rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10198/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=36957, q=1727 ncpus=2)
task:syz.5.1057      state:R  running task     stack:25144 pid:10198 tgid:10195 ppid:7512   task_flags:0x40054c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x1023/0x6000 kernel/sched/core.c:6907
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7234
 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x524/0x1ea0 arch/x86/kernel/unwind_orc.c:527
Code: fe ff ff 4c 8d 41 04 4c 89 fe 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ee 03 48 c1 ea 03 0f b6 14 02 0f b6 04 06 4c 89 c6 <83> e6 07 40 38 f2 40 0f 9e c6 84 d2 0f 95 c2 40 84 d6 0f 85 36 13
RSP: 0018:ffffc9000529f618 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff917506a2
RDX: 0000000000000000 RSI: ffffffff917506a6 RDI: ffffffff90ef4b88
RBP: ffffc9000529f720 R08: ffffffff917506a6 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000000ae0b R12: ffffc9000529f728
R13: ffffc9000529f6d8 R14: ffffc9000529f70d R15: ffffffff917506a7
 __unwind_start+0x3d1/0x7f0 arch/x86/kernel/unwind_orc.c:773
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 save_stack+0x162/0x1e0 mm/page_owner.c:165
 __reset_page_owner+0x84/0x190 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1433 [inline]
 __free_frozen_pages+0x822/0x1130 mm/page_alloc.c:2973
 vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3466
 vfree+0x55/0x80 mm/vmalloc.c:3443
 kcov_put kernel/kcov.c:442 [inline]
 kcov_put kernel/kcov.c:438 [inline]
 kcov_close+0x34/0x60 kernel/kcov.c:543
 __fput+0x3ff/0xb40 fs/file_table.c:469
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x829/0x2a30 kernel/exit.c:971
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4071b9bf79
RSP: 002b:00007f406fdd5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000020 RBX: 00007f4071e16180 RCX: 00007f4071b9bf79
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000006
RBP: 00007f4071c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4071e16218 R14: 00007f4071e16180 R15: 00007ffce8d615c8
 </TASK>