rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8486/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=23989, q=1399657 ncpus=2)
task:syz-executor    state:R  running task     stack:26112 pid:8486  tgid:8486  ppid:5207   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0xef5/0x5750 kernel/sched/core.c:6682
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7004
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:sized_strscpy+0x10d/0x290 lib/string.c:172
Code: ff df 48 c1 eb 07 4c 21 c3 80 3c 0e 00 0f 85 6f 01 00 00 f3 48 0f bc c0 48 c1 e8 03 48 89 1f 4c 01 f8 48 83 c4 10 5b 5d 41 5c <41> 5d 41 5e 41 5f c3 cc cc cc cc 48 89 f2 b8 00 10 00 00 81 e2 ff
RSP: 0018:ffffc900112e7420 EFLAGS: 00000282
RAX: 000000000000000c RBX: ffff88801f999088 RCX: ffffffff8b12d5fe
RDX: ffffed1005d16117 RSI: 0000000000000000 RDI: ffff88801f999094
RBP: 000000000000000d R08: 0000000000000004 R09: ffffed1005d16116
R10: ffff88802e8b08b0 R11: 0000000000000000 R12: ffff88801f999060
R13: dffffc0000000000 R14: ffff88801f999088 R15: 0000000000000008
 sized_strscpy include/linux/fortify-string.h:329 [inline]
 __update_page_owner_handle+0x256/0x320 mm/page_owner.c:251
 __set_page_owner+0x13f/0x560 mm/page_owner.c:325
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
 get_free_pages_noprof+0xc/0x40 mm/page_alloc.c:4780
 kasan_populate_vmalloc_pte+0x2d/0x160 mm/kasan/shadow.c:304
 apply_to_pte_range mm/memory.c:2817 [inline]
 apply_to_pmd_range mm/memory.c:2861 [inline]
 apply_to_pud_range mm/memory.c:2897 [inline]
 apply_to_p4d_range mm/memory.c:2933 [inline]
 __apply_to_page_range+0x5fd/0xd30 mm/memory.c:2967
 alloc_vmap_area+0x93e/0x2a70 mm/vmalloc.c:2035
 __get_vm_area_node+0x17e/0x2d0 mm/vmalloc.c:3116
 __vmalloc_node_range_noprof+0x26a/0x15a0 mm/vmalloc.c:3788
 vmalloc_user_noprof+0x6b/0x90 mm/vmalloc.c:3982
 kcov_ioctl+0x4c/0x730 kernel/kcov.c:716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a6e77dbfb
RSP: 002b:00007ffeaeab1620 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007f8a6e77dbfb
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000d8
RBP: 00007f8a6e936018 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 2768 jiffies! g23989 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:27968 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0xef5/0x5750 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6774
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111