rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=38f4/1/0x4000000000000000 softirq=37695/37695 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=31541, q=234 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11037 Comm: syz.3.1248 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:570 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1117 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x9c/0x6f0 kernel/locking/lockdep.c:5860
Code: 00 31 c0 0f 1f 44 00 00 48 c7 c5 0c d9 03 00 65 8b 6d 00 83 fd 07 0f 87 22 05 00 00 89 ed be 08 00 00 00 48 89 e8 48 c1 e8 06 <48> 8d 3c c5 50 39 5f 90 e8 07 10 86 00 48 0f a3 2d 6f 7f e8 0e 0f
RSP: 0018:ffffc90000a18c60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff9200014318e RCX: 0000000000000002
RDX: 1ffffffff3549f2e RSI: 0000000000000008 RDI: ffffffff9aa4f978
RBP: 0000000000000001 R08: 0000000000000001 R09: fffff52000143196
R10: 0000000000000003 R11: 0000000000000005 R12: ffffffff9aa4f978
R13: dffffc0000000000 R14: ffff8880667e1340 R15: 1ffff920001431aa
FS:  00007fb93596c6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003c80 CR3: 000000006f4d0000 CR4: 00000000003526f0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x1a/0x80 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x1ef/0x370 lib/debugobjects.c:888
 debug_hrtimer_deactivate kernel/time/hrtimer.c:433 [inline]
 debug_deactivate kernel/time/hrtimer.c:475 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1707 [inline]
 __hrtimer_run_queues+0x47c/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5814
Code: b8 ff ff ff ff 65 0f c1 05 e0 c1 8b 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc9000f936a30 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff92001f26d47 RCX: ffffffff8175d18e
RDX: 0000000000000001 RSI: ffffffff8b6cdce0 RDI: ffffffff8bd1ede0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2dca3b3
R10: ffffffff96e51d9f R11: 0000000000000003 R12: 0000000000000000
R13: ffff88809307e058 R14: 0000000000000000 R15: 0000000000000000
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]
 _raw_write_lock_bh+0x33/0x40 kernel/locking/spinlock.c:334
 __neigh_event_send+0x3b/0x13e0 net/core/neighbour.c:1128
 neigh_event_send_probe include/net/neighbour.h:463 [inline]
 neigh_event_send include/net/neighbour.h:469 [inline]
 neigh_event_send include/net/neighbour.h:467 [inline]
 neigh_resolve_output+0x5ed/0x950 net/core/neighbour.c:1498
 neigh_output include/net/neighbour.h:539 [inline]
 ip6_finish_output2+0xb1b/0x2070 net/ipv6/ip6_output.c:141
 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
 ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip6_xmit+0x1234/0x2130 net/ipv6/ip6_output.c:366
 sctp_v6_xmit+0xc9a/0x1180 net/sctp/ipv6.c:248
 sctp_packet_transmit+0x1e89/0x2fd0 net/sctp/output.c:653
 sctp_packet_singleton+0x19f/0x370 net/sctp/outqueue.c:783
 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline]
 sctp_outq_flush+0x54d/0x3380 net/sctp/outqueue.c:1212
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1818 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
 sctp_do_sm+0x179c/0x5c90 net/sctp/sm_sideeffect.c:1169
 sctp_primitive_ASSOCIATE+0x9c/0xd0 net/sctp/primitive.c:73
 sctp_sendmsg_to_asoc+0xa4d/0x1ad0 net/sctp/socket.c:1841
 sctp_sendmsg+0xf0a/0x1eb0 net/sctp/socket.c:2031
 inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0x98c/0xc90 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 __sys_sendmmsg+0x201/0x420 net/socket.c:2726
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb934b85d29
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:00007fb93596c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fb934d75fa0 RCX: 00007fb934b85d29
RDX: 0000000000000001 RSI: 0000000020003a00 RDI: 0000000000000004
RBP: 00007fb934c01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000004c040 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb934d75fa0 R15: 00007ffdf7901ee8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g31541 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=27878
rcu: rcu_preempt kthread starved for 10502 jiffies! g31541 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>