batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_1 Bluetooth: hci5 command 0x0406 tx timeout BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 269s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=19/256 refcnt=20 in-flight: 7999:rtc_timer_do_work pending: defense_work_handler, defense_work_handler, cache_reap, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, linkwatch_event, hci_cmd_timeout, l2cap_info_timeout, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout workqueue events_long: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: gc_worker workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=7 in-flight: 9784:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 5:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn workqueue events_freezable: flags=0x4 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: update_balloon_stats_func workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=5/256 refcnt=6 pending: do_cache_clean, process_srcu, process_srcu, neigh_periodic_work, process_srcu workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=4 pending: lru_add_drain_per_cpu BAR(7993), vmstat_update workqueue dm_bufio_cache: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: work_fn workqueue ipv6_addrconf: flags=0x40008 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=4 pending: addrconf_dad_work delayed: addrconf_dad_work, addrconf_dad_work workqueue bat_events: flags=0xe000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=15 pending: batadv_bla_periodic_work delayed: batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_purge_orig, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=269s workers=5 idle: 24 19 9081 4315 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 2880 78 23 2727 3504 INFO: task kworker/u4:0:5 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D28952 5 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 INFO: task syz-executor.1:7991 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25632 7991 7986 0x00000000 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lru_add_drain_all_cpuslocked+0x6c/0x450 mm/swap.c:704 lru_add_drain_all+0xf/0x20 mm/swap.c:730 invalidate_bdev+0x8a/0xc0 fs/block_dev.c:109 ext4_put_super+0x66d/0xf00 fs/ext4/super.c:968 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f7148b6a6e7 RSP: 002b:00007ffcad353938 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f7148b6a6e7 RDX: 00007ffcad353a0a RSI: 000000000000000a RDI: 00007ffcad353a00 RBP: 00007ffcad353a00 R08: 00000000ffffffff R09: 00007ffcad3537d0 R10: 00005555570ae903 R11: 0000000000000246 R12: 00007f7148bc242e R13: 00007ffcad354ac0 R14: 00005555570ae810 R15: 00007ffcad354b00 INFO: task syz-executor.4:7993 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25840 7993 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 flush_work+0x3fe/0x770 kernel/workqueue.c:2894 lru_add_drain_all_cpuslocked+0x2e6/0x450 mm/swap.c:722 lru_add_drain_all+0xf/0x20 mm/swap.c:730 invalidate_bdev+0x8a/0xc0 fs/block_dev.c:109 ext4_put_super+0x66d/0xf00 fs/ext4/super.c:968 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fd299b776e7 RSP: 002b:00007ffeeefb2c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd299b776e7 RDX: 00007ffeeefb2cea RSI: 000000000000000a RDI: 00007ffeeefb2ce0 RBP: 00007ffeeefb2ce0 R08: 00000000ffffffff R09: 00007ffeeefb2ab0 R10: 0000555555bcd903 R11: 0000000000000246 R12: 00007fd299bcf42e R13: 00007ffeeefb3da0 R14: 0000555555bcd810 R15: 00007ffeeefb3de0 INFO: task syz-executor.0:7997 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25840 7997 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 lru_add_drain_all_cpuslocked+0x6c/0x450 mm/swap.c:704 lru_add_drain_all+0xf/0x20 mm/swap.c:730 invalidate_bdev+0x8a/0xc0 fs/block_dev.c:109 ext4_put_super+0x66d/0xf00 fs/ext4/super.c:968 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f75f25836e7 RSP: 002b:00007ffdbf2d0248 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f75f25836e7 