watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.4.696:3743]
Modules linked in:
CPU: 0 PID: 3743 Comm: syz.4.696 Tainted: G        W         5.10.236-syzkaller-00012-gab07aeb2c93d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:update_stack_state+0x37a/0x480 arch/x86/kernel/unwind_frame.c:234
Code: 4c 89 f7 e8 a8 c8 6e 00 48 8b 45 d0 49 89 06 48 8b 45 98 42 80 3c 20 00 4c 8b 75 c8 4c 8b 6d c0 74 08 4c 89 f7 e8 86 c8 6e 00 <49> c7 06 00 00 00 00 48 83 45 d0 08 eb 10 48 8b 45 88 48 83 e8 80
RSP: 0018:ffffc90000006d58 EFLAGS: 00000246
RAX: 1ffff92000000de0 RBX: ffffc90000006ea8 RCX: ffffc90000007301
RDX: ffffc90000007370 RSI: 1ffff92000000dd6 RDI: ffffc90000006f00
RBP: ffffc90000006e18 R08: ffffc90000006f70 R09: ffffc90000006f68
R10: 0000000000000006 R11: 1ffff92000000dd5 R12: dffffc0000000000
R13: ffffc90000006ed0 R14: ffffc90000006f00 R15: 1ffff92000000ddd
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555b4134a8 CR3: 000000015a0fb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x3d5/0x700 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x108/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0x100/0x2d0 mm/slub.c:3219
 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
 __kfree_skb net/core/skbuff.c:695 [inline]
 consume_skb+0xb3/0x1f0 net/core/skbuff.c:851
 netlink_broadcast_filtered+0x119a/0x1290 net/netlink/af_netlink.c:1517
 netlink_broadcast net/netlink/af_netlink.c:1539 [inline]
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0xed/0x1b0 net/netlink/af_netlink.c:2528
 rtnl_notify+0x9a/0xc0 net/core/rtnetlink.c:737
 __neigh_notify+0xd2/0x130 net/core/neighbour.c:3390
 neigh_cleanup_and_release+0x2c/0x1a0 net/core/neighbour.c:102
 neigh_del net/core/neighbour.c:198 [inline]
 neigh_remove_one+0x341/0x3b0 net/core/neighbour.c:219
 neigh_forced_gc net/core/neighbour.c:252 [inline]
 neigh_alloc net/core/neighbour.c:430 [inline]
 ___neigh_create+0x48b/0x1a20 net/core/neighbour.c:592
 __neigh_create+0x31/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x8d1/0x1500 net/ipv6/ip6_output.c:127
 __ip6_finish_output+0x5ff/0x790 net/ipv6/ip6_output.c:201
 ip6_finish_output+0x33/0x1f0 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1d1/0x3b0 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:451 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6f5/0xb40 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x6e5/0x960 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2c7/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x639/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x49/0x70 kernel/locking/spinlock.c:199
Code: 12 48 89 fb 48 c7 c7 b0 6a 2c 86 e8 21 0a 29 fd 48 89 df 48 83 3d 76 01 b8 01 00 74 27 e8 c3 94 d6 fc 66 90 fb bf 01 00 00 00 <e8> 82 94 cf fc 65 8b 05 37 04 8e 7b 85 c0 74 03 5b 5d c3 e8 63 01
RSP: 0018:ffffc90000b07468 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000b07470 R08: dffffc0000000000 R09: fffffbfff0d4639b
R10: fffffbfff0d4639b R11: 1ffffffff0d4639a R12: ffff8881f7055fc0
R13: ffff888100293b6c R14: 0000000000000000 R15: ffff888112c78000
 finish_lock_switch kernel/sched/core.c:3786 [inline]
 finish_task_switch+0x12e/0x5a0 kernel/sched/core.c:3886
 context_switch kernel/sched/core.c:4051 [inline]
 __schedule+0xb4f/0x1310 kernel/sched/core.c:4806
 preempt_schedule_irq+0x9b/0x110 kernel/sched/core.c:5067
 irqentry_exit_cond_resched kernel/entry/common.c:365 [inline]
 irqentry_exit+0x56/0x60 kernel/entry/common.c:395
