watchdog: BUG: soft lockup - CPU#0 stuck for 236s! [syz.3.266:1849] Modules linked in: CPU: 0 PID: 1849 Comm: syz.3.266 Not tainted 5.15.151-syzkaller-00059-g5356d2f17edf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:xt_write_recseq_begin include/linux/netfilter/x_tables.h:380 [inline] RIP: 0010:ip6t_do_table+0x239/0x1850 net/ipv6/netfilter/ip6_tables.c:283 Code: b9 85 e8 ea 7c 5f 00 65 8b 1d 9b 6d 9f 7b f7 d3 83 e3 01 48 c7 c7 c0 5a b9 85 e8 d2 7c 5f 00 89 5c 24 3c 65 01 1d 7f 6d 9f 7b 83 44 24 fc 00 48 8b 44 24 70 48 8d 58 18 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc900000077a0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff87299f03 RDX: 0000000000000101 RSI: ffffffff85b95ac0 RDI: ffffffff858312e0 RBP: ffffc90000007990 R08: ffffffff84640162 R09: ffffc900000078f0 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88812b7bea10 R13: dffffc0000000000 R14: 0000000000000009 R15: ffff88811fd63a80 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f674bce9608 CR3: 0000000134942000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip6table_raw_hook+0x25/0x30 net/ipv6/netfilter/ip6table_raw.c:39 nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline] nf_hook_slow+0xbe/0x200 net/netfilter/core.c:590 nf_hook include/linux/netfilter.h:260 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0xc31/0xc90 net/ipv6/ndisc.c:509 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:703 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3977 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1427 expire_timers kernel/time/timer.c:1472 [inline] __run_timers+0x72a/0xa10 kernel/time/timer.c:1743 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1756 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 invoke_softirq kernel/softirq.c:425 [inline] __irq_exit_rcu+0x50/0xf0 kernel/softirq.c:648 irq_exit_rcu+0x9/0x10 kernel/softirq.c:660 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x57/0x80 kernel/locking/spinlock.c:194 Code: 8d 86 e8 2c eb e8 fc 48 83 3d fc c4 c3 01 00 74 35 48 89 df e8 de 60 8b fc 66 90 41 f7 c6 00 02 00 00 74 01 fb bf 01 00 00 00 e4 9a 82 fc 65 8b 05 85 dd 38 7b 85 c0 74 05 5b 41 5e 5d c3 e8 RSP: 0018:ffffc90000cd73c0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffffffff869ab220 RCX: dffffc0000000000 RDX: ffffc90000117da8 RSI: 0000000000000246 RDI: 0000000000000001 RBP: ffffc90000cd73d0 R08: dffffc0000000000 R09: ffffed102004d76e R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90000117da8 R14: 0000000000000246 R15: ffffffff869ab220 swake_up_one+0x152/0x170 kernel/sched/swait.c:54 __rcu_report_exp_rnp+0x1af/0x1c0 kernel/rcu/tree_exp.h:201 rcu_report_exp_rnp kernel/rcu/tree_exp.h:223 [inline] rcu_preempt_deferred_qs_irqrestore+0x72d/0x9f0 kernel/rcu/tree_plugin.h:562 rcu_read_unlock_special+0xdb/0x4c0 kernel/rcu/tree_plugin.h:670 __rcu_read_unlock+0x7e/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:737 [inline] page_ext_put+0x1c/0x30 mm/page_ext.c:172 __reset_page_owner+0x173/0x190 mm/page_owner.c:169 reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5853 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652 __vfree mm/vmalloc.c:2700 [inline] vfree+0x7f/0xb0 mm/vmalloc.c:2731 kcov_put kernel/kcov.c:408 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:510 __fput+0x3fe/0x910 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:308 task_work_run+0x129/0x190 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xc48/0x2ca0 kernel/exit.c:878 do_group_exit+0x141/0x310 kernel/exit.c:1000 get_signal+0x7a3/0x1630 kernel/signal.c:2896 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:314 irqentry_exit+0x12/0x40 kernel/entry/common.c:405 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0033:0x7f33c1251f19 Code: Unable to access opcode bytes at RIP 0x7f33c1251eef. RSP: 002b:00007f33bfed30f8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 00007f33c13e1f68 RCX: 00007f33c1251f19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f33c13e1f6c RBP: 00007f33c13e1f60 R08: 00007fffd9cef0b0 R09: 00007f33bfed36c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f33c13e1f6c R13: 000000000000000b R14: 00007fffd9caf8d0 R15: 00007fffd9caf9b8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 519 Comm: kworker/u4:5 Not tainted 5.15.151-syzkaller-00059-g5356d2f17edf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:193 Code: 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d c4 1a 96 05 48 89 de e8 44 77 41 00 5b 5d c3 cc 55 48 89 e5 <48> 8b 45 08 65 48 8b 0d a0 2c 92 7e 65 8b 15 a1 2c 92 7e f7 c2 00 RSP: 0018:ffffc90000ab7870 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 1ffff1103ee07af1 RCX: ffff8881234b0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000ab7870 R08: ffffffff81659c0a R09: ffffed103ee271d3 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff8881f703d788 R14: ffff8881f7138e80 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffea189bea8 CR3: 000000000680f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: csd_lock_wait kernel/smp.c:440 [inline] smp_call_function_many_cond+0x85b/0x9b0 kernel/smp.c:969 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1201 [inline] text_poke_bp_batch+0x1c4/0x5d0 arch/x86/kernel/alternative.c:1392 text_poke_flush arch/x86/kernel/alternative.c:1560 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1567 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146 __jump_label_update+0x36a/0x380 kernel/jump_label.c:459 jump_label_update+0x3af/0x450 kernel/jump_label.c:830 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177 static_key_enable+0x1a/0x30 kernel/jump_label.c:190 toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:729 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298