rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19485/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=73961, q=9068 ncpus=2)
task:syz.0.5903      state:R  running task     stack:24904 pid:19485 tgid:19485 ppid:5597   task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 preempt_schedule_common+0x7f/0xd0
 preempt_schedule_thunk+0x16/0x40
 _raw_spin_unlock+0x41/0x50
 __zap_vma_range+0x4082/0x4f20
 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+0x10e/0x770
 do_syscall_64+0x328/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2dd659e0d9
RSP: 002b:00007ffe0bb39fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f2dd6827da0 RCX: 00007f2dd659e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f2dd6827da0 R08: 00007f2dd6826038 R09: 0000000000000000
R10: 00000000003f8b90 R11: 0000000000000246 R12: 0000000000073e7b
R13: 00007f2dd682609c R14: 0000000000073c24 R15: 00007ffe0bb3a0b0
 </TASK>
