rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6056/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=300737, q=6749 ncpus=2)
task:syz.0.8335      state:R  running task     stack:25152 pid:6056  tgid:6056  ppid:5688   task_flags:0x40044c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x4de/0x23c0
Code: 24 50 48 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 4c 8b 6c 24 48 0f 84 72 15 00 00 e9 03 02 00 00 49 89 d5 48 89 d5 48 89 d8 <48> 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4c
RSP: 0018:ffffc90003a17558 EFLAGS: 00000283
RAX: ffffffff902a83a0 RBX: ffffffff902a83a0 RCX: 0000000080000000
RDX: ffffffff902a8398 RSI: ffffffff90a6dfae RDI: ffffffff8c27c4a0
RBP: ffffffff902a8398 R08: 0000000000000003 R09: ffffffff8e75e5e0
R10: ffffc90003a17678 R11: ffffffff81b0c390 R12: ffffffff81876f3a
R13: ffffffff902a8398 R14: ffffc90003a17628 R15: 000000000000876f
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xc2b/0xdb0
 vfree+0x25a/0x400
 kcov_close+0x28/0x50
 __fput+0x44f/0xa70
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x23c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff28fb9ce59
RSP: 002b:00007ffcf8c47c38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00000000001a104a RCX: 00007ff28fb9ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff28fe1609c
RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007ffcf8c47d40 R11: 0000000000000246 R12: 00007ffcf8c47d60
R13: 00007ff28fe1609c R14: 00000000001a107c R15: 00007ffcf8c47d40
 </TASK>
