syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=edb/1/0x4000000000000002 softirq=5954/5955 fqs=2099 
	(detected by 1, t=10502 jiffies, g=6033, q=625)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4377 Comm: syz.2.13 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
RIP: 0010:rcu_is_watching+0x56/0xa0 kernel/rcu/tree.c:1123
Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 80 7a 58 00 48 c7 c3 c8 b2 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 2b 8b 03 65 ff 0d c5 c2 9e 7e 74 08 24 01 5b 41 5e 41 5f
RSP: 0018:ffffc90000007120 EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff8880b903b2c8 RCX: 3bd1a68ce956c300
RDX: 0000000000000100 RSI: ffffffff8a599320 RDI: ffffffff8a5992e0
RBP: ffffc90000007250 R08: dffffc0000000000 R09: fffffbfff1ad2dd6
R10: fffffbfff1ad2dd6 R11: 1ffffffff1ad2dd5 R12: 00000000ffffffe4
R13: 1ffff92000000e2c R14: ffffffff8bbbe820 R15: dffffc0000000000
FS:  00007f1645d146c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c40eff8 CR3: 00000000764e1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_read_unlock include/linux/rcupdate.h:768 [inline]
 __perf_event_output kernel/events/core.c:7799 [inline]
 perf_event_output_forward+0x1b0/0x280 kernel/events/core.c:7808
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9501
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10033
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10007
 perf_trace_preemptirq_template+0x2be/0x380 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+0x84/0x480 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 7d 16 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000077a0 EFLAGS: 00000206
RAX: 3bd1a68ce956c300 RBX: 1ffff92000000ef8 RCX: 3bd1a68ce956c300
RDX: dffffc0000000000 RSI: ffffffff8a0b15c0 RDI: ffffffff8a599340
RBP: ffffc90000007880 R08: dffffc0000000000 R09: fffffbfff1ff6e39
R10: fffffbfff1ff6e39 R11: 1ffffffff1ff6e38 R12: ffffffff8c120800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 ndisc_send_skb+0xdc4/0x14a0 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3957
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 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:seqcount_lockdep_reader_access+0x126/0x170 include/linux/seqlock.h:106
Code: 9b ca ff 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 66 43 c7 44 27 09 00 00 43 c6 44 27 0b 00
RSP: 0018:ffffc9000334f2c0 EFLAGS: 00000206
RAX: 3bd1a68ce956c300 RBX: ffff88813fffb7c0 RCX: 3bd1a68ce956c300
RDX: dffffc0000000000 RSI: ffffffff8a0b15c0 RDI: ffffffff8a599340
RBP: ffffc9000334f380 R08: dffffc0000000000 R09: fffffbfff1ff6e19
R10: fffffbfff1ff6e19 R11: 1ffffffff1ff6e18 R12: dffffc0000000000
R13: 0000000000000a02 R14: ffffffff81b342f7 R15: 1ffff92000669e58
 read_seqbegin include/linux/seqlock.h:897 [inline]
 zone_span_seqbegin include/linux/memory_hotplug.h:83 [inline]
 page_outside_zone_boundaries mm/page_alloc.c:580 [inline]
 bad_range+0x77/0x2d0 mm/page_alloc.c:607
 rmqueue mm/page_alloc.c:3760 [inline]
 get_page_from_freelist+0x1b56/0x1c60 mm/page_alloc.c:4189
 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474
 __get_free_pages+0x8/0x30 mm/page_alloc.c:5511
 kasan_populate_vmalloc_pte+0x21/0xc0 mm/kasan/shadow.c:266
 apply_to_pte_range mm/memory.c:2573 [inline]
 apply_to_pmd_range mm/memory.c:2617 [inline]
 apply_to_pud_range mm/memory.c:2653 [inline]
 apply_to_p4d_range mm/memory.c:2689 [inline]
 __apply_to_page_range+0x95c/0xc80 mm/memory.c:2725
 alloc_vmap_area+0x19f7/0x1b20 mm/vmalloc.c:1565
 __get_vm_area_node+0x14f/0x2d0 mm/vmalloc.c:2423
 __vmalloc_node_range+0xef/0x8b0 mm/vmalloc.c:3020
 __vmalloc_node mm/vmalloc.c:3080 [inline]
 __vmalloc+0x76/0x80 mm/vmalloc.c:3094
 pcpu_mem_zalloc mm/percpu.c:516 [inline]
 pcpu_alloc_chunk mm/percpu.c:1472 [inline]
 pcpu_create_chunk+0x341/0xbc0 mm/percpu-vm.c:338
 pcpu_alloc+0x733/0x1770 mm/percpu.c:1834
 bpf_map_alloc_percpu+0xc5/0x150 kernel/bpf/syscall.c:455
 prealloc_init kernel/bpf/hashtab.c:335 [inline]
 htab_map_alloc+0xccb/0x15a0 kernel/bpf/hashtab.c:554
 find_and_alloc_map kernel/bpf/syscall.c:127 [inline]
 map_create+0x485/0x2170 kernel/bpf/syscall.c:880
 __sys_bpf+0x2a4/0x670 kernel/bpf/syscall.c:4633
 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
 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: 0033:0x7f1647eacb69
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:00007f1645d14038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f16480d3fa0 RCX: 00007f1647eacb69
RDX: 0000000000000048 RSI: 0000200000000840 RDI: 0000000000000000
RBP: 00007f1647f2fdf1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f16480d3fa0 R15: 00007ffc362f0688
 </TASK>