rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8706/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=33145, q=909822 ncpus=2)
task:syz.4.629       state:R  running task     stack:26904 pid:8706  tgid:8683  ppid:5833   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x1585/0x5340 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:850 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
RIP: 0010:unwind_next_frame+0xb8/0x23c0 arch/x86/kernel/unwind_orc.c:495
Code: 00 00 00 4c 89 bc 24 90 00 00 00 e8 c2 e2 34 00 4c 8d 3d 00 00 00 00 48 c7 c7 e0 02 76 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 <45> 31 c9 41 57 e8 3e 03 2b 00 48 83 c4 08 e8 95 4d 39 0a 85 c0 74
RSP: 0018:ffffc90004e7f078 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffffff8176b337 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e7602e0
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90004e7f1a8 R11: fffff520009cfe41 R12: 1ffff920009cfe35
R13: ffffc90004e7f1e0 R14: ffffc90004e7f1a8 R15: ffffffff81768a45
 __unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:773
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2485
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2504
 shmem_alloc_folio mm/shmem.c:1930 [inline]
 shmem_alloc_and_add_folio+0x445/0xf80 mm/shmem.c:1972
 shmem_get_folio_gfp+0x5a9/0x1670 mm/shmem.c:2567
 shmem_get_folio mm/shmem.c:2673 [inline]
 shmem_write_begin+0x16c/0x330 mm/shmem.c:3327
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4319
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3502
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1dfd75cece
RSP: 002b:00007f1dfe576da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1dfe5776c0 RCX: 00007f1dfd75cece
RDX: 00000000013bd7ef RSI: 00007f1df3400000 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007f1dfe576ee0 R14: 00007f1dfe576ea0 R15: 00007f1df3400000
 </TASK>