rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=f01c/1/0x4000000000000000 softirq=34914/34914 fqs=0
rcu: 	(t=10500 jiffies g=27609 q=1296 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g27609 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=12821
rcu: rcu_preempt kthread starved for 10500 jiffies! g27609 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27288 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 0 UID: 0 PID: 8355 Comm: syz.4.499 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:lock_is_held_type+0x137/0x190
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 09 9a 42 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900078e61e8 EFLAGS: 00000206
RAX: 838a4f64448d3700 RBX: 0000000000000001 RCX: 838a4f64448d3700
RDX: ffff88810aaeba00 RSI: ffffffff8dd8dcaa RDI: ffffffff8c03da60
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff8b2892be
R10: dffffc0000000000 R11: fffffbfff1f86aef R12: 0000000000000246
R13: ffff88810aaeba00 R14: ffffffff8e33d320 R15: 0000000000000003
FS:  00007f07202306c0(0000) GS:ffff8880b83fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07201edfc8 CR3: 000000002df4e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 net_generic+0x101/0x240
 tipc_sk_lookup+0xa6/0x920
 tipc_sk_rcv+0x3f9/0x2c30
 tipc_node_xmit+0x1c9/0xe90
 tipc_node_xmit_skb+0xf4/0x150
 tipc_sk_rcv+0x2a4e/0x2c30
 tipc_node_xmit+0x1c9/0xe90
 tipc_sk_filter_rcv+0x1cc6/0x31f0
 tipc_sk_rcv+0x8a2/0x2c30
 tipc_node_xmit+0x1c9/0xe90
 tipc_node_distr_xmit+0x2a0/0x3b0
 tipc_sk_backlog_rcv+0x1a1/0x230
 __release_sock+0x297/0x3a0
 release_sock+0x5f/0x1f0
 tipc_release+0x1712/0x2190
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 get_signal+0x11ec/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: 0033:0x7f071f38ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0720230038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007f071f5d5fa0 RCX: 00007f071f38ec29
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007f071f411e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f071f5d6038 R14: 00007f071f5d5fa0 R15: 00007ffe9bc1b988
 </TASK>
vkms_vblank_simulate: vblank timer overrun
