INFO: task syz-executor:294 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:294   tgid:294   ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
 __schedule_loop kernel/sched/core.c:7924 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7939
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7996
 rwsem_down_write_slowpath+0x5b0/0x1bb0 kernel/locking/rwsem.c:1239
 __down_write_common kernel/locking/rwsem.c:1383 [inline]
 __down_write kernel/locking/rwsem.c:1392 [inline]
 down_write+0x163/0x2b0 kernel/locking/rwsem.c:1659
 namespace_lock fs/namespace.c:1720 [inline]
 drop_collected_mounts fs/namespace.c:2234 [inline]
 put_mnt_ns+0x7a/0xf0 fs/namespace.c:5645
 free_nsproxy+0x52/0x290 kernel/nsproxy.c:193
 put_nsproxy include/linux/nsproxy.h:118 [inline]
 switch_task_namespaces kernel/nsproxy.c:251 [inline]
 exit_task_namespaces+0x99/0xe0 kernel/nsproxy.c:256
 do_exit+0x9de/0x2650 kernel/exit.c:952
 do_group_exit+0x229/0x2f0 kernel/exit.c:1095
 get_signal+0x1398/0x14e0 kernel/signal.c:2933
 arch_do_signal_or_restart+0xbc/0x760 arch/x86/kernel/signal.c:337
 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+0x57/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fb39e557197
RSP: 002b:00007ffe28667660 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: fffffffffffffe00 RBX: 000055556176a500 RCX: 00007fb39e557197
RDX: 0000000000000000 RSI: 00007ffe286677b0 RDI: ffffffffffffff9c
RBP: 00007ffe286677b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe28668840
R13: 00007fb39e631c3b R14: 000055556176a4e8 R15: 00007ffe28668880
 </TASK>
INFO: task kworker/u8:4:330 blocked for more than 124 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:4    state:D stack:0     pid:330   tgid:330   ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
 __schedule_loop kernel/sched/core.c:7924 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7939
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7996
 __mutex_lock_common kernel/locking/mutex.c:707 [inline]
 __mutex_lock+0x960/0x1bb0 kernel/locking/mutex.c:803
 __mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
 mutex_lock+0x113/0x1d0 kernel/locking/mutex.c:285
 rtnl_lock+0x19/0x20 net/core/rtnetlink.c:79
 addrconf_dad_work+0xce/0x1530 net/ipv6/addrconf.c:4234
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d4/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc70/0x10b0 kernel/workqueue.c:3400
 kthread+0x2c9/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/1:6:960 blocked for more than 126 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D stack:0     pid:960   tgid:960   ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
 __schedule_loop kernel/sched/core.c:7924 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7939
 schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x369/0x650 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 devtmpfs_submit_req drivers/base/devtmpfs.c:107 [inline]
 devtmpfs_delete_node+0x16d/0x200 drivers/base/devtmpfs.c:156
 device_del+0x2d2/0xd00 drivers/base/core.c:3860
 device_unregister drivers/base/core.c:3922 [inline]
 device_destroy+0xb0/0x100 drivers/base/core.c:4521
 usb_deregister_dev+0x6c/0x190 drivers/usb/core/file.c:184
 hiddev_disconnect+0x8b/0x190 drivers/hid/usbhid/hiddev.c:932
 hid_disconnect drivers/hid/hid-core.c:2325 [inline]
 hid_hw_stop drivers/hid/hid-core.c:2372 [inline]
 hid_device_remove+0x1bd/0x3f0 drivers/hid/hid-core.c:2761
 device_remove drivers/base/dd.c:567 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x45f/0x790 drivers/base/dd.c:1295
 device_release_driver+0x1d/0x30 drivers/base/dd.c:1318
 bus_remove_device+0x359/0x380 drivers/base/bus.c:576
 device_del+0x581/0xd00 drivers/base/core.c:3881
 hid_remove_device drivers/hid/hid-core.c:2943 [inline]