RDX: 00007ffdbf2d031a RSI: 000000000000000a RDI: 00007ffdbf2d0310 RBP: 00007ffdbf2d0310 R08: 00000000ffffffff R09: 00007ffdbf2d00e0 R10: 0000555555740903 R11: 0000000000000246 R12: 00007f75f25db42e R13: 00007ffdbf2d13d0 R14: 0000555555740810 R15: 00007ffdbf2d1410 INFO: task kworker/u4:6:9784 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:6 D29224 9784 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xed/0x2e0 fs/notify/mark.c:757 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 INFO: task syz-executor.3:10946 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29520 10946 7996 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 kvm_io_bus_register_dev+0x255/0x3f0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3718 kvm_assign_ioeventfd_idx+0x584/0x9e0 arch/x86/kvm/../../../virt/kvm/eventfd.c:828 kvm_assign_ioeventfd arch/x86/kvm/../../../virt/kvm/eventfd.c:936 [inline] kvm_ioeventfd+0x142/0x2b0 arch/x86/kvm/../../../virt/kvm/eventfd.c:963 kvm_vm_ioctl+0x2a3/0x1420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3151 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f6861310279 RSP: 002b:00007f685fc85168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6861422f80 RCX: 00007f6861310279 RDX: 00000000200000c0 RSI: 000000004040ae79 RDI: 0000000000000004 RBP: 00007f686136a2e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5dd1162f R14: 00007f685fc85300 R15: 0000000000022000 INFO: task syz-executor.3:10961 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D30032 10961 7996 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 kvm_deassign_ioeventfd_idx+0x83/0x6f0 arch/x86/kvm/../../../virt/kvm/eventfd.c:863 kvm_deassign_ioeventfd arch/x86/kvm/../../../virt/kvm/eventfd.c:897 [inline] kvm_ioeventfd+0x1d7/0x2b0 arch/x86/kvm/../../../virt/kvm/eventfd.c:961 kvm_vm_ioctl+0x2a3/0x1420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3151 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f6861310279 RSP: 002b:00007f685fc64168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6861423050 RCX: 00007f6861310279 RDX: 0000000020000080 RSI: 000000004040ae79 RDI: 0000000000000004 RBP: 00007f686136a2e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5dd1162f R14: 00007f685fc64300 R15: 0000000000022000 INFO: task syz-executor.2:10985 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28912 10985 7987 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 debugfs_remove_recursive fs/debugfs/inode.c:744 [inline] debugfs_remove_recursive+0x2e0/0x3b0 fs/debugfs/inode.c:686 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:585 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:776 [inline] kvm_put_kvm+0xec/0xab0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:830 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f50b30e5ebb RSP: 002b:00007ffde7a4fe30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f50b30e5ebb RDX: 00007f50b324a2c0 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007f50b3247980 R08: 0000000000000000 R09: 00007f50b324a2c8 R10: 00007ffde7a4ff30 R11: 0000000000000293 R12: 0000000000034382 R13: 00007ffde7a4ff30 R14: 00007f50b3245f80 R15: 0000000000000032 INFO: task syz-executor.3:11236 blocked for more than 140 seconds. Not tainted 4.14.291-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28912 11236 10997 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 debugfs_remove_recursive fs/debugfs/inode.c:744 [inline] debugfs_remove_recursive+0x2e0/0x3b0 fs/debugfs/inode.c:686 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:585 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:776 [inline] kvm_put_kvm+0xec/0xab0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:830 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f37b7e28ebb RSP: 002b:00007ffe5d98ed70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f37b7e28ebb RDX: 00007f37b7f8d4a8 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007f37b7f8a980 R08: 