rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (3 ticks this GP) idle=a6f/1/0x4000000000000002 softirq=36366/36366 fqs=0 
	(detected by 1, t=10502 jiffies, g=51141, q=1093)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13130 Comm: syz.2.1739 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:perf_get_guest_cbs include/linux/perf_event.h:1274 [inline]
RIP: 0010:perf_misc_flags+0x51/0x1b0 arch/x86/events/core.c:2961
Code: 00 74 0c 48 c7 c7 e0 23 32 96 e8 0a 03 bd 00 4c 8b 35 13 14 31 15 e8 5e cc b8 08 89 c5 31 ff 89 c6 e8 23 e6 77 00 85 ed 74 1b <e8> 0a db 62 00 89 c5 31 ff 89 c6 e8 0f e6 77 00 85 ed 74 7c e8 a6
RSP: 0018:ffffc90000007018 EFLAGS: 00000002
RAX: ffffffff81010fdd RBX: ffff8880b90351c8 RCX: ffff8880783b5940
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900000071b7 R09: ffffc90000007180
R10: dffffc0000000000 R11: fffff52000000e37 R12: dffffc0000000000
R13: ffffc900000071e6 R14: ffffffff8c125d00 R15: dffffc0000000000
FS:  00007fe0ba4246c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8e9f2e57e CR3: 00000000791e3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_prepare_sample+0x132/0x1cb0 kernel/events/core.c:7622
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 c2 22 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007780 EFLAGS: 00000206
RAX: f833d41b33b20500 RBX: 1ffff92000000ef4 RCX: f833d41b33b20500
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007860 R08: ffffffff901cb1c7 R09: 1ffffffff2039638
R10: dffffc0000000000 R11: fffffbfff2039639 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ndisc_send_skb+0xd39/0x1410 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3959
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:perf_trace_init+0x9e/0x2d0 kernel/trace/trace_event_perf.c:223
Code: 40 c6 36 8c 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 40 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 77 41 f8 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d
RSP: 0018:ffffc9000316fc28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8d5b8d20 RCX: 0000000000080000
RDX: ffffc9000fe30000 RSI: 0000000000010533 RDI: 0000000000010534
RBP: 0000000000000002 R08: ffffc9000316fa07 R09: 1ffff9200062df40
R10: dffffc0000000000 R11: fffff5200062df41 R12: 0000000000000b5e
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000116
 perf_tp_event_init+0x89/0x110 kernel/events/core.c:10102
 perf_try_init_event+0x12b/0x3d0 kernel/events/core.c:11601
 perf_init_event kernel/events/core.c:11665 [inline]
 perf_event_alloc+0xf78/0x21d0 kernel/events/core.c:11957
 __do_sys_perf_event_open kernel/events/core.c:12495 [inline]
 __se_sys_perf_event_open+0x5de/0x1bb0 kernel/events/core.c:12387
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe0bc1cbe59
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:00007fe0ba424028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe0bc453fa0 RCX: 00007fe0bc1cbe59
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007fe0bc261e6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0bc454038 R14: 00007fe0bc453fa0 R15: 00007fffee96d218
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g51141 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=31721
rcu: rcu_preempt kthread starved for 10502 jiffies! g51141 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:27376 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11c3/0x4350 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
 rcu_gp_fqs_loop+0x2be/0x11f0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9a/0x370 kernel/rcu/tree.c:2145
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13130 Comm: syz.2.1739 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_acquire+0x66/0x400 kernel/locking/lockdep.c:5591
Code: 24 c0 00 00 00 49 bf 00 00 00 00 00 fc ff df 48 c7 44 24 60 b3 8a b5 41 48 c7 44 24 68 39 e5 bb 8b 48 c7 44 24 70 10 d8 5c 81 <4c> 8d 6c 24 60 49 c1 ed 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4b 89 44
RSP: 0018:ffffc90000006ec0 EFLAGS: 00000086
RAX: f833d41b33b20500 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8c31ef20
RBP: ffffc90000006fe0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000000e37 R12: ffffffff8c31ef20
R13: ffffc90000007180 R14: 0000000000000048 R15: dffffc0000000000
FS:  00007fe0ba4246c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8e9f2e57e CR3: 00000000791e3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0xa5/0xa30 kernel/events/ring_buffer.c:271
 __perf_event_output kernel/events/core.c:7804 [inline]
 perf_event_output_forward+0x19b/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 c2 22 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007780 EFLAGS: 00000206
RAX: f833d41b33b20500 RBX: 1ffff92000000ef4 RCX: f833d41b33b20500
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007860 R08: ffffffff901cb1c7 R09: 1ffffffff2039638
R10: dffffc0000000000 R11: fffffbfff2039639 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ndisc_send_skb+0xd39/0x1410 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3959
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:perf_trace_init+0x9e/0x2d0 kernel/trace/trace_event_perf.c:223
Code: 40 c6 36 8c 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 40 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 77 41 f8 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d
RSP: 0018:ffffc9000316fc28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8d5b8d20 RCX: 0000000000080000
RDX: ffffc9000fe30000 RSI: 0000000000010533 RDI: 0000000000010534
RBP: 0000000000000002 R08: ffffc9000316fa07 R09: 1ffff9200062df40
R10: dffffc0000000000 R11: fffff5200062df41 R12: 0000000000000b5e
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000116
 perf_tp_event_init+0x89/0x110 kernel/events/core.c:10102
 perf_try_init_event+0x12b/0x3d0 kernel/events/core.c:11601
 perf_init_event kernel/events/core.c:11665 [inline]
 perf_event_alloc+0xf78/0x21d0 kernel/events/core.c:11957
 __do_sys_perf_event_open kernel/events/core.c:12495 [inline]
 __se_sys_perf_event_open+0x5de/0x1bb0 kernel/events/core.c:12387
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe0bc1cbe59
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:00007fe0ba424028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe0bc453fa0 RCX: 00007fe0bc1cbe59
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007fe0bc261e6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0bc454038 R14: 00007fe0bc453fa0 R15: 00007fffee96d218
 </TASK>