watchdog: BUG: soft lockup - CPU#0 stuck for 121s! [syz.0.1335:7351]
Modules linked in:
CPU: 0 PID: 7351 Comm: syz.0.1335 Tainted: G        W          6.1.99-syzkaller-00049-g1fe91f863a7f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:neigh_key_eq128 include/net/neighbour.h:297 [inline]
RIP: 0010:___neigh_lookup_noref include/net/neighbour.h:318 [inline]
RIP: 0010:__ipv6_neigh_lookup_noref include/net/ndisc.h:383 [inline]
RIP: 0010:ip6_finish_output2+0x785/0x1840 net/ipv6/ip6_output.c:121
Code: 33 74 0a e8 6d ed ff fc e9 08 01 00 00 49 8d 9f 90 01 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 19 01 00 00 8b 33 <48> 8b 44 24 28 42 0f b6 04 28 84 c0 48 8b 54 24 08 0f 85 1d 01 00
RSP: 0018:ffffc90000007720 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8881290c5990 RCX: dffffc0000000000
RDX: 0000000000000101 RSI: 00000000000002ff RDI: ffff88810fcd6f80
RBP: ffffc90000007868 R08: ffffffff8475b538 R09: ffffffff8401f951
R10: 0000000000000002 R11: ffff88811610e540 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88813923a000 R15: ffff8881290c5800
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 0000000124c5d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __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+0x1f7/0x4c0 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
 handle_softirqs+0x1db/0x650 kernel/softirq.c:617
 __do_softirq kernel/softirq.c:655 [inline]
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:704
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:716
 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:finish_task_switch+0x16f/0x7b0 kernel/sched/core.c:5294
Code: 74 08 4c 89 ff e8 21 7a 6c 00 49 8b 1f 48 85 db 4c 8b 6d c0 0f 85 ce 00 00 00 4c 89 e7 e8 89 c9 cf 03 fb 49 8d 9d 48 0b 00 00 <48> 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30
RSP: 0018:ffffc9000106f1a0 EFLAGS: 00000282
RAX: 0000000080000001 RBX: ffff88811610f088 RCX: 0000000000000002
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000106f1f0 R08: ffffffff819b5700 R09: fffffbfff0f2544f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f6e37c80
R13: ffff88811610e540 R14: 1ffff1103edc70fc R15: ffff8881f6e387e0
 context_switch kernel/sched/core.c:5420 [inline]
 __schedule+0xcbd/0x1560 kernel/sched/core.c:6747
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:7059
 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:__nr_to_section include/linux/mmzone.h:1820 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1928 [inline]
RIP: 0010:lookup_page_ext mm/page_ext.c:280 [inline]
RIP: 0010:page_ext_get+0x95/0x140 mm/page_ext.c:162
Code: ba 87 e8 ce 24 f9 ff 48 8b 05 37 8c f6 05 48 85 c0 74 42 4c 89 f9 48 c1 e9 16 48 8d 1c c8 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 a1 24 f9 ff 48 8b 1b 48 85 db 74 20 4d 89 fe 49
RSP: 0018:ffffc9000106f4b0 EFLAGS: 00000246
RAX: 1ffff11047ffec00 RBX: ffff88823fff6000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000004b35c40 RDI: 000000ffffffffc0
RBP: ffffc9000106f4d0 R08: ffffffff81c3bfdb R09: ffffffff87b6b008
R10: ffffffff87b6b018 R11: ffffffff87b6b010 R12: dffffc0000000000
R13: ffffea0004b35c40 R14: 000000ffffffffc0 R15: 000000000012cd71
 __reset_page_owner+0x34/0x190 mm/page_owner.c:164
 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+0x1e5/0x870 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:877
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027
 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: 0033:0x7f9169f7dff9
Code: Unable to access opcode bytes at 0x7f9169f7dfcf.
