R14: 00007ffcd09ce238 R15: 000000000000000a INFO: task kworker/1:6:5153 blocked for more than 148 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:20976 pid:5153 tgid:5153 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz.3.10:5176 blocked for more than 149 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.10 state:D stack:23776 pid:5176 tgid:5175 ppid:5109 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __flush_work+0xaa9/0xd00 kernel/workqueue.c:4227 __lru_add_drain_all+0x4f6/0x560 mm/swap.c:902 madvise_collapse+0x24b/0xcf0 mm/khugepaged.c:2712 madvise_vma_behavior mm/madvise.c:1094 [inline] madvise_walk_vmas mm/madvise.c:1268 [inline] do_madvise+0xc5f/0x4590 mm/madvise.c:1464 __do_sys_madvise mm/madvise.c:1481 [inline] __se_sys_madvise mm/madvise.c:1479 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1479 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd40bb75bd9 RSP: 002b:00007fd40c8d1048 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fd40bd03f60 RCX: 00007fd40bb75bd9 RDX: 0000000000000019 RSI: 0000000000600003 RDI: 0000000020000000 RBP: 00007fd40bbe4aa1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd40bd03f60 R15: 00007fd40be2fa68 INFO: task syz-executor:5178 blocked for more than 150 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:25840 pid:5178 tgid:5178 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 ops_init+0x359/0x610 net/core/net_namespace.c:139 setup_net+0x515/0xca0 net/core/net_namespace.c:343 copy_net_ns+0x4e2/0x7b0 net/core/net_namespace.c:508 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3323 __do_sys_unshare kernel/fork.c:3394 [inline] __se_sys_unshare kernel/fork.c:3392 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb0b9177337 RSP: 002b:00007fb0b942ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fb0b91e4be6 RCX: 00007fb0b9177337 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007fb0b9e37d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009 INFO: task syz.0.11:5180 blocked for more than 151 seconds. Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.11 state:D stack:24912 pid:5180 tgid:5180 ppid:5111 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __synchronize_srcu+0x357/0x400 kernel/rcu/srcutree.c:1396 nbd_clear_que drivers/block/nbd.c:960 [inline] nbd_clear_sock drivers/block/nbd.c:1335 [inline] nbd_config_put+0x3d2/0x7e0 drivers/block/nbd.c:1358 nbd_release+0x10b/0x130 drivers/block/nbd.c:1653 bdev_release+0x5e3/0x700 blkdev_release+0x15/0x20 block/fops.c:623 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa27/0x27e0 kernel/exit.c:876 do_group_exit+0x207/0x2c0 kernel/exit.c:1025 get_signal+0x16a1/0x1740 kernel/signal.c:2909 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f492bfa7bc5 RSP: 002b:00007f492c22fae0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: 0000000000000000 RBX: 00007f492c103f60 RCX: 00007f492bfa7bc5 RDX: 00007f492c22fb20 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f492c105a60 R08: 0000000000000000 R09: 7fffffffffffffff R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001769b R13: 000000000000015e R14: 00007f492c105a60 R15: 00007f492c22fc30 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 2 locks held by kworker/0:1/9: 5 locks held by kworker/u8:0/11: #0: ffff8880b953e798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9528948 ( --- This report is generated by a bot. 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