rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7812/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=21061, q=716 ncpus=2)
task:syz.1.673       state:R  running task     stack:20320 pid:7812  tgid:7810  ppid:5833   task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5253 [inline]
 __schedule+0x17b2/0x4d40 kernel/sched/core.c:6861
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7188
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 b4 a1 d7 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9001de5f0f8 EFLAGS: 00000206
RAX: 7625dd4171cf9c00 RBX: 0000000000000000 RCX: 7625dd4171cf9c00
RDX: 000000005a44979c RSI: ffffffff8d9489f3 RDI: ffffffff8bbfa900
RBP: ffffffff8173def5 R08: ffffffff8173def5 R09: ffffffff8df414c0
R10: dffffc0000000000 R11: ffffffff81acfc00 R12: 0000000000000002
R13: ffffffff8df414c0 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:867 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:332
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1845
 prep_new_page mm/page_alloc.c:1853 [inline]
 get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3879
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5178
 __alloc_pages_noprof mm/page_alloc.c:5212 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5132
 ___alloc_pages_bulk mm/kasan/shadow.c:345 [inline]
 __kasan_populate_vmalloc mm/kasan/shadow.c:370 [inline]
 kasan_populate_vmalloc+0xd1/0x270 mm/kasan/shadow.c:435
 alloc_vmap_area+0xd4e/0x1470 mm/vmalloc.c:2098
 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3193
 get_vm_area+0x80/0xb0 mm/vmalloc.c:3235
 arena_map_alloc+0x256/0x520 kernel/bpf/arena.c:125
 map_create+0xaa6/0x1640 kernel/bpf/syscall.c:1512
 __sys_bpf+0x5f0/0x860 kernel/bpf/syscall.c:6131
 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6257 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1913f8f749
RSP: 002b:00007f1914db5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f19141e5fa0 RCX: 00007f1913f8f749
RDX: 0000000000000050 RSI: 0000200000000480 RDI: 0000000000000000
RBP: 00007f1914013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f19141e6038 R14: 00007f19141e5fa0 R15: 00007ffc8f3dc7f8
 </TASK>
rcu: rcu_preempt kthread starved for 10562 jiffies! g21061 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:27096 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5253 [inline]
 __schedule+0x17b2/0x4d40 kernel/sched/core.c:6861
 __schedule_loop kernel/sched/core.c:6943 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6958
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x52d/0xa60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: ce 11 ca f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 63 14 22 00 f3 0f 1e fa fb f4 <e9> a3 11 ca f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 104d70b5e2a84500 RBX: ffffffff819729e7 RCX: 104d70b5e2a84500
RDX: 0000000000000001 RSI: ffffffff8d762d2a RDI: ffffffff8bbfa900
RBP: ffffc90000197f10 R08: ffff8880b893341b R09: 1ffff11017126683
R10: dffffc0000000000 R11: ffffed1017126684 R12: ffffffff8f801370
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110038d9b70
FS:  0000000000000000(0000) GS:ffff8881261c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000008aede000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:190 [inline]
 do_idle+0x1e7/0x510 kernel/sched/idle.c:330
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>