RSP: 002b:00007f916aca5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f916a136058 RCX: 00007f9169f7dff9
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000009
RBP: 00007f9169ff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f916a136058 R15: 00007ffcbfe396d8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15 Comm: rcub/0 Tainted: G        W          6.1.99-syzkaller-00049-g1fe91f863a7f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x7d/0x80 kernel/kcov.c:313
Code: e1 05 48 8d 41 28 4c 39 c8 77 1e 49 ff c2 4c 89 12 48 c7 44 11 08 07 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 5d <c3> 66 90 55 48 89 e5 41 57 41 56 41 54 53 48 8b 46 08 48 83 c0 f8
RSP: 0018:ffffc900001b0478 EFLAGS: 00000046
RAX: 0000000080010100 RBX: ffff88812f838898 RCX: ffff8881003a0000
RDX: ffffffff87a8a601 RSI: ffffffff81461bf9 RDI: 0000000000000000
RBP: ffffc900001b05d0 R08: ffffffff81011c0e R09: ffffc900001b0500
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200003609c R14: ffffffff81461bf9 R15: ffffc900001b0500
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000007b800000000 CR3: 0000000145521000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 get_perf_callchain+0x579/0x810 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7436 [inline]
 perf_prepare_sample+0x38f/0x1ca0 kernel/events/core.c:7469
 __perf_event_output kernel/events/core.c:7654 [inline]
 perf_event_output_forward+0xdb/0x1b0 kernel/events/core.c:7674
 __perf_event_overflow+0x458/0x630 kernel/events/core.c:9422
 perf_swevent_hrtimer+0x38e/0x4f0 kernel/events/core.c:10830
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x41a/0xad0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x40c/0xaa0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xfd/0x3c0 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x44/0xc0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x14a/0x650 kernel/softirq.c:605
Code: 85 e8 fa c5 d3 03 65 66 44 89 3d 81 5e bd 7e 48 c7 c7 c0 19 89 85 e8 e5 c5 d3 03 65 89 1d 46 5c bc 7e fb 49 c7 c5 c0 a0 00 87 <89> 5d a0 b8 ff ff ff ff 0f bc 45 a0 41 89 c6 41 ff c6 0f 84 b0 02
RSP: 0018:ffffc900001b0f38 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff8881003a0000
RDX: 1ffffffff0f6d608 RSI: ffffffff858919c0 RDI: ffffffff85ea02c0
RBP: ffffc900001b0fc0 R08: ffffffff87b6b040 R09: ffffffff87b6b048
R10: ffffffff87b6b058 R11: ffffffff87b6b050 R12: ffff8881003a0000
R13: ffffffff8700a0c0 R14: 0000000000000008 R15: 0000000000000008
 __do_softirq kernel/softirq.c:655 [inline]
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:704
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:716
 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:__kasan_check_read+0x0/0x20 mm/kasan/shadow.c:30
Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 c7 4c c9 67 86 eb 0a 48 c7 c7 84 c9 67 86 4c 89 fe e8 e1 90 5b 03 31 db eb d3 cc cc <55> 48 89 e5 89 f6 48 8b 4d 08 31 d2 e8 7f eb ff ff 5d c3 66 2e 0f
RSP: 0018:ffffc900000f7be8 EFLAGS: 00000246
RAX: ffff8881f6e00000 RBX: ffff88811610e554 RCX: ffffffff851fb863
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881003a0000
RBP: ffffc900000f7c90 R08: dffffc0000000000 R09: ffffed1020074001
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881003a0000 R14: ffffffff871b5d70 R15: ffffc900000f7ce0
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1637 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1673 [inline]
 rt_mutex_slowlock+0x19c/0x480 kernel/locking/rtmutex.c:1702
 __rt_mutex_lock kernel/locking/rtmutex.c:1714 [inline]
 __rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline]
 rt_mutex_lock+0x145/0x210 kernel/locking/rtmutex_api.c:73
 rcu_boost kernel/rcu/tree_plugin.h:1099 [inline]
 rcu_boost_kthread+0x231/0x6e0 kernel/rcu/tree_plugin.h:1124
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>