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:set_pcppage_migratetype mm/page_alloc.c:239 [inline]
RIP: 0010:free_unref_page_prepare+0x1c7/0x2d0 mm/page_alloc.c:3340
Code: 3c 20 00 74 08 4c 89 f7 e8 06 78 04 00 4d 8b 36 44 89 f9 49 d3 ee 41 83 e6 07 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 7f 78 04 00 4c 89 33 b0 01 48 83 c4 08 5b 41 5c
RSP: 0018:ffffc90000b07760 EFLAGS: 00000246
RAX: 1ffffd40008790cc RBX: ffffea00043c8660 RCX: 0000000000000030
RDX: 0000000000000200 RSI: 00000000000000ff RDI: ffffed1021e43400
RBP: ffffc90000b07790 R08: dffffc0000000000 R09: ffffed1021e43200
R10: ffffed102076ac97 R11: 1ffff1102076ac96 R12: dffffc0000000000
R13: ffffea00043c8658 R14: 0000000000000000 R15: 0000000000000030
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page mm/page_alloc.c:5408 [inline]
 __free_pages+0x14b/0x380 mm/page_alloc.c:5419
 __vunmap+0x84d/0x9d0 mm/vmalloc.c:2301
 __vfree mm/vmalloc.c:2350 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2381
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __fput+0x2fb/0x770 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa27/0x2470 kernel/exit.c:863
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0xf7d/0x12e0 kernel/signal.c:2793
 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7ffab7532033
Code: Unable to access opcode bytes at RIP 0x7ffab7532009.
RSP: 002b:00007ffab5cb9f70 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00007ffab76f5dc2 RCX: 00007ffab76db678
RDX: 000000000000fb5e RSI: 0000000000000001 RDI: 00007ffab76f5dc2
RBP: 00007ffab76db678 R08: 0000000000000000 R09: 0026e79afae9a7ff
R10: 000002982f468887 R11: 000000000003e370 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffab789a080 R15: 00007ffdfc4225e8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5519 Comm: syz.6.970 Tainted: G        W         5.10.236-syzkaller-00012-gab07aeb2c93d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x1/0x80 kernel/kcov.c:290
Code: 01 08 05 00 00 00 4a 89 7c 01 10 4a 89 74 01 18 4a 89 44 01 20 48 ff c2 48 89 11 5d c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d 80 dc 9e 7e 65 8b 15 85 dc 9e 7e
RSP: 0018:ffffc9000016fea0 EFLAGS: 00000046
RAX: 1ffff11029735720 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000010502 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000016fee0 R08: dffffc0000000000 R09: ffffed102973576a
R10: ffffed102973576a R11: 1ffff11029735769 R12: ffff88814b9aba00
R13: ffff88814b9ab800 R14: 0000000000000000 R15: ffff88814b9ab900
FS:  00007f8badc496c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f269df67f40 CR3: 0000000153f67000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __perf_event_overflow+0x9e/0x340 kernel/events/core.c:9050
 perf_swevent_hrtimer+0x3db/0x530 kernel/events/core.c:10468
 __run_hrtimer kernel/time/hrtimer.c:1587 [inline]
 __hrtimer_run_queues+0x37a/0x960 kernel/time/hrtimer.c:1651
 hrtimer_interrupt+0x3a6/0xdc0 kernel/time/hrtimer.c:1713
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xfa/0x3f0 arch/x86/kernel/apic/apic.c:1112
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0xba/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:queued_write_lock_slowpath+0x148/0x230 kernel/locking/qrwlock.c:79
Code: e8 2d 22 52 00 eb 20 f3 90 43 0f b6 04 27 84 c0 74 15 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 08 4c 89 f7 e8 0b 22 52 00 41 8b 06 <3d> 00 01 00 00 75 d6 c7 44 24 30 00 01 00 00 4c 89 f7 be 04 00 00
RSP: 0018:ffffc900001704a0 EFLAGS: 00000246
