INFO: task kworker/1:3:5080 blocked for more than 143 seconds. Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:24928 pid:5080 tgid:5080 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0xf12/0x5c00 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6817 schedule_timeout+0x257/0x290 kernel/time/timer.c:2159 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116 pn533_usb_send_frame+0x304/0x5d0 drivers/nfc/pn533/usb.c:187 __pn533_send_async+0x209/0x590 drivers/nfc/pn533/pn533.c:462 pn533_send_cmd_async drivers/nfc/pn533/pn533.c:501 [inline] pn533_send_cmd_sync drivers/nfc/pn533/pn533.c:624 [inline] pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2523 [inline] pn533_finalize_setup+0xfe/0x6c0 drivers/nfc/pn533/pn533.c:2720 pn533_usb_probe+0xb72/0xfe0 drivers/nfc/pn533/usb.c:583 usb_probe_interface+0x307/0x930 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x117e/0x1aa0 drivers/base/core.c:3625 usb_set_configuration+0x10cb/0x1c40 drivers/usb/core/message.c:2207 usb_generic_driver_probe+0xca/0x130 drivers/usb/core/generic.c:238 usb_probe_device+0xda/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x117e/0x1aa0 drivers/base/core.c:3625 usb_new_device+0xd80/0x19f0 drivers/usb/core/hub.c:2576 hub_port_connect drivers/usb/core/hub.c:5440 [inline] hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] port_event drivers/usb/core/hub.c:5740 [inline] hub_event+0x2dac/0x4e10 drivers/usb/core/hub.c:5822 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 2 locks held by getty/4822: #0: ffff88802a3260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 6 locks held by kworker/1:3/5080: #0: ffff888019ad7138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc9000424fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 #2: ffff88802271d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff88802271d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5768 #3: ffff88802bb68190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #3: ffff88802bb68190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005 #4: ffff88802bea1160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #4: ffff88802bea1160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005 #5: ffff88802bea3438 (&priv->cmd_lock){+.+.}-{3:3}, at: __pn533_send_async+0x155/0x590 drivers/nfc/pn533/pn533.c:458 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4499 Comm: syslogd Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13 Code: 04 85 c0 74 1a 65 8b 05 73 3c 77 75 85 c0 75 0f 65 8b 05 7c 39 77 75 85 c0 74 04 90 0f 0b 90 e9 83 fc ff ff 0f 1f 00 41 54 55 <53> 48 83 ec 08 65 8b 1d 0d 6f 78 75 65 8b 05 02 6f 78 75 a9 ff ff RSP: 0018:ffffc9000312f5d8 EFLAGS: 00000046 RAX: 0000000080000000 RBX: ffffffff8a8edcc4 RCX: 0000000000000001 RDX: ffffffff8aa0008b RSI: ffffffff8accadc0 RDI: ffffffff8b2f8e40 RBP: 0000000000000286 R08: ffff88823b923b30 R09: 00000000572b0a1e R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000312f698 R13: 0000000000000010 R14: 0000000000000010 R15: 0000000000000000 FS: 00007f6238e7f380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000960004 CR3: 000000002cf74000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_hardirqs_off+0x67/0xd0 kernel/locking/lockdep.c:4444 trace_hardirqs_off+0x10/0x120 kernel/trace/trace_preemptirq.c:87 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:158 [inline] _raw_read_lock_irqsave+0x84/0x90 kernel/locking/spinlock.c:236 stack_depot_save_flags+0x179/0x730 lib/stackdepot.c:508 kasan_save_stack+0x42/0x50 mm/kasan/common.c:48 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x124/0x360 mm/slub.c:4409 skb_kfree_head net/core/skbuff.c:986 [inline] skb_free_head+0x110/0x1b0 net/core/skbuff.c:998 skb_release_data+0x5ba/0x870 net/core/skbuff.c:1028 skb_release_all net/core/skbuff.c:1094 [inline] __kfree_skb net/core/skbuff.c:1108 [inline] consume_skb net/core/skbuff.c:1324 [inline] consume_skb+0xd2/0x170 net/core/skbuff.c:1318 __unix_dgram_recvmsg+0x814/0xee0 net/unix/af_unix.c:2468 unix_dgram_recvmsg+0xc3/0xf0 net/unix/af_unix.c:2485 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0xe2/0x170 net/socket.c:1068 sock_read_iter+0x2c3/0x3c0 net/socket.c:1138 call_read_iter include/linux/fs.h:2079 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0x7c5/0x8f0 fs/read_write.c:476 ksys_read+0x1f0/0x250 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f6238fd3b6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffc79f06378 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6238fd3b6a RDX: 00000000000000ff RSI: 000056110f921950 RDI: 0000000000000000 RBP: 000056110f921910 R08: 0000000000000001 R09: 0000000000000000 R10: 00007f62391723a3 R11: 0000000000000246 R12: 000056110f9219a3 R13: 000056110f921950 R14: 0000000000000000 R15: 00007f62391b0a80