rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P26283/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=198861, q=8356 ncpus=1)
task:syz.8.5203      state:R  running task     stack:26888 pid:26283 tgid:26278 ppid:24034  task_flags:0x40054c flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x40
 _raw_spin_unlock+0x3f/0x50
 __zap_vma_range+0x40e3/0x4f70
 unmap_vmas+0x390/0x550
 exit_mmap+0x293/0x9f0
 __mmput+0x118/0x420
 exit_mm+0x221/0x2d0
 do_exit+0x6cd/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5aa099e0d9
RSP: 002b:00007f5a9ebf60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f5aa0c26098 RCX: 00007f5aa099e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f5aa0c2609c
RBP: 00007f5aa0c26090 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5aa0c26128 R14: 00007ffd7c6e89d0 R15: 00007ffd7c6e8ab8
 </TASK>
