INFO: task kworker/0:3:448 blocked for more than 122 seconds. Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:0 pid:448 tgid:448 ppid:2 flags:0x00004000 Workqueue: events _RNvXs6_NtCs43vyB533jt3_6kernel9workqueueINtNtNtB7_4sync3arc3ArcNtNtCshgDM7dBCdno_11rust_binder7process7ProcessEINtB5_15WorkItemPointerKy0_E3runB13_ Call Trace: context_switch kernel/sched/core.c:5924 [inline] __schedule+0x145b/0x1f10 kernel/sched/core.c:7750 __schedule_loop kernel/sched/core.c:7831 [inline] schedule+0xc6/0x240 kernel/sched/core.c:7846 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0x359/0x630 kernel/sched/completion.c:127 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264 __wait_rcu_gp+0x296/0x2c0 kernel/rcu/update.c:514 synchronize_rcu_normal+0x113/0x160 kernel/rcu/tree.c:4031 synchronize_rcu+0x98/0x2e0 kernel/rcu/tree.c:4109 core::ptr::drop_in_place:: usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place:: usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place::> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] , kernel::alloc::allocator::Kmalloc> as core::ops::drop::Drop>::drop rust/kernel/alloc/kbox.rs:487 [inline] core::ptr::drop_in_place::, kernel::alloc::allocator::Kmalloc>>+0x2ab/0x330 usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 core::mem::drop::, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/mem/mod.rs:935 [inline] as core::ops::drop::Drop>::drop rust/kernel/sync/arc.rs:404 [inline] core::ptr::drop_in_place::> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place::>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] >, kernel::alloc::allocator::Kmalloc> as core::ops::drop::Drop>::drop rust/kernel/alloc/kbox.rs:487 [inline] core::ptr::drop_in_place::>, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::mem::drop::>, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/mem/mod.rs:935 [inline] > as core::ops::drop::Drop>::drop rust/kernel/rbtree.rs:499 [inline] core::ptr::drop_in_place::>>+0xc5/0x190 usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 ::deferred_release drivers/android/binder/process.rs:1367 [inline] ::run+0x243e/0x2860 drivers/android/binder/process.rs:483 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400 kthread+0x2ca/0x370 kernel/kthread.c:389 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz.2.4508:13428 blocked for more than 123 seconds. Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.4508 state:D stack:0 pid:13428 tgid:13428 ppid:13247 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5924 [inline] __schedule+0x145b/0x1f10 kernel/sched/core.c:7750 __schedule_loop kernel/sched/core.c:7831 [inline] schedule+0xc6/0x240 kernel/sched/core.c:7846 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0x359/0x630 kernel/sched/completion.c:127 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264 __wait_rcu_gp+0x296/0x2c0 kernel/rcu/update.c:514 synchronize_rcu_normal+0x113/0x160 kernel/rcu/tree.c:4031 synchronize_rcu+0x98/0x2e0 kernel/rcu/tree.c:4109 rcu_sync_enter+0x1ec/0x340 kernel/rcu/sync.c:133 percpu_down_write+0x76/0x600 kernel/locking/percpu-rwsem.c:255 hci_uart_tty_close+0x108/0x230 drivers/bluetooth/hci_ldisc.c:548 tty_ldisc_close drivers/tty/tty_ldisc.c:455 [inline] tty_ldisc_kill drivers/tty/tty_ldisc.c:613 [inline] tty_ldisc_release+0x2ad/0x600 drivers/tty/tty_ldisc.c:781 tty_release_struct+0x2d/0xe0 drivers/tty/tty_io.c:1690 tty_release+0xc0a/0x1230 drivers/tty/tty_io.c:1861 __fput+0x1fb/0xa00 fs/file_table.c:431 ____fput+0x20/0x30 fs/file_table.c:459 task_work_run+0x1e0/0x250 kernel/task_work.c:240 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x9b4/0x2630 kernel/exit.c:944 do_group_exit+0x22a/0x300 kernel/exit.c:1094 get_signal+0x139d/0x14f0 kernel/signal.c:2934 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f244cdc11e5 RSP: 002b:00007f244db19f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f244cfb5fa0 RCX: 00007f244cdc11e5 RDX: 00007f244db19fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f244ce10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f244cfb5fa0 R15: 00007fffc42167a8 INFO: task kworker/0:0:14607 blocked for more than 124 seconds. Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:14607 tgid:14607 ppid:2 flags:0x00004000 Workqueue: events _RNvXs6_NtCs43vyB533jt3_6kernel9workqueueINtNtNtB7_4sync3arc3ArcNtNtCshgDM7dBCdno_11rust_binder7process7ProcessEINtB5_15WorkItemPointerKy0_E3runB13_ Call Trace: context_switch kernel/sched/core.c:5924 [inline] __schedule+0x145b/0x1f10 kernel/sched/core.c:7750 __schedule_loop kernel/sched/core.c:7831 [inline] schedule+0xc6/0x240 kernel/sched/core.c:7846 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0x359/0x630 kernel/sched/completion.c:127 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264 __wait_rcu_gp+0x296/0x2c0 kernel/rcu/update.c:514 synchronize_rcu_normal+0x113/0x160 kernel/rcu/tree.c:4031 synchronize_rcu+0x98/0x2e0 kernel/rcu/tree.c:4109 core::ptr::drop_in_place:: usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place:: usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place::> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] , kernel::alloc::allocator::Kmalloc> as core::ops::drop::Drop>::drop rust/kernel/alloc/kbox.rs:487 [inline] core::ptr::drop_in_place::, kernel::alloc::allocator::Kmalloc>>+0x2ab/0x330 usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 core::mem::drop::, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/mem/mod.rs:935 [inline] as core::ops::drop::Drop>::drop rust/kernel/sync/arc.rs:404 [inline] core::ptr::drop_in_place::> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::ptr::drop_in_place::>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] >, kernel::alloc::allocator::Kmalloc> as core::ops::drop::Drop>::drop rust/kernel/alloc/kbox.rs:487 [inline] core::ptr::drop_in_place::>, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 [inline] core::mem::drop::>, kernel::alloc::allocator::Kmalloc>> usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/mem/mod.rs:935 [inline] > as core::ops::drop::Drop>::drop rust/kernel/rbtree.rs:499 [inline] core::ptr::drop_in_place::>>+0xc5/0x190 usr/local/rustup/toolchains/1.87.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:523 ::deferred_release drivers/android/binder/process.rs:1367 [inline] ::run+0x243e/0x2860 drivers/android/binder/process.rs:483 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400 kthread+0x2ca/0x370 kernel/kthread.c:389 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz.2.4887:14615 blocked for more than 124 seconds. Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.4887 state:D stack:0 pid:14615 tgid:14615 ppid:13247 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5924 [inline] __schedule+0x145b/0x1f10 kernel/sched/core.c:7750 __schedule_loop kernel/sched/core.c:7831 [inline] schedule+0xc6/0x240 kernel/sched/core.c:7846 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0x359/0x630 kernel/sched/completion.c:127 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148 rcu_barrier+0x415/0x530 kernel/rcu/tree.c:4642 kvm_mmu_uninit_tdp_mmu+0x1df/0x210 arch/x86/kvm/mmu/tdp_mmu.c:51 kvm_mmu_uninit_vm+0x27/0x60 arch/x86/kvm/mmu/mmu.c:6572 kvm_arch_destroy_vm+0x383/0x410 arch/x86/kvm/x86.c:12898 kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline] kvm_put_kvm+0xb04/0x12b0 virt/kvm/kvm_main.c:1391 kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414 __fput+0x1fb/0xa00 fs/file_table.c:431 ____fput+0x20/0x30 fs/file_table.c:459 task_work_run+0x1e0/0x250 kernel/task_work.c:240 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f244cd8e929 RSP: 002b:00007fffc4216908 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f244cfb7ba0 RCX: 00007f244cd8e929 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f244cfb7ba0 R08: 0000000000000210 R09: 0000001ec4216bff R10: 00007f244cfb7ac0 R11: 0000000000000246 R12: 000000000006d041 R13: 00007f244cfb5fa0 R14: ffffffffffffffff R15: 00007fffc4216a20 INFO: task syz.9.4891:14625 blocked for more than 126 seconds. Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.4891 state:D stack:0 pid:14625 tgid:14618 ppid:11080 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5924 [inline] __schedule+0x145b/0x1f10 kernel/sched/core.c:7750 __schedule_loop kernel/sched/core.c:7831 [inline] schedule+0xc6/0x240 kernel/sched/core.c:7846 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common+0x359/0x630 kernel/sched/completion.c:127 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264 __wait_rcu_gp+0x296/0x2c0 kernel/rcu/update.c:514 synchronize_rcu_normal+0x113/0x160 kernel/rcu/tree.c:4031 synchronize_rcu+0x98/0x2e0 kernel/rcu/tree.c:4109 synchronize_net+0x38/0x40 net/core/dev.c:11366 packet_release+0x9f8/0xd50 net/packet/af_packet.c:3217 __sock_release net/socket.c:659 [inline] sock_close+0xda/0x280 net/socket.c:1427 __fput+0x1fb/0xa00 fs/file_table.c:431 ____fput+0x20/0x30 fs/file_table.c:459 task_work_run+0x1e0/0x250 kernel/task_work.c:240 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x9b4/0x2630 kernel/exit.c:944 do_group_exit+0x22a/0x300 kernel/exit.c:1094 get_signal+0x139d/0x14f0 kernel/signal.c:2934 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f46f3d8e929 RSP: 002b:00007f46f23d60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f46f3fb6168 RCX: 00007f46f3d8e929 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f46f3fb6168 RBP: 00007f46f3fb6160 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f46f3fb616c R13: 0000000000000000 R14: 00007ffefc1c5f00 R15: 00007ffefc1c5fe8 NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 c93aecf919cd453af8c9b0d1ce6d9747cbb4dbdf Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120 dump_stack+0x19/0x20 lib/dump_stack.c:129 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:229 [inline] watchdog+0xd8f/0xed0 kernel/hung_task.c:385 kthread+0x2ca/0x370 kernel/kthread.c:389 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 20 Comm: rcuop/0 Not tainted 6.12.30-syzkaller-g1d4f4d446dbd #0 c93aecf919cd453af8c9b0d1ce6d9747cbb4dbdf Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x90 kernel/kcov.c:313 Code: 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 5d c3 cc cc cc cc cc 66 90 b8 6e b2 04 de 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 48 8b 45 08 65 48 8b 14 25 40 e9 04 00 65 RSP: 0018:ffffc90000230040 EFLAGS: 00000202 RAX: ffffffff8460aba2 RBX: ffff888164c3c8c0 RCX: 0000000000000100 RDX: ffff888103660000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc90000230070 R08: ffff888164c3c9b7 R09: 1ffff1102c987936 R10: dffffc0000000000 R11: ffffed102c987937 R12: 00000000fffc0001 R13: 0000000000000001 R14: 0000000000000001 R15: ffff888125d60000 FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd7a0aecdc CR3: 000000010b77e000 CR4: 00000000003526b0 DR0: 0000800000000000 DR1: 0000000000000008 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: packet_rcv+0x180/0x1670 net/packet/af_packet.c:2276 dev_queue_xmit_nit+0xa3d/0xae0 net/core/dev.c:2418 xmit_one net/core/dev.c:3655 [inline] dev_hard_start_xmit+0x187/0x770 net/core/dev.c:3678 __dev_queue_xmit+0x19cc/0x3790 net/core/dev.c:4514 dev_queue_xmit include/linux/netdevice.h:3141 [inline] br_dev_queue_push_xmit+0x553/0x6d0 net/bridge/br_forward.c:53 NF_HOOK include/linux/netfilter.h:317 [inline] br_forward_finish net/bridge/br_forward.c:66 [inline] NF_HOOK include/linux/netfilter.h:317 [inline] __br_forward+0x25c/0x390 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver net/bridge/br_forward.c:190 [inline] br_flood+0x50e/0x730 net/bridge/br_forward.c:236 br_handle_frame_finish+0x12bb/0x1720 net/bridge/br_input.c:215 nf_hook_bridge_pre net/bridge/br_input.c:301 [inline] br_handle_frame+0x5a6/0xba0 net/bridge/br_input.c:424 __netif_receive_skb_core+0xf4b/0x3940 net/core/dev.c:5651 __netif_receive_skb_one_core net/core/dev.c:5755 [inline] __netif_receive_skb net/core/dev.c:5870 [inline] process_backlog+0x3e5/0xae0 net/core/dev.c:6202 __napi_poll+0xd3/0x610 net/core/dev.c:6853 napi_poll net/core/dev.c:6922 [inline] net_rx_action+0x584/0xce0 net/core/dev.c:7044 handle_softirqs+0x1ae/0x630 kernel/softirq.c:603 __do_softirq+0xf/0x16 kernel/softirq.c:641 do_softirq+0xa6/0x100 kernel/softirq.c:485 __local_bh_enable_ip+0x74/0x80 kernel/softirq.c:412 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_do_batch+0x5c6/0xd20 kernel/rcu/tree.c:2586 nocb_cb_wait kernel/rcu/tree_nocb.h:923 [inline] rcu_nocb_cb_kthread+0x4dc/0xac0 kernel/rcu/tree_nocb.h:957 kthread+0x2ca/0x370 kernel/kthread.c:389 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244