batman_adv: batadv0: Interface activated: batadv_slave_1 Bluetooth: hci7 command 0x041b tx timeout Bluetooth: hci7 command 0x040f tx timeout Bluetooth: hci7 command 0x0419 tx timeout Bluetooth: hci2 command 0x0406 tx timeout INFO: task kworker/u4:0:5 blocked for more than 140 seconds. Not tainted 4.14.290-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D24744 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 kworker/u4:4:2914 blocked for more than 140 seconds. Not tainted 4.14.290-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D29136 2914 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.1:8040 blocked for more than 140 seconds. Not tainted 4.14.290-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24992 8040 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 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 debugfs_remove fs/debugfs/inode.c:669 [inline] debugfs_remove+0xc7/0x110 fs/debugfs/inode.c:654 bdi_debug_unregister mm/backing-dev.c:126 [inline] bdi_unregister+0x3da/0x610 mm/backing-dev.c:953 release_bdi mm/backing-dev.c:970 [inline] kref_put include/linux/kref.h:70 [inline] bdi_put+0x127/0x160 mm/backing-dev.c:979 generic_shutdown_super+0x2aa/0x370 fs/super.c:460 kill_anon_super+0x36/0x90 fs/super.c:1006 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: 0033:0x7fe343bf86e7 RSP: 002b:00007fff1ceca1d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe343bf86e7 RDX: 00007fff1ceca2a9 RSI: 000000000000000a RDI: 00007fff1ceca2a0 RBP: 00007fff1ceca2a0 R08: 00000000ffffffff R09: 00007fff1ceca070 R10: 0000555556dbe903 R11: 0000000000000246 R12: 00007fe343c502ce R13: 00007fff1cecb360 R14: 0000555556dbe810 R15: 00007fff1cecb3a0 INFO: task syz-executor.5:8041 blocked for more than 140 seconds. Not tainted 4.14.290-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D25784 8041 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 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 debugfs_remove fs/debugfs/inode.c:669 [inline] debugfs_remove+0xc7/0x110 fs/debugfs/inode.c:654 bdi_debug_unregister mm/backing-dev.c:126 [inline] bdi_unregister+0x3da/0x610 mm/backing-dev.c:953 release_bdi mm/backing-dev.c:970 [inline] kref_put include/linux/kref.h:70 [inline] bdi_put+0x127/0x160 mm/backing-dev.c:979 generic_shutdown_super+0x2aa/0x370 fs/super.c:460 kill_anon_super+0x36/0x90 fs/super.c:1006 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: 0033:0x7fd10563c6e7 RSP: 002b:00007ffe54f56968 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd10563c6e7 RDX: 00007ffe54f56a39 RSI: 000000000000000a RDI: 00007ffe54f56a30 RBP: 00007ffe54f56a30 R08: 00000000ffffffff R09: 00007ffe54f56800 R10: 0000555555a63903 R11: 0000000000000246 R12: 00007fd1056942ce R13: 00007ffe54f57af0 R14: 0000555555a63810 R15: 00007ffe54f57b30 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 2 locks held by kworker/u4:4/2914: #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 2 locks held by systemd-udevd/4627: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 1 lock held by syz-executor.2/8037: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 3 locks held by syz-executor.0/9612: #0: (&sig->cred_guard_mutex){+.+.}, at: [] SYSC_perf_event_open kernel/events/core.c:10126 [inline] #0: (&sig->cred_guard_mutex){+.+.}, at: [] SyS_perf_event_open+0x131a/0x2530 kernel/events/core.c:10032 #1: (perf_sched_mutex){+.+.}, at: [] account_event kernel/events/core.c:9512 [inline] #1: (perf_sched_mutex){+.+.}, at: [] perf_event_alloc.part.0+0x1c94/0x2640 kernel/events/core.c:9704 #2: (rcu_sched_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #2: (rcu_sched_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x2c2/0x770 kernel/rcu/tree_exp.h:596 2 locks held by syz-executor.3/9615: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 1 lock held by syz-executor.4/9619: #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 drivers/block/loop.c:1993 2 locks held by systemd-udevd/9618: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 1 lock held by syz-executor.3/9631: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.290-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: 23 Comm: kworker/u4:1 Not tainted 4.14.290-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet task: ffff8880b5600600 task.stack: ffff8880b5608000 RIP: 0010:batadv_iv_ogm_schedule_buff+0xa54/0xf80 net/batman-adv/bat_iv_ogm.c:1017 RSP: 0018:ffff8880b560fc50 EFLAGS: 00000246 RAX: ffffed1015555d2f RBX: ffff8880a319b200 RCX: 1ffffffff1198fad RDX: 0000000000000000 RSI: ffffffff87cd0400 RDI: ffff8880a319b278 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000020011 R10: ffff8880b5600f00 R11: ffff8880b5600600 R12: 0000000000000000 R13: ffff8880aaaae900 R14: ffff8880aaaae900 R15: ffffed1015555d2f FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5ac1faa018 CR3: 00000000b2e61000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1043 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1036 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x5a7/0x6f0 net/batman-adv/bat_iv_ogm.c:1861 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: 71 9d 8c 0f 84 bf 01 00 00 e8 89 5e 6d fa 48 8d 7b 78 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 03 05 00 00 48 8b 04 24 4c 8b 63 78 <80> 38 00 0f 85 fc 04 00 00 4d 3b 65 78 75 a9 e8 58 5e 6d fa 4c