INFO: task jbd2/sda1-8:4958 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:jbd2/sda1-8 state:D stack:25640 pid:4958 tgid:4958 ppid:2 task_flags:0x240040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1821/0x5740 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 io_schedule+0x7f/0xd0 kernel/sched/core.c:8110 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250 __wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_buffer include/linux/buffer_head.h:420 [inline] journal_wait_on_commit_record fs/jbd2/commit.c:171 [inline] jbd2_journal_commit_transaction+0x35cc/0x5b00 fs/jbd2/commit.c:910 kjournald2+0x3e0/0x760 fs/jbd2/journal.c:201 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 2 locks held by kworker/1:0H/25: 1 lock held by khungtaskd/31: #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 1 lock held by kworker/R-kbloc/39: 6 locks held by kworker/u8:3/48: #0: ffff88801be8e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff88801be8e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397 #1: ffffc90000b87c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline] #1: ffffc90000b87c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397 #2: ffffffff8fdc1568 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800 net/core/net_namespace.c:673 #3: ffff8880216cd128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #3: ffff8880216cd128 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline] #3: ffff8880216cd128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x129/0x420 net/devlink/core.c:555 #4: ffff88802e2a7258 (&devlink->lock_key#8){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:292 [inline] #4: ffff88802e2a7258 (&devlink->lock_key#8){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline] #4: ffff88802e2a7258 (&devlink->lock_key#8){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x142/0x420 net/devlink/core.c:555 #5: ffffffff8fdd0240 (rtnl_mutex){+.+.}-{4:4}, at: unregister_nexthop_notifier+0x17/0x40 net/ipv4/nexthop.c:4021 4 locks held by kworker/u8:4/57: #0: ffff88801ae84140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff88801ae84140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397 #1: ffffc900015e7c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline] #1: ffffc900015e7c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397 #2: ffff8880b8626118 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1004 [inline] #2: ffff8880b8626118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30 kernel/time/timer.c:1085 #3: ffffffff9a70aa28 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x83/0x580 lib/debugobjects.c:835 2 locks held by getty/5383: #0: ffff8880378360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:4/5719: 2 locks held by kworker/1:6/5733: 7 locks held by kworker/1:8/5754: 1 lock held by udevd/6009: #0: ffff888027743350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30 block/bdev.c:953 1 lock held by kworker/R-bond0/11368: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11378: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11379: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11380: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11382: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11386: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11387: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11389: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11390: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11394: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11395: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11397: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11398: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11401: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11403: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11404: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11405: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11406: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11407: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11408: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 5 locks held by syz-executor/11522: #0: ffff8880369ac410 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline] #0: ffff8880369ac410 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90 fs/read_write.c:684 #1: ffff8880ac6bb480 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540 fs/kernfs/file.c:343 #2: ffff8880299573c8 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline] #2: ffff8880299573c8 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540 fs/kernfs/file.c:344 #3: ffffffff8f64f6e0 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370 drivers/net/netdevsim/bus.c:234 #4: ffff8880216cd128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #4: ffff8880216cd128 (&dev->mutex){....}-{4:4}, at: device_del+0xa9/0x8f0 drivers/base/core.c:3857 1 lock held by syz-executor/11534: #0: ffffffff8e9630a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffffffff8e9630a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961 1 lock held by syz-executor/11546: #0: ffffffff8e9630a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline] #0: ffffffff8e9630a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961 1 lock held by kworker/R-bond0/11577: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11580: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11581: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11582: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11584: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11588: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11589: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11591: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11592: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11596: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11597: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11598: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11600: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-bond0/11602: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11604: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11606: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11607: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11608: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11609: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 1 lock held by kworker/R-wg-cr/11610: #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline] #0: ffffffff8e7fb000 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd3/0x1030 kernel/hung_task.c:561 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5754 Comm: kworker/1:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: wg-kex-wg1 wg_packet_handshake_receive_worker RIP: 0010:netlink_has_listeners+0x17c/0x3f0 net/netlink/af_netlink.c:1371 Code: 2f 84 c0 0f 85 27 02 00 00 41 0f b7 45 00 48 69 c0 c0 01 00 00 49 01 c4 49 81 c4 80 01 00 00 4c 89 e0 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 e7 e8 0a 59 72 f8 4d 8b 34 24 e8 91 31 ea 01 89 c5 31 RSP: 0018:ffffc90000a08578 EFLAGS: 00000246 RAX: 1ffff110281592d0 RBX: ffffffff89bea7e7 RCX: ffff88807d9f8000 RDX: 0000000000000100 RSI: ffffffff8c28af40 RDI: ffffffff8c28af00 RBP: dffffc0000000000 R08: ffffffff89bea7e7 R09: ffffffff8e95cda0 R10: dffffc0000000000 R11: ffffed10055f96b0 R12: ffff888140ac9680 R13: ffff88802afcb3ac R14: 1ffff920001410cc R15: 1ffff110055f9675 FS: 0000000000000000(0000) GS:ffff88812538a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000740 CR3: 000000000e74a000 CR4: 00000000003526f0 Call Trace: nft_trace_notify+0xe4/0xf60 net/netfilter/nf_tables_trace.c:248 nft_trace_packet net/netfilter/nf_tables_core.c:63 [inline] nft_do_chain+0x14e2/0x1ae0 net/netfilter/nf_tables_core.c:297 nft_do_chain_ipv4+0x195/0x290 net/netfilter/nft_chain_filter.c:24 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:316 __netif_receive_skb_one_core net/core/dev.c:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0xaa3/0x1950 net/core/dev.c:6666 __napi_poll+0xae/0x340 net/core/dev.c:7733 napi_poll net/core/dev.c:7796 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7953 handle_softirqs+0x22a/0x840 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 blake2s_compress+0xf9/0x1eb0 lib/crypto/x86/blake2s.h:42 blake2s_update+0x14b/0x450 lib/crypto/blake2s.c:119 hmac+0x1fc/0x3b0 drivers/net/wireguard/noise.c:324 kdf+0x1a3/0x2b0 drivers/net/wireguard/noise.c:375 mix_psk drivers/net/wireguard/noise.c:448 [inline] wg_noise_handshake_create_response+0x553/0x9e0 drivers/net/wireguard/noise.c:707 wg_packet_send_handshake_response+0x115/0x310 drivers/net/wireguard/send.c:94 wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline] wg_packet_handshake_receive_worker+0x6a9/0x10c0 drivers/net/wireguard/receive.c:213 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 84 c0 test %al,%al 2: 0f 85 27 02 00 00 jne 0x22f 8: 41 0f b7 45 00 movzwl 0x0(%r13),%eax d: 48 69 c0 c0 01 00 00 imul $0x1c0,%rax,%rax 14: 49 01 c4 add %rax,%r12 17: 49 81 c4 80 01 00 00 add $0x180,%r12 1e: 4c 89 e0 mov %r12,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) * 29: 74 08 je 0x33 <-- trapping instruction 2b: 4c 89 e7 mov %r12,%rdi 2e: e8 0a 59 72 f8 call 0xf872593d 33: 4d 8b 34 24 mov (%r12),%r14 37: e8 91 31 ea 01 call 0x1ea31cd 3c: 89 c5 mov %eax,%ebp 3e: 31 .byte 0x31