exit
[ 5492.798303] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 5492.798653] rcu: 	2-....: (4858441 ticks this GP) idle=3b8c/1/0x4000000000000000 softirq=84809/84809 fqs=1093111
[ 5492.799235] rcu: 	(t=4863214 jiffies g=162497 q=3544 ncpus=4)
[ 5492.799567] CPU: 2 PID: 15661 Comm: (udev-worker) Tainted: G      D W          6.8.0-rc2-virtme #1
[ 5492.800080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 5492.800732] RIP: 0010:down_read_trylock+0x1f/0x140
[ 5492.801017] Code: 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 53 48 89 fb 48 83 ec 08 8b 0d bd f8 ad 01 85 c9 75 0d 48 8b 4f 68 <48> 39 cf 0f 85 9c 00 00 00 65 ff 05 d9 45 27 75 48 b9 07 00 00 00
[ 5492.802082] RSP: 0000:ffffad3040233e70 EFLAGS: 00000246
[ 5492.802384] RAX: 0000000000000008 RBX: ffff99214654eb48 RCX: ffff99214654eb48
[ 5492.802796] RDX: 0000000000000007 RSI: 000000000000000c RDI: ffff99214654eb48
[ 5492.803207] RBP: ffffffff8afbbab3 R08: 0000000000000000 R09: 0000000000000000
[ 5492.803620] R10: 0000000000000000 R11: 0000000000000000 R12: ffff992144cc02a0
[ 5492.804030] R13: 00007f276e95de40 R14: ffff992143e79100 R15: 0000000000000000
[ 5492.804444] FS:  00007f276dd2db40(0000) GS:ffff99217ed00000(0000) knlGS:0000000000000000
[ 5492.804909] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5492.805241] CR2: 00007f276e95de16 CR3: 0000000004b60001 CR4: 0000000000770ef0
[ 5492.805654] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5492.806067] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5492.806478] PKRU: 55555554
[ 5492.806638] Call Trace:
[ 5492.806786]  <IRQ>
[ 5492.806913]  ? rcu_dump_cpu_stacks+0xfa/0x180
[ 5492.807172]  ? rcu_sched_clock_irq+0x7bb/0x13d0
[ 5492.807437]  ? cpuacct_charge+0x3e/0x120
[ 5492.807670]  ? lock_release+0x1d3/0x270
[ 5492.807898]  ? lock_acquire+0x179/0x2b0
[ 5492.808124]  ? cpuacct_account_field+0x23/0xf0
[ 5492.808387]  ? update_process_times+0x5f/0x90
[ 5492.808639]  ? __pfx_tick_nohz_highres_handler+0x10/0x10
[ 5492.808948]  ? tick_sched_handle+0x33/0x50
[ 5492.809188]  ? tick_nohz_highres_handler+0x71/0x90
[ 5492.809471]  ? __hrtimer_run_queues+0x86/0x390
[ 5492.809734]  ? hrtimer_interrupt+0x100/0x240
[ 5492.809985]  ? __sysvec_apic_timer_interrupt+0x66/0x1a0
[ 5492.810291]  ? sysvec_apic_timer_interrupt+0x73/0x90
[ 5492.810585]  </IRQ>
[ 5492.810712]  <TASK>
[ 5492.810843]  ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 5492.811152]  ? lock_vma_under_rcu+0xb3/0x4a0
[ 5492.811406]  ? down_read_trylock+0x1f/0x140
[ 5492.811662]  lock_vma_under_rcu+0xdb/0x4a0
[ 5492.811902]  ? __pfx_vm_area_free_rcu_cb+0xf/0x10
[ 5492.812179]  do_user_addr_fault+0x138/0x830
[ 5492.812425]  exc_page_fault+0x6e/0x1d0
[ 5492.812645]  asm_exc_page_fault+0x26/0x30
[ 5492.812883] RIP: 0033:0x7f276e95de40
[ 5492.813099] Code: Unable to access opcode bytes at 0x7f276e95de16.
[ 5492.813453] RSP: 002b:00007ffdeae142b8 EFLAGS: 00010202
[ 5492.813752] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00005642dfac084b
[ 5492.814161] RDX: 00005647bbd7b530 RSI: 00005647bbd76010 RDI: 00005647bbd7b1c8
[ 5492.814567] RBP: 00005647bbd7b1c0 R08: 00005647bbd7b180 R09: 0000000000000000
[ 5492.814979] R10: 0000000000000010 R11: 39adf3194266c265 R12: 00007ffdeae14380
[ 5492.815387] R13: 00005647bbd772b0 R14: 00005647bbdc3240 R15: 0000000000000000
[ 5492.815801]  </TASK>