rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P16301/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=91837, q=8841 ncpus=2)
task:syz.1.2148      state:R  running task     stack:26088 pid:16301 tgid:16300 ppid:13749  task_flags:0x40054c flags:0x00080001
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_reschedule_ipi+0x1a/0x20
RIP: 0010:unwind_next_frame+0x2b4/0x2390
Code: 00 00 fc ff df 0f 84 03 02 00 00 4a 8d 14 ad 48 75 d1 8f 45 29 e8 4a 8d 1c 82 48 83 c3 fc 49 89 d5 48 39 da 0f 86 1c 10 00 00 <49> 29 d5 e9 80 00 00 00 31 db e9 eb 16 00 00 49 81 fc 00 80 2a 91
RSP: 0018:ffffc90021ec7598 EFLAGS: 00000202
RAX: ffffffff8fd7db5c RBX: ffffffff8fd7db60 RCX: ffffffff8fd7db64
RDX: ffffffff8fd7db60 RSI: ffffffff90543ca4 RDI: ffffffff8c03da00
RBP: ffffffff8fd7db64 R08: 0000000000000001 R09: ffffffff81742d25
R10: ffffc90021ec76b8 R11: ffffffff81acd510 R12: ffffffff8184e4ab
R13: ffffffff8fd7db60 R14: ffffc90021ec7668 R15: ffffffff8fd7db60
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x19a/0x6d0
 put_files_struct+0x2b3/0x350
 do_exit+0x66f/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1285/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 exit_to_user_mode_loop+0x72/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f12b8ec29
RSP: 002b:00007f5f10df6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000cb
RAX: 0000000000000000 RBX: 00007f5f12dd5fa0 RCX: 00007f5f12b8ec29
RDX: 0000200000000280 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 00007f5f12c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f12dd6038 R14: 00007f5f12dd5fa0 R15: 00007ffe93143d78
 </TASK>
