rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P25253/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=195969, q=1865 ncpus=2)
task:syz.9.5188      state:R  running task     stack:24280 pid:25253 tgid:25250 ppid:20107  task_flags:0x40054c flags:0x10080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5260 [inline]
 __schedule+0x149b/0x4fd0 kernel/sched/core.c:6867
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7194
 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x18e3/0x23d0 arch/x86/kernel/unwind_orc.c:679
Code: 49 0f bf 04 24 48 01 c6 4c 89 f7 48 89 da e8 84 0d 00 00 84 c0 0f 84 47 01 00 00 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 20 <0f> b6 04 28 84 c0 0f 85 17 08 00 00 b3 01 8b 84 24 8c 00 00 00 41
RSP: 0018:ffffc9000525f538 EFLAGS: 00000202
RAX: 1ffff92000a4bec1 RBX: ffffffff90247e56 RCX: 0000000000000001
RDX: ffffc9000525f648 RSI: dffffc0000000000 RDI: ffffc9000525f8a8
RBP: dffffc0000000000 R08: ffffc9000525f8a8 R09: 0000000000000000
R10: ffffc9000525f658 R11: fffff52000a4becd R12: ffffc9000525f658
R13: 1ffff92000a4bec3 R14: ffffc9000525f608 R15: 1ffffffff2048fcb
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 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:1433 [inline]
 __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2973
 vfree+0x25a/0x400 mm/vmalloc.c:3466
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x694/0x22f0 kernel/exit.c:971
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4e0 kernel/entry/common.c:75
 __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_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 __do_fast_syscall_32+0x398/0x570 arch/x86/entry/syscall_32.c:310
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf709d539
RSP: 002b:00000000f544b60c EFLAGS: 00000206 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 00000000f74650b8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f74650bc
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>