rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P48/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=11801, q=579 ncpus=2)
task:kworker/u4:3 state:R running task stack:23728 pid:48 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:filter_irq_stacks+0x29/0x90 kernel/stacktrace.c:395
Code: 00 f3 0f 1e fa 41 57 41 56 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 <48> c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 a4 62 68 00 49 8b 04
RSP: 0018:ffffc90000b97428 EFLAGS: 00000202
RAX: ffffc90000b974d8 RBX: 0000000000000005 RCX: 0000000000000001
RDX: 0000000000000801 RSI: 000000000000000d RDI: ffffc90000b974b0
RBP: 0000000000000820 R08: ffff88801c2f8000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000d
R13: dffffc0000000000 R14: ffffc90000b974b0 R15: ffffc90000b974d8
__stack_depot_save+0x1f/0x630 lib/stackdepot.c:377
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x5f/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:600 [inline]
dst_cow_metrics_generic+0x56/0x1c0 net/core/dst.c:195
dst_metrics_write_ptr include/net/dst.h:133 [inline]
dst_metric_set include/net/dst.h:194 [inline]
icmp6_dst_alloc+0x22e/0x400 net/ipv6/route.c:3319
mld_sendpack+0x673/0xd70 net/ipv6/mcast.c:1812
ipv6_mc_dad_complete+0x88/0x210 net/ipv6/mcast.c:2248
addrconf_dad_completed+0x6d0/0xd40 net/ipv6/addrconf.c:4304
addrconf_dad_work+0xc4e/0x14e0 net/ipv6/addrconf.c:-1
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: rcu_preempt kthread starved for 10540 jiffies! g11801 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27752 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5963 Comm: syz.1.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:196
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 f3 0f 1e fa 89 f6 31 d2 e9 e7 e7 18 03 0f 1f 80 00 00 00
RSP: 0018:ffffc900001f0e58 EFLAGS: 00000046
RAX: 000000000007a622 RBX: ffff8880b8f28280 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000007a622 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff8e4a7fef R09: 1ffffffff1c94ffd
R10: dffffc0000000000 R11: fffffbfff1c94ffe R12: dffffc0000000000
R13: 0000000010006d0d R14: 000000000007a622 R15: 0000000000000020
FS: 0000555584737500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d963fff CR3: 000000002b497000 CR4: 00000000003506e0
Call Trace:
apic_write arch/x86/include/asm/apic.h:404 [inline]
lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:448
clockevents_program_event+0x1c0/0x310 kernel/time/clockevents.c:334
hrtimer_interrupt+0x5a1/0x9c0 kernel/time/hrtimer.c:1889
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0a 90 ef f6 48 89 df e8 22 62 f0 f6 e8 6d 08 14 f7 fb bf 01 00 00 00 32 79 e3 f6 65 8b 05 43 c5 8b 75 85 c0 74 02 5b c3 e8 60 a9 88
RSP: 0018:ffffc9000498fc98 EFLAGS: 00000282
RAX: 60ed385548028800 RBX: ffff88805e9c3780 RCX: 60ed385548028800
RDX: dffffc0000000000 RSI: ffffffff8aaabca0 RDI: 0000000000000001
RBP: ffff88805e9c3a18 R08: ffffffff8e4a7fef R09: 1ffffffff1c94ffd
R10: dffffc0000000000 R11: fffffbfff1c94ffe R12: 1ffff1100bd38743
R13: 0000000000000011 R14: dffffc0000000000 R15: 0000000000000000
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x11f5/0x1400 kernel/signal.c:2905
arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0730d8eec9
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:00007ffcfb356d08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f0730fe5fa0 RCX: 00007f0730d8eec9
RDX: 0000200000000240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f0730e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0730fe5fa0 R14: 00007f0730fe5fa0 R15: 0000000000000004
sched: RT throttling activated