RAX: 00000000000001ff RBX: ffffffff86939c4c RCX: ffffffff814b50dd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff86939c48
RBP: ffffc90000170530 R08: dffffc0000000000 R09: fffffbfff0d2738a
R10: fffffbfff0d2738a R11: 1ffffffff0d27389 R12: dffffc0000000000
R13: 1ffff9200002e094 R14: ffffffff86939c48 R15: 1ffffffff0d27389
 queued_write_lock include/asm-generic/qrwlock.h:95 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0xd6/0xe0 kernel/locking/spinlock.c:319
 ___neigh_create+0xce4/0x1a20 net/core/neighbour.c:626
 __neigh_create+0x31/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x8d1/0x1500 net/ipv6/ip6_output.c:127
 __ip6_finish_output+0x5ff/0x790 net/ipv6/ip6_output.c:201
 ip6_finish_output+0x33/0x1f0 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1d1/0x3b0 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:451 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6f5/0xb40 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x6e5/0x960 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2c7/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x639/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__text_poke+0x5a2/0x640 arch/x86/kernel/alternative.c:1265
Code: 5c 24 50 48 89 df 4c 89 fe 48 8b 54 24 18 e8 25 b8 2f 01 85 c0 0f 85 9c 00 00 00 48 8b 44 24 30 48 89 44 24 58 ff 74 24 58 9d <48> 8b bc 24 a0 00 00 00 e8 31 b6 4c 03 48 c7 44 24 60 0e 36 e0 45
RSP: 0018:ffffc90001d4f760 EFLAGS: 00000286
RAX: 0000000000000286 RBX: ffffffff827ac9d8 RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff86c5fe2b RDI: ffffffff827ac9d8
RBP: ffffc90001d4f870 R08: 0000000000000000 R09: ffffed102000c4c4
R10: ffffed102000c4c4 R11: 1ffff1102000c4c3 R12: 00002aaaaaaac000
R13: ffff8881434ea780 R14: ffff888100065558 R15: ffffffff86c5fe2b
 text_poke arch/x86/kernel/alternative.c:1289 [inline]
 text_poke_bp_batch+0x277/0x4a0 arch/x86/kernel/alternative.c:1522
 text_poke_flush arch/x86/kernel/alternative.c:1677 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1684
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126
 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:459
 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:825
 static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:177
 static_key_enable+0x1a/0x30 kernel/jump_label.c:190
 tracepoint_add_func+0x89a/0x9f0 kernel/tracepoint.c:382
 tracepoint_probe_register_prio kernel/tracepoint.c:532 [inline]
 tracepoint_probe_register+0x5a/0x90 kernel/tracepoint.c:552
 trace_event_reg+0x150/0x260 kernel/trace/trace_events.c:306
 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
 perf_trace_event_init+0x52d/0xa30 kernel/trace/trace_event_perf.c:204
 perf_trace_init+0x1bc/0x200 kernel/trace/trace_event_perf.c:228
 perf_tp_event_init+0x8e/0x120 kernel/events/core.c:9649
 perf_try_init_event+0x14a/0x430 kernel/events/core.c:11135
 perf_init_event kernel/events/core.c:11187 [inline]
 perf_event_alloc+0xcda/0x1990 kernel/events/core.c:11465
 __do_sys_perf_event_open kernel/events/core.c:11959 [inline]
 __se_sys_perf_event_open+0x6f7/0x1b10 kernel/events/core.c:11851
 __x64_sys_perf_event_open+0xbf/0xd0 kernel/events/core.c:11851
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f8baf622969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8badc49038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f8baf84a160 RCX: 00007f8baf622969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f8baf6a4ab1 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8baf84a160 R15: 00007fff47e8f348