rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P24505/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=277229, q=4578 ncpus=2)
task:syz.4.18823     state:R  running task     stack:25640 pid:24505 tgid:24505 ppid:11820  task_flags:0x40044c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 preempt_schedule_irq+0x4b/0x90
 irqentry_exit+0x14f/0x910
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x12/0x350
Code: cc cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 60 <4d> 89 ce 45 89 c7 41 89 cc 89 54 24 04 89 f3 49 89 fd 48 8b ac 24
RSP: 0018:ffffc90004dbf428 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffffffff81779b8d RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8eb5a1e0
RBP: 1ffff920009b7ec0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90004dbf5c8 R11: fffff520009b7ec5 R12: dffffc0000000000
R13: ffffffff8177710f R14: ffffc90004dbf5c8 R15: 1ffff920009b7eb9
 unwind_next_frame+0xac/0x2550
 __unwind_start+0x514/0x660
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_pages_prepare+0x960/0xa60
 __free_contig_range_common+0x174/0x340
 free_pages_bulk+0x48/0x120
 vfree+0x226/0x4a0
 kcov_close+0x28/0x50
 __fput+0x418/0xa50
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x10e/0x770
 do_syscall_64+0x328/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f254af9eec9
RSP: 002b:00007ffcf4eb2468 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: 0000000000000e02 RBX: 00007f254af5a460 RCX: 00007f254af9eec9
RDX: 00007f254af5a460 RSI: 0000000000000058 RDI: 00007ffcf4eb24c0
RBP: 00007f254bd916c0 R08: 00007f254bd916c0 R09: 00007ffcf4eb25a7
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffe8
R13: 000000000000000b R14: 00007ffcf4eb24c0 R15: 00007ffcf4eb25a8
 </TASK>
