INFO: task kworker/0:2:927 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:24992 pid:927 tgid:927 ppid:2 flags:0x00004000 Workqueue: events rfkill_sync_work Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 device_lock include/linux/device.h:990 [inline] nfc_dev_down+0x2d/0x2e0 net/nfc/core.c:143 nfc_rfkill_set_block+0x39/0xe0 net/nfc/core.c:179 rfkill_set_block+0x203/0x560 net/rfkill/core.c:346 rfkill_sync+0x10a/0x1c0 net/rfkill/core.c:379 rfkill_sync_work+0x27/0x40 net/rfkill/core.c:1060 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 INFO: task syz-executor.4:5507 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24112 pid:5507 tgid:5507 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 hci_unregister_dev+0x2fb/0x600 net/bluetooth/hci_core.c:2790 vhci_release+0x7f/0x100 drivers/bluetooth/hci_vhci.c:674 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2be0 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7feadd47dda9 RSP: 002b:00007ffc3fde92e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feadd47dda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043 RBP: 00007feadd4db310 R08: 00007ffc3fde7087 R09: 000000000002196c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000002196c R14: 0000000000000000 R15: 0000000000000002 INFO: task syz-executor.2:6514 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:25776 pid:6514 tgid:6510 ppid:5086 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2548 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116 __flush_work+0x5c4/0xb10 kernel/workqueue.c:4205 __cancel_work_sync+0x401/0x5a0 kernel/workqueue.c:4304 rfkill_unregister+0x95/0x2c0 net/rfkill/core.c:1143 nfc_unregister_device+0x94/0x330 net/nfc/core.c:1167 virtual_ncidev_close+0x51/0xb0 drivers/nfc/virtual_ncidev.c:168 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2be0 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 get_signal+0x2390/0x2760 kernel/signal.c:2907 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:212 do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fea5727dda9 RSP: 002b:00007fea57f630c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000003 RBX: 00007fea573abf80 RCX: 00007fea5727dda9 RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007fea572ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fea573abf80 R15: 00007ffd07160f78 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:3/50: #0: ffff8880b953e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559 #1: ffff8880b9528a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988 #2: ffff8880b952a858 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x220 kernel/time/timer.c:1051 4 locks held by kworker/0:2/927: #0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc900043afd80 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x1b/0x40 net/rfkill/core.c:1059 #3: ffff888060568100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #3: ffff888060568100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down+0x2d/0x2e0 net/nfc/core.c:143 4 locks held by kworker/u8:7/1093: #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc90004a6fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:591 #3: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 2 locks held by getty/4815: #0: ffff88802a8fb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.2/5086: #0: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 1 lock held by syz-executor.4/5507: #0: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 1 lock held by syz-executor.2/6514: #0: ffff888060568100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888060568100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x60/0x330 net/nfc/core.c:1165 2 locks held by syz-executor.1/6614: #0: ffff888023626918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff888023626918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff888023626918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.0/6616: #0: ffff888023620918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff888023620918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff888023620918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.3/6618: #0: ffff88802c443118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88802c443118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88802c443118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.4/6642: #0: ffff88805edff918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88805edff918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88805edff918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.2/6645: #0: ffff88805ea1c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88805ea1c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88805ea1c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.3/6649: #0: ffff88805edfb118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88805edfb118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88805edfb118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.1/6651: #0: ffff88805e76b118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88805e76b118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88805e76b118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.0/6652: #0: ffff88805e76c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88805e76c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88805e76c918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.4/6654: #0: ffff88807e0f8918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88807e0f8918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88807e0f8918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.2/6657: #0: ffff88807ed17118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88807ed17118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88807ed17118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.3/6665: #0: ffff88802de9f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88802de9f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88802de9f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.1/6667: #0: ffff88802506f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff88802506f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff88802506f918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz-executor.0/6668: #0: ffff8880192a2918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline] #0: ffff8880192a2918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] #0: ffff8880192a2918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_write+0x2bb/0x470 drivers/bluetooth/hci_vhci.c:617 #1: ffffffff8f775ea8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/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+0xf86/0x1210 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5134 Comm: kworker/1:5 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events nsim_dev_trap_report_work RIP: 0010:unwind_next_frame+0x5cc/0x23a0 arch/x86/kernel/unwind_orc.c:505 Code: 85 c0 49 89 c4 0f 84 99 fd ff ff e8 2e 5c 50 00 4d 8d 6c 24 05 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 <4c> 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 71 18 00 00 45 0f b6 74 RSP: 0018:ffffc9000389f260 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc9000389f2e0 RCX: ffffffff813c8bf4 RDX: 1ffffffff206f1d0 RSI: ffffffff813c9c82 RDI: 0000000000000006 RBP: 0000000000000001 R08: 0000000000000006 R09: ffffffff81dccc7b R10: ffffffff81dccbc4 R11: dffffc0000000000 R12: ffffffff90378e7c R13: ffffffff90378e81 R14: 000000000003040e R15: ffffc9000389f315 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005630323045f0 CR3: 000000002c34a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 save_stack+0x162/0x1f0 mm/page_owner.c:129 __set_page_owner+0x1f/0x60 mm/page_owner.c:195 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22b/0x2410 mm/page_alloc.c:4569 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc_node_track_caller+0x367/0x470 mm/slub.c:3986 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:599 __alloc_skb+0x164/0x380 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1318 [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+0x2a4/0xc80 drivers/net/netdevsim/dev.c:850 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243