rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7997/1:b..l..
rcu: 	(detected by 0, t=10508 jiffies, g=212353, q=75528 ncpus=2)
task:syz.5.8772      state:R  running task     stack:25096 pid:7997  tgid:7997  ppid:7041   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5584 [inline]
 __schedule+0x1828/0x58c0 kernel/sched/core.c:7389
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7669
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 50 3c 62 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 f2 55 3d 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 0f 50 65 0a cc 48 8d 3d f7 10 1d
RSP: 0018:ffffc900042a6a00 EFLAGS: 00000296
RAX: 4d523395a2b3d000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000007bfd619f RSI: ffffffff8e93431f RDI: ffffffff8c8e9880
RBP: ffff888064559f40 R08: ffffffff817889cf R09: 0000000000000000
R10: ffffc900042a6b38 R11: ffffffff81b3b320 R12: ffffffff9015a260
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1402 [inline]
 __free_frozen_pages+0xd1a/0xe10 mm/page_alloc.c:2958
 __slab_free+0x269/0x2c0 mm/slub.c:5926
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4720 [inline]
 slab_alloc_node mm/slub.c:5033 [inline]
 kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047
 mt_alloc_one lib/maple_tree.c:139 [inline]
 mas_alloc_nodes+0x291/0x350 lib/maple_tree.c:1049
 mas_preallocate+0x42a/0x840 lib/maple_tree.c:5016
 vma_iter_prealloc mm/vma.h:698 [inline]
 __split_vma+0x414/0x8a0 mm/vma.c:562
 vms_gather_munmap_vmas+0x4e3/0x1370 mm/vma.c:1545
 __mmap_setup mm/vma.c:2591 [inline]
 __mmap_region mm/vma.c:3071 [inline]
 mmap_region+0x90d/0x2800 mm/vma.c:3173
 do_mmap+0xe0a/0x1300 mm/mmap.c:573
 vm_mmap_pgoff+0x27a/0x520 mm/util.c:581
 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x16a/0x530 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef903a9242
RSP: 002b:00007ffe3b6e5e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fef8e1f6000 RCX: 00007fef903a9242
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007fef8e1f6000
RBP: 0000000000000011 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000003 R14: 0000000000000000 R15: 00007fef90625fa0
 </TASK>