rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=167861, q=104 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4295075801-4295065300), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g167861 f0x2 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:26920 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5393 [inline]
 __schedule+0x15ae/0x4700 kernel/sched/core.c:6722
 schedule+0xbd/0x170 kernel/sched/core.c:6796
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 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
 </TASK>
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: 31953 Comm: syz.2.6515 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:187
Code: 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 <4c> 01 fb 41 80 3b 00 0f 85 8d 01 00 00 49 ff c3 48 ff c3 75 ee e9
RSP: 0018:ffffc900001ef588 EFLAGS: 00000002
RAX: 0000000000000001 RBX: e00000000dbbb95f RCX: ffffffff8168ebcd
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92223500
RBP: ffffc900001ef808 R08: ffffffff92223507 R09: 1ffffffff24446a0
R10: dffffc0000000000 R11: fffffbfff24446a0 R12: 0000000000000001
R13: ffff88805d253c00 R14: fffffbfff24446a1 R15: 1ffffffff24446a0
FS:  00007f8ef627e6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000780f8000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 00002000000009c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xe8d/0x7eb0 kernel/locking/lockdep.c:5141
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5790
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0xde/0xa60 kernel/events/ring_buffer.c:273
 __perf_event_output kernel/events/core.c:7964 [inline]
 perf_event_output_forward+0x25a/0x3e0 kernel/events/core.c:7982
 __perf_event_overflow+0x461/0x660 kernel/events/core.c:9707
 perf_event_overflow kernel/events/core.c:9728 [inline]
 perf_swevent_hrtimer+0x437/0x610 kernel/events/core.c:11217
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x4e8/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
 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+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 d5 cf 0f 00 eb 15 e8 ce cf 0f 00 e8 c9 eb 1e 09 4d 85 e4 74 ea e8 bf cf 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001f0200 EFLAGS: 00000246
RAX: ffffffff81780421 RBX: 0000000000000000 RCX: ffff88805d253c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001f02b8 R08: ffffffff922235f7 R09: 1ffffffff24446be
R10: dffffc0000000000 R11: fffffbfff24446bf R12: 0000000000000200
R13: 000001fb6ca015d2 R14: 1ffff9200003e040 R15: dffffc0000000000
 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get_with_offset+0x103/0x330 kernel/time/timekeeping.c:891
 ktime_get_real include/linux/timekeeping.h:79 [inline]
 netif_rx_internal+0x33d/0x4e0 net/core/dev.c:5217
 __netif_rx+0x78/0xc0 net/core/dev.c:5260
 veth_forward_skb drivers/net/veth.c:325 [inline]
 veth_xmit+0x57a/0xa30 drivers/net/veth.c:378
 __netdev_start_xmit include/linux/netdevice.h:5003 [inline]
 netdev_start_xmit include/linux/netdevice.h:5017 [inline]
 xmit_one net/core/dev.c:3671 [inline]
 dev_hard_start_xmit+0x269/0x790 net/core/dev.c:3687
 __dev_queue_xmit+0x1d1e/0x3a30 net/core/dev.c:4518
 neigh_output include/net/neighbour.h:547 [inline]
 ip6_finish_output2+0xe61/0x1550 net/ipv6/ip6_output.c:138
 NF_HOOK_COND include/linux/netfilter.h:305 [inline]
 ip6_output+0x33b/0x530 net/ipv6/ip6_output.c:242
 dst_output include/net/dst.h:470 [inline]
 NF_HOOK include/linux/netfilter.h:316 [inline]
 ndisc_send_skb+0xbb9/0x1480 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4043
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:generic_exec_single+0x477/0x4e0 kernel/smp.c:418
Code: 75 11 e8 ec 13 0b 00 48 85 db 75 16 e8 e2 13 0b 00 eb 15 e8 db 13 0b 00 e8 d6 2f 1a 09 48 85 db 74 ea e8 cc 13 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc9000457fa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88805d253c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000457fad0 R08: ffffffff9222360f R09: 1ffffffff24446c1
R10: dffffc0000000000 R11: fffffbfff24446c2 R12: 1ffff920008aff44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920008aff65
 smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2959
 __do_sys_perf_event_open kernel/events/core.c:12951 [inline]
 __se_sys_perf_event_open+0x180d/0x1d40 kernel/events/core.c:12593
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8ef539f559
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:00007f8ef627e028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f8ef5625fa0 RCX: 00007f8ef539f559
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000640
RBP: 00007f8ef5436b20 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ef5626038 R14: 00007f8ef5625fa0 R15: 00007fffe01da778
 </TASK>