RBP: 00007fff8720d4d0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbd6d015fac R14: 00007fff873430b0 R15: 0000000000001ae6
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 119s! [syz.3.20:394]
Modules linked in:
CPU: 1 PID: 394 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:skb_mark_not_on_list include/linux/skbuff.h:1805 [inline]
RIP: 0010:validate_xmit_skb_list+0x51/0x120 net/core/dev.c:3826
Code: 00 00 fc ff df 45 31 ff 48 c7 45 d0 00 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 63 0e c4 fd 4d 8b 34 24 <49> c7 04 24 00 00 00 00 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 42 80
RSP: 0018:ffffc900001b0360 EFLAGS: 00000246
RAX: 1ffff11025d22db8 RBX: ffff888113e6c000 RCX: ffff8881143d9440
RDX: 0000000000000100 RSI: ffff888113e6c000 RDI: ffff88812e916dc0
RBP: ffffc900001b0390 R08: 0000000000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffff52000036088 R12: ffff88812e916dc0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557dc01500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd6ce44b91 CR3: 00000001307e5000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 sch_direct_xmit+0xf3/0x900 net/sched/sch_generic.c:330
 __dev_xmit_skb net/core/dev.c:3931 [inline]
 __dev_queue_xmit+0x1638/0x3470 net/core/dev.c:4336
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 neigh_hh_output include/net/neighbour.h:536 [inline]
 neigh_output include/net/neighbour.h:550 [inline]
 ip6_finish_output2+0x15bf/0x18a0 net/ipv6/ip6_output.c:138
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x5f9/0xbb0 net/ipv6/ip6_output.c:216
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1fa/0x410 net/ipv6/ip6_output.c:237
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x7dc/0xcc0 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x670/0x870 net/ipv6/ndisc.c:723
 addrconf_rs_timer+0x2cf/0x610 net/ipv6/addrconf.c:4005
 call_timer_fn+0x46/0x2a0 kernel/time/timer.c:1553
 expire_timers kernel/time/timer.c:1604 [inline]
 __run_timers+0x65b/0x9f0 kernel/time/timer.c:1875
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x173/0x7b0 kernel/sched/core.c:5302
Code: 80 3c 2b 00 74 08 4c 89 f7 e8 49 9d 69 00 4d 8b 2e 4d 85 ed 0f 85 cd 00 00 00 4c 89 e7 e8 15 93 b4 03 fb 49 8d 9f 48 0b 00 00 <48> 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc90000af7be0 EFLAGS: 00000282
RAX: 0000000080000001 RBX: ffff8881143d9f88 RCX: 0000000000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffc90000af7c30 R08: ffffffff8792ebf3 R09: 1ffffffff0f25d7e
R10: dffffc0000000000 R11: fffffbfff0f25d7f R12: ffff8881f6f37d80
R13: 0000000000000000 R14: ffff8881f6f388e0 R15: ffff8881143d9440
 context_switch kernel/sched/core.c:5428 [inline]
 __schedule+0xbae/0x1500 kernel/sched/core.c:6755
 preempt_schedule_irq+0xaa/0x120 kernel/sched/core.c:7067
 raw_irqentry_exit_cond_resched+0x29/0x30 kernel/entry/common.c:396
 irqentry_exit+0x37/0x40 kernel/entry/common.c:439
 sysvec_apic_timer_interrupt+0x64/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:exit_to_user_mode_loop+0x4a/0xb0 kernel/entry/common.c:164
Code: 00 e8 ba ca 5a 00 e8 d5 6c f8 00 fa e8 1f 3d 9b 03 65 48 8b 05 47 52 a2 7e 4c 8b 30 41 f7 c6 0e 30 02 00 74 5b fb 41 f6 c6 08 <74> 05 e8 ff 80 a0 03 41 f7 c6 00 10 00 00 74 08 48 89 df e8 be 9e
RSP: 0000:ffffc90000af7ed0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000af7f58 RCX: 0943bfc11ec06a00
RDX: 1ffffffff0f6e608 RSI: 0000000000000008 RDI: ffffc90000af7f58
RBP: ffffc90000af7ee0 R08: ffffffff87b73048 R09: ffffffff87b73058
R10: ffffffff87b73043 R11: 1ffffffff0f6e608 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000008 R15: ffff8881143d9440
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316
 irqentry_exit+0x12/0x40 kernel/entry/common.c:419
 sysvec_apic_timer_interrupt+0x64/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0033:0x7fff8734779e
Code: 00 0f 84 db 00 00 00 48 8d 1d fe b8 ff ff 89 f8 48 c1 e0 04 4c 8d 74 03 20 44 8b 3b 41 f6 c7 01 75 38 8b 43 04 83 f8 01 75 34 <0f> 01 f9 66 90 48 c1 e2 20 48 09 c2 48 85 d2 0f 88 e8 00 00 00 4d
RSP: 002b:00007fff8720d4a0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00007fff87343080 RCX: 0000000000000001
RDX: 00007fbd6ceb9b40 RSI: 00007fff8720d550 RDI: 0000000000000001
RBP: 00007fff8720d4d0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbd6d015fac R14: 00007fff873430b0 R15: 0000000000001ae6
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 395 Comm: syz.6.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x7e/0x80 kernel/kcov.c:322
