vkms_vblank_simulate: vblank timer overrun
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4453/1:b..l
	(detected by 1, t=10502 jiffies, g=25933, q=177 ncpus=2)
task:udevd           state:R  running task     stack:23632 pid:4453  ppid:3639   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6875
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:seqcount_lockdep_reader_access+0x195/0x1d0 include/linux/seqlock.h:105
Code: ff 4d 85 ed 75 16 e8 5a 92 92 ff eb 15 e8 53 92 92 ff e8 be 98 41 08 4d 85 ed 74 ea e8 44 92 92 ff fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 43 c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90004ba7760 EFLAGS: 00000293
RAX: ffffffff81efaf4c RBX: 0000000000000000 RCX: ffff888025738000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004ba7808 R08: ffffffff90b132e7 R09: 1ffffffff216265c
R10: dffffc0000000000 R11: fffffbfff216265d R12: dffffc0000000000
R13: 0000000000000200 R14: ffffffff81ef87fe R15: 1ffff92000974eec
 read_seqbegin include/linux/seqlock.h:893 [inline]
 read_seqbegin_or_lock include/linux/seqlock.h:1187 [inline]
 prepend_path+0xee/0xbe0 fs/d_path.c:165
 d_absolute_path+0x9e/0x140 fs/d_path.c:233
 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
 tomoyo_realpath_from_path+0x2c0/0x5c0 security/tomoyo/realpath.c:271
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path2_perm+0x2aa/0x880 security/tomoyo/file.c:922
 tomoyo_path_rename+0x14b/0x1a0 security/tomoyo/tomoyo.c:287
 security_path_rename+0x168/0x200 security/security.c:1221
 do_renameat2+0x691/0xc80 fs/namei.c:5065
 __do_sys_rename fs/namei.c:5124 [inline]
 __se_sys_rename fs/namei.c:5122 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5122
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f960067acc7
RSP: 002b:00007fff70c5e5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00005560a0593090 RCX: 00007f960067acc7
RDX: 00005560a055d010 RSI: 00007fff70c5e5f0 RDI: 00007fff70c5e9f0
RBP: 00005560a057cc50 R08: 00000000000001e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff70c5e5f0
R13: 00007fff70c5e9f0 R14: 0000000000000000 R15: 00005560a057b440
 </TASK>
vkms_vblank_simulate: vblank timer overrun