INFO: task kworker/0:1:9 blocked for more than 143 seconds. Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:21856 pid:9 ppid:2 flags:0x00004000 Workqueue: events console_callback Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0xaa9/0x2f10 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143 ___down_common kernel/locking/semaphore.c:225 [inline] __down_common+0x345/0x680 kernel/locking/semaphore.c:246 down+0x74/0xa0 kernel/locking/semaphore.c:63 console_lock+0x2c/0x80 kernel/printk/printk.c:2600 console_callback+0x63/0x4c0 drivers/tty/vt/vt.c:2934 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Showing all locks held in the system: 2 locks held by kworker/0:1/9: #0: ffff888100070d38 ((wq_completion)events ){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] ){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376 #1: ffffc9000009fdb0 (console_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380 1 lock held by rcu_tasks_kthre/12: #0: ffffffff87c9f270 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/13: #0: ffffffff87c9ef70 ( rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/28: #0: ffffffff87c9fe80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559 2 locks held by getty/2413: #0: ffff888114a0a098 (&tty->ldisc_sem){++++}-{0:0} , at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176 6 locks held by kworker/1:5/5314: 3 locks held by kworker/1:6/5375: 6 locks held by kworker/1:7/14926: 2 locks held by kworker/1:8/15267: 6 locks held by kworker/1:0/18294: 4 locks held by udevd/693: #0: ffff888113a1a8b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xe3/0x12d0 fs/seq_file.c:182 #1: ffff888100f8f488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x450 fs/kernfs/file.c:154 #2: ffff888112baada0 (kn->active #30){++++}-{0:0} , at: kernfs_seq_start+0x75/0x450 fs/kernfs/file.c:155 #3: ffff888112d55190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:842 [inline] (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 3 locks held by kworker/0:6/932: 6 locks held by kworker/1:2/1889: 3 locks held by syz-executor.0/3180: #0: ffff888114b00438 (sb_writers #4){.+.+}-{0:0}, at: filename_create+0xf5/0x4a0 fs/namei.c:3877 #1: ffff888121a5b588 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #1: ffff888121a5b588 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x1ae/0x4a0 fs/namei.c:3884 #2: ffff888114b04990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14e0 fs/jbd2/transaction.c:461 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x273/0x2d0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 932 Comm: kworker/0:6 Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Workqueue: events dvb_usb_read_remote_control RIP: 0010:select_task_rq kernel/sched/core.c:3578 [inline] RIP: 0010:try_to_wake_up+0x33d/0x1ad0 kernel/sched/core.c:4292 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e db 12 00 00 83 bd c8 03 00 00 01 <0f> 8e 6f 0b 00 00 48 8d bd f0 03 00 00 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90000007d50 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 1ffff92000000fb2 RCX: 0000000000000001 RDX: 1ffff11023c82419 RSI: 0000000000010003 RDI: ffff88811e4120c8 RBP: ffff88811e411d00 R08: 0000000000000000 R09: ffffffff8907fdd7 R10: fffffbfff120ffba R11: ffffc90000007ff8 R12: 0000000000000000 R13: 0000000000000006 R14: ffff88811e4126a0 R15: ffff88811e411d18 FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83e3ce7840 CR3: 0000000113ec8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:1939 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x5fa/0xbe0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8d/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1979 [inline] RIP: 0010:vprintk_emit+0x3fe/0x600 kernel/printk/printk.c:2306 Code: 62 1b 00 48 85 db 0f 85 da 01 00 00 e8 6b 66 1b 00 31 ff 4c 89 f6 e8 a1 62 1b 00 4d 85 f6 74 06 e8 57 66 1b 00 fb f3 0f 1e fa 4d 66 1b 00 45 31 c9 41 b8 01 00 00 00 31 c9 68 7a c0 2f 81 ba RSP: 0018:ffffc9000f767b88 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88810fed5700 RSI: ffffffff812fc079 RDI: 0000000000000007 RBP: ffffc9000f767bc0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000200 R11: 65725f783032396d R12: 0000000000000017 R13: ffff888106a60000 R14: 0000000000000200 R15: ffffc9000f767c10 vprintk+0x84/0xa0 kernel/printk/printk_safe.c:50 _printk+0xbf/0xf0 kernel/printk/printk.c:2328 m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline] m920x_rc_core_query+0x2e6/0x500 drivers/media/usb/dvb-usb/m920x.c:229 dvb_usb_read_remote_control+0xdf/0x1d0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308