0000000000000000 R09: 00007f37b7f8d4b0 R10: 00007ffe5d98ee70 R11: 0000000000000293 R12: 00000000000356cf R13: 00007ffe5d98ee70 R14: 00007f37b7f88f80 R15: 0000000000000032 Showing all locks held in the system: 2 locks held by kworker/u4:0/5: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (connector_reaper_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 3 locks held by syz-executor.1/7991: #0: (&type->s_umount_key#37){++++}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:149 [inline] #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] lru_add_drain_all+0xa/0x20 mm/swap.c:729 #2: (lock#6){+.+.}, at: [] lru_add_drain_all_cpuslocked+0x6c/0x450 mm/swap.c:704 3 locks held by syz-executor.4/7993: #0: (&type->s_umount_key#37){++++}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:149 [inline] #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] lru_add_drain_all+0xa/0x20 mm/swap.c:729 #2: (lock#6){+.+.}, at: [] lru_add_drain_all_cpuslocked+0x6c/0x450 mm/swap.c:704 3 locks held by syz-executor.0/7997: #0: (&type->s_umount_key#37){++++}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:149 [inline] #1: (cpu_hotplug_lock.rw_sem){++++}, at: [] lru_add_drain_all+0xa/0x20 mm/swap.c:729 #2: (lock#6){+.+.}, at: [] lru_add_drain_all_cpuslocked+0x6c/0x450 mm/swap.c:704 2 locks held by kworker/u4:6/9784: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 1 lock held by syz-executor.3/10946: #0: (&kvm->slots_lock){+.+.}, at: [] kvm_assign_ioeventfd_idx+0x270/0x9e0 arch/x86/kvm/../../../virt/kvm/eventfd.c:818 1 lock held by syz-executor.3/10961: #0: (&kvm->slots_lock){+.+.}, at: [] kvm_deassign_ioeventfd_idx+0x83/0x6f0 arch/x86/kvm/../../../virt/kvm/eventfd.c:863 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.291-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7999 Comm: kworker/1:3 Not tainted 4.14.291-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: events rtc_timer_do_work task: ffff8880a5e8e180 task.stack: ffff888091198000 RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0xc/0x12 RSP: 0018:ffff88809119fb60 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000286 RCX: 1ffff11014bd1d50 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88823794b2c8 RBP: ffff88823794b2c8 R08: ffffffff8b9bfa10 R09: 0000000000000003 R10: 0000000000000000 R11: ffff8880a5e8e180 R12: ffff88823794b2d0 R13: ffff88823794b2d8 R14: ffff88823794b420 R15: ffffffff84b0b920 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f49989e4000 CR3: 00000000a1a8f000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:674 [inline] queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline] do_raw_spin_unlock+0x164/0x220 kernel/locking/spinlock_debug.c:135 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irqrestore+0x23/0xe0 kernel/locking/spinlock.c:192 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] rtc_handle_legacy_irq+0x7a/0x180 drivers/rtc/interface.c:515 rtc_timer_do_work+0x1f7/0x5a0 drivers/rtc/interface.c:881 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 52 56 57 41 50 41 51 41 52 41 53 e8 ef 10 00 00 41 5b 41 5a 41 59 41 58 5f 5e 5a 59 c3 66 90 52 b8 01 00 00 00 31 d2 f0 0f b0 17 <3c> 01 75 02 5a c3 56 0f b6 f0 e8 c5 ff ff ff 5e 5a c3 66 90 41 ---------------- Code disassembly (best guess): 0: 52 push %rdx 1: 56 push %rsi 2: 57 push %rdi 3: 41 50 push %r8 5: 41 51 push %r9 7: 41 52 push %r10 9: 41 53 push %r11 b: e8 ef 10 00 00 callq 0x10ff 10: 41 5b pop %r11 12: 41 5a pop %r10 14: 41 59 pop %r9 16: 41 58 pop %r8 18: 5f pop %rdi 19: 5e pop %rsi 1a: 5a pop %rdx 1b: 59 pop %rcx 1c: c3 retq 1d: 66 90 xchg %ax,%ax 1f: 52 push %rdx 20: b8 01 00 00 00 mov $0x1,%eax 25: 31 d2 xor %edx,%edx 27: f0 0f b0 17 lock cmpxchg %dl,(%rdi) * 2b: 3c 01 cmp $0x1,%al <-- trapping instruction 2d: 75 02 jne 0x31 2f: 5a pop %rdx 30: c3 retq 31: 56 push %rsi 32: 0f b6 f0 movzbl %al,%esi 35: e8 c5 ff ff ff callq 0xffffffff 3a: 5e pop %rsi 3b: 5a pop %rdx 3c: c3 retq 3d: 66 90 xchg %ax,%ax 3f: 41 rex.B