rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=372c/1/0x4000000000000000 softirq=91054/91054 fqs=8
rcu: 	(detected by 1, t=10502 jiffies, g=100481, q=301 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18685 Comm: ipvs-e:14:0 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0xce0/0x2050 kernel/locking/lockdep.c:5176
Code: 60 80 3c 38 00 74 12 48 89 df e8 8b 20 8b 00 48 bf 00 00 00 00 00 fc ff df 45 31 e4 48 89 5c 24 08 4c 8b 33 48 83 7c 24 28 00 <75> 30 48 c7 c0 40 a9 39 9a 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 8b
RSP: 0018:ffffc90000007a30 EFLAGS: 00000046
RAX: 1ffff11004dd8c9a RBX: ffff888026ec64d0 RCX: ffffffff8170588b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff888026ec64e0 R08: ffffffff94293807 R09: 1ffffffff2852700
R10: dffffc0000000000 R11: fffffbfff2852701 R12: 0000000000000000
R13: ffff888026ec64d8 R14: ffffffffffffffff R15: ffff888026ec6500
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 000000007e8e6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0xa1e/0xca0 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 ce e8 33 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 03 9d 9b f5 65 8b 05 e4 46 3c 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000b597920 EFLAGS: 00000206
RAX: 7089fa1b39e66d00 RBX: 1ffff920016b2f28 RCX: ffffffff9a39a903
RDX: dffffc0000000000 RSI: ffffffff8c0acb40 RDI: 0000000000000001
RBP: ffffc9000b5979b0 R08: ffffffff901bd2af R09: 1ffffffff2037a55
R10: dffffc0000000000 R11: fffffbfff2037a56 R12: dffffc0000000000
R13: 1ffff920016b2f24 R14: ffffc9000b597940 R15: 0000000000000246
 __mod_timer+0xb89/0xeb0 kernel/time/timer.c:1186
 schedule_timeout+0x1b9/0x310 kernel/time/timer.c:2614
 ip_vs_estimation_kthread+0x2af3/0x3a10 net/netfilter/ipvs/ip_vs_est.c:209
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 10460 jiffies! g100481 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:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x185a/0x4b70 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 24809 Comm: syz.4.8156 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f3/0x2ca0 kernel/smp.c:884
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 56 f3 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 01 ef 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 e5 ee
RSP: 0018:ffffc9000ea6f400 EFLAGS: 00000293
RAX: ffffffff8188e8ab RBX: 1ffff110170c8ca5 RCX: ffff88807dba5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000ea6f600 R08: ffffffff8188e87a R09: 1ffffffff2037a55
R10: dffffc0000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880b8646528 R14: ffff8880b873fc40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c281910 CR3: 0000000063abc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:938 [inline]
 flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1024
 tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:465 [inline]
 tlb_flush_mmu+0x1aa/0x680 mm/mmu_gather.c:372
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x496/0xc40 mm/mmap.c:1887
 __mmput+0x115/0x380 kernel/fork.c:1347
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x28e0 kernel/exit.c:926
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 get_signal+0x16a3/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb3c6f7e719
Code: Unable to access opcode bytes at 0x7fb3c6f7e6ef.
RSP: 002b:00007fb3c7d3e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb3c7135f88 RCX: 00007fb3c6f7e719
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb3c7135f88
RBP: 00007fb3c7135f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb3c7135f8c
R13: 0000000000000000 R14: 00007ffe10c41940 R15: 00007ffe10c41a28
 </TASK>