 hid_destroy_device+0x6e/0x110 drivers/hid/hid-core.c:2963
 usbhid_disconnect+0xa3/0xc0 drivers/hid/usbhid/hid-core.c:1462
 usb_unbind_interface+0x2a7/0xa30 drivers/usb/core/driver.c:462
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4c5/0x790 drivers/base/dd.c:1295
 device_release_driver+0x1d/0x30 drivers/base/dd.c:1318
 bus_remove_device+0x359/0x380 drivers/base/bus.c:576
 device_del+0x581/0xd00 drivers/base/core.c:3881
 usb_disable_device+0x3af/0x770 drivers/usb/core/message.c:1418
 usb_disconnect+0x322/0x930 drivers/usb/core/hub.c:2353
 hub_port_connect drivers/usb/core/hub.c:5414 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5714 [inline]
 port_event drivers/usb/core/hub.c:5878 [inline]
 hub_event+0x1c7a/0x4700 drivers/usb/core/hub.c:5960
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d4/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc70/0x10b0 kernel/workqueue.c:3400
 kthread+0x2c9/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.1.728:2649 blocked for more than 129 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.728       state:D stack:0     pid:2649  tgid:2649  ppid:289    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
 __schedule_loop kernel/sched/core.c:7924 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7939
 synchronize_rcu_expedited+0x6eb/0x970 kernel/rcu/tree_exp.h:994
 synchronize_net+0x2c/0x40 net/core/dev.c:11374
 __tun_detach+0x774/0x1460 drivers/net/tun.c:669
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x93/0x150 drivers/net/tun.c:3520
 __fput+0x1fb/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e5/0x260 kernel/task_work.c:246
 resume_user_mode_work+0x35/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x63/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f27f899bf79
RSP: 002b:00007ffef1ef04d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f27f8c17da0 RCX: 00007f27f899bf79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f27f8c17da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f27f8c17cb0 R11: 0000000000000246 R12: 0000000000021141
R13: 00007f27f8c1618c R14: 0000000000020f17 R15: 00007f27f8c16180
 </TASK>
INFO: task syz.1.728:2651 blocked for more than 130 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.728       state:D stack:0     pid:2651  tgid:2649  ppid:289    flags:0x00000024
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
 __schedule_loop kernel/sched/core.c:7924 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7939
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7996
 rwsem_down_read_slowpath+0x6fb/0x1490 kernel/locking/rwsem.c:1136
 __down_read_common kernel/locking/rwsem.c:1317 [inline]
 __down_read kernel/locking/rwsem.c:1330 [inline]
 down_read+0x95/0xe0 kernel/locking/rwsem.c:1607
 clone_private_mount+0x4c/0x320 fs/namespace.c:2280
 ovl_get_upper fs/overlayfs/super.c:496 [inline]
 ovl_fill_super+0xef6/0x38f0 fs/overlayfs/super.c:1367
 vfs_get_super fs/super.c:1283 [inline]
 get_tree_nodev+0xce/0x170 fs/super.c:1302
 ovl_get_tree+0x20/0x30 fs/overlayfs/params.c:610
 vfs_get_tree+0xa1/0x290 fs/super.c:1817
 do_new_mount+0x251/0xb30 fs/namespace.c:3557
 path_mount+0x682/0x1010 fs/namespace.c:3884
 do_mount fs/namespace.c:3897 [inline]
 __do_sys_mount fs/namespace.c:4107 [inline]
 __se_sys_mount+0x2bf/0x480 fs/namespace.c:4084
 __x64_sys_mount+0xc3/0xf0 fs/namespace.c:4084
 x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f27f899bf79
RSP: 002b:00007f27f73f7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f27f8c16090 RCX: 00007f27f899bf79
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007f27f8a327e0 R08: 0000200000000a00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f27f8c16128 R14: 00007f27f8c16090 R15: 00007ffef1ef0378
 </TASK>