watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.2.136:987]
Modules linked in:
CPU: 0 PID: 987 Comm: syz.2.136 Not tainted 6.1.90-syzkaller-00002-g7003f6b36a9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:update_stack_state+0x93/0x460 arch/x86/kernel/unwind_frame.c:208
Code: 48 85 c0 74 08 48 05 a8 00 00 00 eb 21 49 8d 5f 38 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 60 e8 84 00 48 8b 03 <48> 83 c0 10 48 89 45 98 48 8b 45 c0 89 c2 83 e2 01 48 f7 da 48 89
RSP: 0018:ffffc900000071f0 EFLAGS: 00000246
RAX: ffffc90000007a10 RBX: ffffc90000007378 RCX: ffffffff877a1000
RDX: dffffc0000000000 RSI: ffffc90000007bf8 RDI: ffffc90000007398
RBP: ffffc900000072a8 R08: ffffc90000007428 R09: 0000000000000005
R10: ffffc90000007430 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffc90000007390 R14: dffffc0000000000 R15: ffffc90000007340
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30015ff8 CR3: 0000000006e0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x3cb/0x700 arch/x86/kernel/unwind_frame.c:315
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 ref_tracker_alloc+0x175/0x450 lib/ref_tracker.c:91
 __netdev_tracker_alloc include/linux/netdevice.h:4063 [inline]
 netdev_hold include/linux/netdevice.h:4092 [inline]
 ___neigh_create+0xb6e/0x1db0 net/core/neighbour.c:657
 __neigh_create+0x32/0x40 net/core/neighbour.c:737
 ip6_finish_output2+0x9d0/0x1840 net/ipv6/ip6_output.c:125
 __ip6_finish_output net/ipv6/ip6_output.c:201 [inline]
 ip6_finish_output+0x50f/0xa60 net/ipv6/ip6_output.c:212
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4d0 net/ipv6/ip6_output.c:233
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x7cf/0xdc0 net/ipv6/ndisc.c:509
 ndisc_send_rs+0x47d/0x5f0 net/ipv6/ndisc.c:719
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3984
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1510
 expire_timers kernel/time/timer.c:1555 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1826
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1839
 __do_softirq+0x1d8/0x661 kernel/softirq.c:617
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x50/0xf0 kernel/softirq.c:700
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:712
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__schedule+0xcaf/0x1550
Code: 44 24 68 42 0f b6 04 28 84 c0 0f 85 83 02 00 00 41 80 24 24 fc 4c 89 f7 48 8b 74 24 20 e8 a9 c4 e2 fb 48 89 c7 e8 81 d7 32 fc <48> 8b 44 24 70 48 c7 84 24 80 00 00 00 0e 36 e0 45 49 c7 44 05 00
RSP: 0018:ffffc900012070e0 EFLAGS: 00000282
RAX: 0000000080000001 RBX: 1ffff1103ee070fc RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc900012071f0 R08: dffffc0000000000 R09: ffffed1022694ca9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881134a6540
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881f70387e0
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:7056
 raw_irqentry_exit_cond_resched+0x2a/0x30 kernel/entry/common.c:396
 irqentry_exit+0x30/0x40 kernel/entry/common.c:439
 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__stack_depot_save+0x1/0x480 lib/stackdepot.c:423
Code: df 48 83 c7 18 31 d2 e8 2d fd c4 fe 5b 41 5e 5d c3 48 c7 c7 90 2c 1d 87 4c 89 f6 e8 39 49 00 00 eb be 0f 1f 80 00 00 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 38 45 89 c5 41 89 ce
RSP: 0018:ffffc90001207380 EFLAGS: 00000246
RAX: 0000000000000010 RBX: ffff8881134a6ae8 RCX: 0000000000002800
RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffffc900012073e0
RBP: ffffc90001207390 R08: 0000000000000001 R09: 000000000000000f
R10: ffffc90001207310 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000240e78 R14: ffffc900012073e0 R15: 1ffff11022694d5d
 save_stack+0x104/0x1e0 mm/page_owner.c:148
 __reset_page_owner+0x54/0x190 mm/page_owner.c:168
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3594
 free_the_page mm/page_alloc.c:798 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5803
 __vunmap+0x9f3/0xb60 mm/vmalloc.c:2728
 __vfree mm/vmalloc.c:2776 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2807
 kcov_put kernel/kcov.c:428 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:524
 __fput+0x3ab/0x870 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x24d/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xbd5/0x2b80 kernel/exit.c:875
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025
 get_signal+0x169d/0x1820 kernel/signal.c:2880
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe1b7d779f9
Code: Unable to access opcode bytes at 0x7fe1b7d779cf.
RSP: 002b:00007fe1b8b200e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fe1b7f05f88 RCX: 00007fe1b7d779f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe1b7f05f88
RBP: 00007fe1b7f05f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe1b7f05f8c
R13: 0000000000000000 R14: 00007fff00dbc950 R15: 00007fff00dbca38
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 372 Comm: kworker/u4:4 Not tainted 6.1.90-syzkaller-00002-g7003f6b36a9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x60 kernel/kcov.c:225
Code: 0b 00 00 83 fa 02 75 21 48 8b 91 50 0b 00 00 48 8b 32 48 8d 7e 01 8b 89 4c 0b 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 5d <c3> 66 90 55 48 89 e5 4c 8b 45 08 65 48 8b 15 a0 ca 8c 7e 65 8b 05
RSP: 0018:ffffc9000b5af838 EFLAGS: 00000293
RAX: ffffffff816c074c RBX: 1ffff1103ee07a99 RCX: ffff8881115c9440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b5af958 R08: ffffffff816c0715 R09: ffffed103ee271fb
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000800000000 R14: ffff8881f703d4c8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb40b06018 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
 text_poke_bp_batch+0x1e9/0x730 arch/x86/kernel/alternative.c:1534
 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1732
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:455
 jump_label_update+0x3af/0x450 kernel/jump_label.c:801
 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/0x450 mm/kfence/core.c:804
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>