INFO: task kworker/1:13:15169 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-00055-g1c8b86a3799f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:13 state:D stack:23056 pid:15169 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143 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:3624 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:3624 usb_new_device+0xd80/0x1960 drivers/usb/core/hub.c:2589 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+0x2daf/0x4e00 drivers/usb/core/hub.c:5822 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 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:304 INFO: task syz-executor.1:17018 blocked for more than 143 seconds. Not tainted 6.6.0-rc5-syzkaller-00055-g1c8b86a3799f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28368 pid:17018 ppid:5095 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 device_lock include/linux/device.h:992 [inline] usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 chrdev_open+0x277/0x700 fs/char_dev.c:414 do_dentry_open+0x88b/0x1730 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x19af/0x29c0 fs/namei.c:3796 do_filp_open+0x1de/0x430 fs/namei.c:3823 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f80fdc7b6e0 RSP: 002b:00007f80fe9e2c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f80fdc7b6e0 RDX: 0000000000000002 RSI: 00007f80fe9e2ca0 RDI: 00000000ffffff9c RBP: 00007f80fe9e2ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000000000b R14: 00007f80fdd9bf80 R15: 00007f80fdebfa48 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by kworker/u4:2/42: 2 locks held by getty/4799: #0: ffff88802a61a0a0 (&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+0xfc5/0x1480 drivers/tty/n_tty.c:2206 6 locks held by kworker/1:13/15169: #0: ffff888145e74d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90013fefd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e00 drivers/usb/core/hub.c:5768 #3: ffff88807eccd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #3: ffff88807eccd190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005 #4: ffff888062c07160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #4: ffff888062c07160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005 #5: ffff88805f422438 (&priv->cmd_lock){+.+.}-{3:3}, at: __pn533_send_async+0x155/0x590 drivers/nfc/pn533/pn533.c:458 4 locks held by udevd/16682: #0: ffff88801ed7c540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182 #1: ffff888025ba1c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154 #2: ffff8880289ed490 (kn->active#22){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155 #3: ffff88807eccd190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline] #3: ffff88807eccd190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142 1 lock held by syz-executor.1/17018: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.3/17068: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.4/17075: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.4/17076: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.1/17094: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.5/17113: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.1/17154: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.4/17157: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.4/17158: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.4/17159: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.3/17162: #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #0: ffff88801fef4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x1b5/0x900 drivers/usb/core/devio.c:1051 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc5-syzkaller-00055-g1c8b86a3799f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 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+0x33c/0x440 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:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5142 Comm: kworker/0:5 Not tainted 6.6.0-rc5-syzkaller-00055-g1c8b86a3799f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events nsim_dev_trap_report_work RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 Code: 26 8a 9d 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 8b 05 0d f6 7b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0018:ffffc900049e76f0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffc900049e7778 RCX: 0000000000000000 RDX: ffff888017bfbb80 RSI: ffffffff813a5834 RDI: ffffc900049e7788 RBP: ffffc900049e7b00 R08: 0000000000000004 R09: 0000000000000001 R10: 0000000000000001 R11: 699adfdb9f569876 R12: ffffc900049e0000 R13: ffffc900049e8000 R14: ffffc900049e7b08 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555e96938 CR3: 000000000c976000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_stack arch/x86/include/asm/stacktrace.h:60 [inline] unwind_next_frame+0x1212/0x2390 arch/x86/kernel/unwind_orc.c:665 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1043 kmalloc_reserve+0xef/0x260 net/core/skbuff.c:581 __alloc_skb+0x12b/0x330 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x29e/0xc70 drivers/net/netdevsim/dev.c:850 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 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:304