rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2660 jiffies s: 20093 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18540 Comm: syz.0.6320 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:get_perf_callchain+0x29/0x480 kernel/events/callchain.c:182
Code: 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 44 89 4c 24 08 45 89 c6 89 4c 24 0c 89 d3 41 89 f4 <49> 89 fd 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 49 bf
RSP: 0018:ffffc900001e0260 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880b8f35518
RBP: ffffc900001e0328 R08: 000000000000007f R09: 0000000000000000
R10: ffffffff8f9f7050 R11: ffffffff8f9f7043 R12: 0000000000000000
R13: 000000000003e22c R14: 000000000000007f R15: ffff8880241b5544
FS:  00007f82f79066c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 000000001f70c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_callchain kernel/events/core.c:7512 [inline]
 perf_prepare_sample+0x399/0x2040 kernel/events/core.c:7545
 __perf_event_output kernel/events/core.c:7730 [inline]
 perf_event_output_forward+0x163/0x2a0 kernel/events/core.c:7750
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14
 trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_finish+0x13f/0x180 kernel/trace/trace_preemptirq.c:67
 irqentry_enter+0x33/0x50 kernel/entry/common.c:382
 sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:get_random_u32_below include/linux/random.h:87 [inline]
RIP: 0010:prandom_u32_max include/linux/prandom.h:29 [inline]
RIP: 0010:rfc3315_s14_backoff_update+0x16/0xc0 net/ipv6/addrconf.c:115
Code: fb e9 96 fc ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 41 57 41 56 53 89 f3 89 fd e8 81 b1 a2 f8 e8 5c ef 9b fb 89 c0 <48> 69 c8 41 0d 03 00 81 f9 9d 39 02 00 77 07 e8 66 b1 a2 f8 eb e3
RSP: 0018:ffffc900001e0a78 EFLAGS: 00000246
RAX: 00000000a888d462 RBX: 0000000000057e40 RCX: 57d667b5cdc72300
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000018ad R08: dffffc0000000000 R09: fffffbfff215c45a
R10: fffffbfff215c45a R11: 1ffffffff215c459 R12: ffff888078012750
R13: dffffc0000000000 R14: ffff888078012604 R15: 1ffff1100f0024ea
 addrconf_rs_timer+0x2ff/0x600 net/ipv6/addrconf.c:3985
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:preempt_schedule_irq+0xac/0x150 kernel/sched/core.c:6873
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 70 bf 01 00 00 00 e8 7f cf 37 f7 e8 7a 47 67 f7 fb bf 01 00 00 00 <e8> df b9 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900039778c0 EFLAGS: 00000282
RAX: 57d667b5cdc72300 RBX: 0000000000000000 RCX: 57d667b5cdc72300
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: 0000000000000001
RBP: ffffc90003977960 R08: dffffc0000000000 R09: fffffbfff215c44f
R10: fffffbfff215c44f R11: 1ffffffff215c44e R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200072ef18
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:charge_memcg+0x244/0x380 mm/memcontrol.c:6935
Code: 08 48 89 df e8 8d 0d f9 ff 48 8b 33 48 83 fe ff 0f 84 36 01 00 00 48 c1 ee 3a 4c 89 f7 e8 d4 19 00 00 e8 4f 48 af ff fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 48 b9 00 00 00 00 00 fc ff df 48 8b 54
RSP: 0018:ffffc90003977a20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea00014b51c0 RCX: 57d667b5cdc72300
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefca0
RBP: ffffc90003977ad0 R08: dffffc0000000000 R09: fffffbfff215c44f
R10: fffffbfff215c44f R11: 1ffffffff215c44e R12: 0000000000000001
R13: 1ffffd4000296a38 R14: ffff8880781a6000 R15: ffff8880781a6950
 __mem_cgroup_charge+0x21/0x80 mm/memcontrol.c:6944
 mem_cgroup_charge include/linux/memcontrol.h:672 [inline]
 do_anonymous_page mm/memory.c:4195 [inline]
 handle_pte_fault mm/memory.c:5029 [inline]
 __handle_mm_fault mm/memory.c:5173 [inline]
 handle_mm_fault+0x22dc/0x3e70 mm/memory.c:5294
 do_user_addr_fault+0x51f/0xb10 arch/x86/mm/fault.c:1340
 handle_page_fault arch/x86/mm/fault.c:1431 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1487
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:__put_user_nocheck_4+0x3/0x11
Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f
RSP: 0018:ffffc90003977e80 EFLAGS: 00050297
RAX: 0000000000000005 RBX: 00007fffffffeffd RCX: 00002000000029c0
RDX: 0000000000000000 RSI: ffffffff8a8c1680 RDI: ffffffff8adefca0
RBP: 0000000000000005 R08: dffffc0000000000 R09: fffffbfff1c3eea6
R10: fffffbfff1c3eea6 R11: 1ffffffff1c3eea5 R12: 0000000000000000
R13: 00002000000029c0 R14: 0000000000000001 R15: 0000000000000005
 __sys_socketpair+0xb4/0x540 net/socket.c:1720
 __do_sys_socketpair net/socket.c:1786 [inline]
 __se_sys_socketpair net/socket.c:1783 [inline]
 __x64_sys_socketpair+0x97/0xb0 net/socket.c:1783
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f82f698eba9
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:00007f82f7906038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f82f6bd5fa0 RCX: 00007f82f698eba9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001
RBP: 00007f82f6a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000029c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f82f6bd6038 R14: 00007f82f6bd5fa0 R15: 00007ffdf9c50da8
 </TASK>