rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P16812/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=157921, q=1044 ncpus=1)
task:syz-executor    state:R  running task     stack:22688 pid:16812 tgid:16812 ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_release+0x7f/0x3c0 kernel/locking/lockdep.c:5881
Code: d6 74 b4 0e 00 0f 84 1c 02 00 00 65 8b 05 79 7d c9 11 85 c0 0f 85 0d 02 00 00 65 4c 8b 3d 81 38 c9 11 41 83 bf 9c 0b 00 00 00 <0f> 85 f7 01 00 00 49 81 3e 20 e5 2f 94 0f 84 ea 01 00 00 9c 5b fa
RSP: 0018:ffffc900043bf4b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900043bf5d8 RCX: 0000000080000001
RDX: ffffc900043bf601 RSI: ffffffff8c4bb860 RDI: ffffffff8c4bb820
RBP: 1ffffffff21df501 R08: ffffc900043bfaf0 R09: ffffc900043bf618
R10: dffffc0000000000 R11: fffff52000877ec5 R12: ffffc900043b8000
R13: ffffffff8177827f R14: ffffffff8eb59c60 R15: ffff888033dfdd00
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1183 [inline]
 unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
 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:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1406 [inline]
 free_pages_prepare+0x960/0xa60 mm/page_alloc.c:1451
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:6897
 __free_contig_range mm/page_alloc.c:6942 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5257
 vm_area_free_pages mm/vmalloc.c:3439 [inline]
 vfree+0x224/0x4a0 mm/vmalloc.c:3488
 kcov_put kernel/kcov.c:449 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:554
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:1009
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
 get_signal+0x121b/0x12c0 kernel/signal.c:3046
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc7e35e90e
RSP: 002b:00007ffeb411ab78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 000000000000002c RBX: 0000555576b13500 RCX: 00007fbc7e35e90e
RDX: 000000000000002c RSI: 00007fbc7f154670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffeb411abf4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fbc7f154670 R15: 0000000000000000
 </TASK>