INFO: task syz-executor.1:3770 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28816 pid: 3770 ppid: 357 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x889/0x1f70 kernel/sched/core.c:4527 schedule+0xcd/0x2b0 kernel/sched/core.c:4602 wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590 filp_close+0xb4/0x170 fs/open.c:1276 __close_fd+0x2f/0x50 fs/file.c:671 __do_sys_close fs/open.c:1295 [inline] __se_sys_close fs/open.c:1293 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1293 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416f01 Code: Bad RIP value. RSP: 002b:00007fffd997c050 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000416f01 RDX: 0000000000000000 RSI: 00000000000006fb RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000a695e6fb R09: 00000000a695e6ff R10: 00007fffd997c140 R11: 0000000000000293 R12: 000000000118d940 R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118cfec INFO: task syz-executor.5:3778 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28816 pid: 3778 ppid: 352 flags:0x80004006 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x889/0x1f70 kernel/sched/core.c:4527 schedule+0xcd/0x2b0 kernel/sched/core.c:4602 wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590 filp_close+0xb4/0x170 fs/open.c:1276 close_files fs/file.c:401 [inline] put_files_struct fs/file.c:429 [inline] put_files_struct+0x1d0/0x350 fs/file.c:426 exit_files+0x7e/0xa0 fs/file.c:458 do_exit+0xb75/0x2890 kernel/exit.c:801 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x42d/0x1f10 kernel/signal.c:2757 arch_do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:135 [inline] exit_to_user_mode_prepare+0xf9/0x150 kernel/entry/common.c:166 syscall_exit_to_user_mode+0x36/0x260 kernel/entry/common.c:241 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ba81 Code: Bad RIP value. RSP: 002b:00007ffc57346d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000023 RAX: fffffffffffffdfc RBX: 00000000001c911c RCX: 000000000045ba81 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffc57346d60 RBP: 0000000000000001 R08: 00000000a695e6fb R09: 00000000a695e6ff R10: 00007ffc57346e60 R11: 0000000000000293 R12: 000000000118cf40 R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118d08c INFO: task syz-executor.0:3824 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28816 pid: 3824 ppid: 350 flags:0x80004006 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x889/0x1f70 kernel/sched/core.c:4527 schedule+0xcd/0x2b0 kernel/sched/core.c:4602 wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590 filp_close+0xb4/0x170 fs/open.c:1276 close_files fs/file.c:401 [inline] put_files_struct fs/file.c:429 [inline] put_files_struct+0x1d0/0x350 fs/file.c:426 exit_files+0x7e/0xa0 fs/file.c:458 do_exit+0xb75/0x2890 kernel/exit.c:801 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x42d/0x1f10 kernel/signal.c:2757 arch_do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:135 [inline] exit_to_user_mode_prepare+0xf9/0x150 kernel/entry/common.c:166 syscall_exit_to_user_mode+0x36/0x260 kernel/entry/common.c:241 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007ffc97048cd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffdfc RBX: 0000000000000be5 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf4c RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc97048dc0 R11: 0000000000000246 R12: 00000000000003e8 R13: 00000000001ca5ae R14: 00000000001c99c9 R15: 000000000118cf4c Showing all locks held in the system: 5 locks held by kworker/1:1/22: 1 lock held by khungtaskd/23: #0: ffffffff87313620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5825 1 lock held by systemd-journal/119: #0: ffff8881db232ad8 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x795/0xec0 kernel/sched/fair.c:10555 2 locks held by in:imklog/228: #0: ffff8881d2695c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 #1: ffffffff873a3a40 (fs_reclaim){+.+.}-{0:0}, at: syslog_print kernel/printk/printk.c:1400 [inline] #1: ffffffff873a3a40 (fs_reclaim){+.+.}-{0:0}, at: do_syslog.part.0+0x4a0/0x1340 kernel/printk/printk.c:1565 2 locks held by agetty/239: #0: ffff8881cfce4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000a022e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 2 locks held by agetty/4133: #0: ffff8881a9a34098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc9000e67b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 5 locks held by kworker/0:2/10562: #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x82b/0x15f0 kernel/workqueue.c:2240 #1: ffff8881d25efda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x85f/0x15f0 kernel/workqueue.c:2244 #2: ffff8881d44ca218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #2: ffff8881d44ca218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x4390 drivers/usb/core/hub.c:5522 #3: ffff8881cab15218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #3: ffff8881cab15218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:887 #4: ffff8881c9b721a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #4: ffff8881c9b721a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:887 5 locks held by kworker/0:3/21643: #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881da305d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x82b/0x15f0 kernel/workqueue.c:2240 #1: ffff8881a6577da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x85f/0x15f0 kernel/workqueue.c:2244 #2: ffff8881d44da218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #2: ffff8881d44da218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x4390 drivers/usb/core/hub.c:5522 #3: ffff8881cd9ff218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #3: ffff8881cd9ff218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:887 #4: ffff8881d479c1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:784 [inline] #4: ffff8881d479c1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:887 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf6/0x16e lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x74/0xb6 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1da/0x1f4 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd6a/0xfd0 kernel/hung_task.c:295 kthread+0x392/0x470 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 119 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vfs_poll include/linux/poll.h:88 [inline] RIP: 0010:ep_item_poll+0x133/0x3e0 fs/eventpoll.c:887 Code: 00 00 e8 f0 56 c0 ff 49 8d 7f 48 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 46 02 00 00 4d 8b 7f 48 <4d> 85 ff 0f 84 e3 01 00 00 e8 bf 56 c0 ff 4c 89 e7 48 89 ee 41 ff RSP: 0018:ffff8881d1e3fb08 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8881d3eef3c0 RCX: ffff8881d3eef3e0 RDX: 1ffffffff0c0f97d RSI: ffffffff817fa9d0 RDI: ffffffff8607cbe8 RBP: ffff8881d1e3fc38 R08: ffff8881d3eef3f0 R09: ffffffff895c664f R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d1f0d680 R13: 1ffff1103a3c7f63 R14: ffff8881d3eef430 R15: ffffffff81298300 FS: 00007ffadb3898c0(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffad5814000 CR3: 00000001d1cef000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ep_send_events_proc+0x272/0xc50 fs/eventpoll.c:1744 ep_scan_ready_list+0x256/0x7b0 fs/eventpoll.c:714 ep_send_events fs/eventpoll.c:1788 [inline] ep_poll fs/eventpoll.c:1944 [inline] do_epoll_wait+0xb48/0x10b0 fs/eventpoll.c:2333 __do_sys_epoll_wait fs/eventpoll.c:2343 [inline] __se_sys_epoll_wait fs/eventpoll.c:2340 [inline] __x64_sys_epoll_wait+0x93/0xf0 fs/eventpoll.c:2340 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7ffada653303 Code: 49 89 ca b8 e8 00 00 00 0f 05 48 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 49 89 ca b8 e8 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 51 c2 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffe1b487760 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 000055a82cb021e0 RCX: 00007ffada653303 RDX: 0000000000000014 RSI: 00007ffe1b487770 RDI: 0000000000000008 RBP: 00007ffe1b487960 R08: 000055a82cb0cb80 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000293 R12: 00007ffe1b487770 R13: 0000000000000001 R14: ffffffffffffffff R15: 0005ae06b9669248