rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10218/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=85625, q=761 ncpus=2)
task:syz.5.1177      state:R  running task     stack:24672 pid:10218 tgid:10218 ppid:9950   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__page_table_check_zero+0x118/0x350 mm/page_table_check.c:153
Code: 18 49 ff c7 83 7c 24 04 3f 0f 87 e6 00 00 00 e8 2e 47 8c ff 4c 89 fd 44 89 f1 48 d3 ed 31 ff 48 89 ee e8 fb 4b 8c ff 48 85 ed <0f> 85 e3 00 00 00 4d 85 e4 0f 84 37 01 00 00 48 8b 2d 52 69 9f 0c
RSP: 0018:ffffc9000353f460 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88802c3cbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff82074595 R09: 1ffff11003da6173
R10: dffffc0000000000 R11: ffffed1003da6174 R12: ffff88801ed30ba0
R13: 1ffffffff347515c R14: 0000000000000003 R15: 0000000000000002
 page_table_check_free include/linux/page_table_check.h:41 [inline]
 free_pages_prepare mm/page_alloc.c:1095 [inline]
 free_unref_page+0xd36/0xea0 mm/page_alloc.c:2612
 discard_slab mm/slub.c:2583 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:3051
 put_cpu_partial+0x17c/0x250 mm/slub.c:3126
 __slab_free+0x2ea/0x3d0 mm/slub.c:4343
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:378
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __kmalloc_cache_node_noprof+0x1d3/0x300 mm/slub.c:4201
 kmalloc_node_noprof include/linux/slab.h:704 [inline]
 __get_vm_area_node+0x113/0x270 mm/vmalloc.c:3109
 __vmalloc_node_range_noprof+0x3c6/0x1400 mm/vmalloc.c:3794
 alloc_thread_stack_node kernel/fork.c:313 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1113
 copy_process+0x5d1/0x3dc0 kernel/fork.c:2204
 kernel_clone+0x226/0x8f0 kernel/fork.c:2781
 __do_sys_clone3 kernel/fork.c:3085 [inline]
 __se_sys_clone3+0x2cb/0x350 kernel/fork.c:3064
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f522c9adee9
RSP: 002b:00007ffe195f2858 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f522c930840 RCX: 00007f522c9adee9
RDX: 00007f522c930840 RSI: 0000000000000058 RDI: 00007ffe195f28a0
RBP: 00007f522d6fb6c0 R08: 00007f522d6fb6c0 R09: 00007ffe195f2987
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007ffe195f28a0 R15: 00007ffe195f2988
 </TASK>