RBP: 00007f33aee32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f33af016128 R14: 00007f33af016090 R15: 00007ffdb5561868
watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [syz.4.395:1933]
Modules linked in:
CPU: 0 PID: 1933 Comm: syz.4.395 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__ipv6_chk_addr_and_flags+0x11e/0x390 net/ipv6/addrconf.c:1949
Code: 16 5c fd 41 c1 e7 03 4d 03 3c 24 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 ab 16 5c fd 4d 8b 27 4d 85 e4 0f 95 c0 <49> 81 c4 18 ff ff ff 0f 95 c1 84 c8 75 0a e8 7f 7b 16 fd e9 16 02
RSP: 0018:ffffc90000006e68 EFLAGS: 00000246
RAX: 1ffff11021c96600 RBX: ffff888132328c28 RCX: ffff8881319b6000
RDX: 0000000000000100 RSI: ffff888132328c28 RDI: ffff88810e516a78
RBP: ffffc90000006ec0 R08: 0000000000000000 R09: 0000000000000040
R10: 0000000000000005 R11: 0000000000000100 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff11026465186 R15: ffff88810e4b3750
FS: 00007f33afc316c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb4a73e80 CR3: 000000012c0d6000 CR4: 00000000003506b0
DR0: 0000200000000300 DR1: 00000000000000fd DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ipv6_chk_addr_and_flags net/ipv6/addrconf.c:1978 [inline]
ipv6_chk_addr+0x3a/0x50 net/ipv6/addrconf.c:1919
icmp6_send+0x339/0x1700 net/ipv6/icmp.c:479
__icmpv6_send include/linux/icmpv6.h:28 [inline]
icmpv6_send include/linux/icmpv6.h:49 [inline]
ip6_link_failure+0x36/0x190 net/ipv6/route.c:2828
dst_link_failure include/net/dst.h:423 [inline]
xfrmi_xmit2 net/xfrm/xfrm_interface_core.c:512 [inline]
xfrmi_xmit+0x91b/0x12b0 net/xfrm/xfrm_interface_core.c:565
__netdev_start_xmit include/linux/netdevice.h:4930 [inline]
netdev_start_xmit include/linux/netdevice.h:4944 [inline]
xmit_one net/core/dev.c:3694 [inline]
dev_hard_start_xmit+0x20b/0x750 net/core/dev.c:3710
__dev_queue_xmit+0x195d/0x3470 net/core/dev.c:4374
dev_queue_xmit include/linux/netdevice.h:3085 [inline]
neigh_connected_output+0x469/0x500 net/core/neighbour.c:1592
neigh_output include/net/neighbour.h:552 [inline]
ip6_finish_output2+0x1606/0x18a0 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
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:ffffc900029475a0 EFLAGS: 00000246
RAX: ffffffff8167f81e RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90003a73000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90002947650 R08: ffff88812949f0c7 R09: fffff52000528e50
R10: 0000000000000000 R11: ffffffff81980270 R12: ffffc900029476a8
R13: 1ffff92000528eb8 R14: ffffc900029477e0 R15: 0000000000000200
smp_call_function_single+0x1d9/0x490 kernel/smp.c:784
task_function_call kernel/events/core.c:120 [inline]
event_function_call+0x2a8/0x440 kernel/events/core.c:289
perf_remove_from_context+0xa6/0x1b0 kernel/events/core.c:2452
perf_event_release_kernel+0x1e4/0x8c0 kernel/events/core.c:5180
perf_release+0x3b/0x40 kernel/events/core.c:5274
__fput+0x1fc/0x8f0 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x1e1/0x250 kernel/task_work.c:203
get_signal+0x12e6/0x1520 kernel/signal.c:2668
arch_do_signal_or_restart+0xd1/0x1140 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f33aed9ce59
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:00007f33afc30fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffffc RBX: 00007f33af016090 RCX: 00007f33aed9ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000640c7000
RBP: 00007f33aee32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f33af016128 R14: 00007f33af016090 R15: 00007ffdb5561868
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x88d/0x980 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 6e 75 09 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 3a 71 09 00 e9 38 ff ff ff f3 90 <41> 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff
RSP: 0018:ffffc900000a7840 EFLAGS: 00000293
RAX: ffffffff81680539 RBX: dffffc0000000000 RCX: ffff888100299440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900000a7978 R08: ffff8881f6f390d7 R09: 1ffff1103ede721a
R10: 0000000000000000 R11: ffffffff8134c110 R12: 1ffff1103ede7218
R13: 1ffff1103edc7ae1 R14: 0000000000000000 R15: ffff8881f6e3d708
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f350dd45000 CR3: 000000000700f000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1165
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1574 [inline]
text_poke_bp_batch+0x1cf/0x600 arch/x86/kernel/alternative.c:1774
text_poke_flush arch/x86/kernel/alternative.c:1965 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1972
arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
__jump_label_update+0x37c/0x3a0 kernel/jump_label.c:451
jump_label_update+0x39b/0x450 kernel/jump_label.c:797
static_key_disable_cpuslocked+0xc9/0x1a0 kernel/jump_label.c:203
static_key_disable+0x1a/0x30 kernel/jump_label.c:211
toggle_allocation_gate+0x3a5/0x440 mm/kfence/core.c:835
process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
worker_thread+0xa29/0x11e0 kernel/workqueue.c:2449
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295