Code: c1 e1 05 4c 8d 51 28 4d 39 ca 77 1e 49 ff c0 4c 89 02 48 c7 44 0a 08 07 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 <5d> c3 90 90 90 90 90 90 90 90 90 90 90 b8 00 1e 12 56 48 8b 4e 08
RSP: 0018:ffffc90000006c90 EFLAGS: 00000006
RAX: ffffffff8100fe87 RBX: ffffc90000006e2c RCX: ffff8881143da880
RDX: 0000000000010100 RSI: ffffffff8167f319 RDI: 0000000000000000
RBP: ffffc90000006c90 R08: ffffc90000006d01 R09: ffffc90000006d00
R10: dffffc0000000000 R11: fffff52000000dac R12: ffffc90000006e2c
R13: dffffc0000000000 R14: ffffffff8167f319 R15: 1ffff92000000dc5
FS:  0000555572102500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33563fff CR3: 00000001307c4000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_callchain_kernel+0x327/0x6c0 arch/x86/events/core.c:2805
 get_perf_callchain+0x236/0x490 kernel/events/callchain.c:204
 perf_callchain kernel/events/core.c:7464 [inline]
 perf_prepare_sample+0x399/0x1d40 kernel/events/core.c:7497
 __perf_event_output kernel/events/core.c:7682 [inline]
 perf_event_output_forward+0xd1/0x1a0 kernel/events/core.c:7702
 __perf_event_overflow+0x437/0x620 kernel/events/core.c:9448
 perf_swevent_overflow kernel/events/core.c:9531 [inline]
 perf_swevent_event+0x243/0x440 kernel/events/core.c:9582
 perf_tp_event+0x75b/0xa20 kernel/events/core.c:10016
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:9984
 perf_trace_x86_irq_vector+0x233/0x2c0 arch/x86/include/asm/trace/irq_vectors.h:13
 trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:41 [inline]
 __sysvec_apic_timer_interrupt+0x421/0x440 arch/x86/kernel/apic/apic.c:1125
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x53/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
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+0x74e/0x18a0 net/ipv6/ip6_output.c:125
Code: 85 ed 4c 8b 74 24 38 0f 84 0a 03 00 00 49 8d 9d 78 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 52 97 5c fd <4c> 39 33 74 0d e8 38 fc 16 fd 4c 89 f9 e9 8a 01 00 00 49 8d 9d 90
RSP: 0018:ffffc90000007700 EFLAGS: 00000246
RAX: 1ffff11025a2392f RBX: ffff88812d11c978 RCX: 0000000000000017
RDX: 0000000000000100 RSI: 0000000000000017 RDI: ffff888114cedb80
RBP: ffffc900000078a0 R08: ffff8881143da880 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000100 R12: dffffc0000000000
R13: ffff88812d11c800 R14: ffff888121b5a000 R15: dffffc0000000000
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x5f9/0xbb0 net/ipv6/ip6_output.c:216
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1fa/0x410 net/ipv6/ip6_output.c:237
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x7dc/0xcc0 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x670/0x870 net/ipv6/ndisc.c:723
 addrconf_rs_timer+0x2cf/0x610 net/ipv6/addrconf.c:4005
 call_timer_fn+0x46/0x2a0 kernel/time/timer.c:1553
 expire_timers kernel/time/timer.c:1604 [inline]
 __run_timers+0x65b/0x9f0 kernel/time/timer.c:1875
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:generic_exec_single+0x2bc/0x3b0 kernel/smp.c:-1
Code: 74 71 e8 e7 7d 09 00 43 0f b6 04 3e 84 c0 0f 85 c7 00 00 00 41 c7 04 24 00 00 00 00 bb fa ff ff ff eb 11 e8 c6 7d 09 00 31 db <49> bf 00 00 00 00 00 fc ff df 48 c7 44 24 20 0e 36 e0 45 4b c7 44
RSP: 0018:ffffc90000b07a20 EFLAGS: 00000293
RAX: ffffffff8167f81e RBX: 0000000000000000 RCX: ffff8881143da880
RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc90000b07ad0 R08: ffff8881143da880 R09: fffff52000160e80
R10: 0000000000000000 R11: ffffffff81980270 R12: ffffc90000b07b28
R13: 1ffff92000160f48 R14: ffffc90000b07c60 R15: 0000000000000200
 smp_call_function_single+0x1d9/0x490 kernel/smp.c:784
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x4b8/0x760 kernel/events/core.c:2935
 __do_sys_perf_event_open kernel/events/core.c:12775 [inline]
 __se_sys_perf_event_open+0x12b1/0x1bb0 kernel/events/core.c:12369
 __x64_sys_perf_event_open+0xbf/0xd0 kernel/events/core.c:12369
 x64_sys_call+0x385/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:299
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f573c19cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9c98a468 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f573c415fa0 RCX: 00007f573c19cdd9
RDX: afffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f573c232d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f573c415fac R14: 00007f573c415fa0 R15: 00007f573c415fa0
 </TASK>