rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=207133, q=1816 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295048804-4295038302), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g207133 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27536 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31815 Comm: syz.5.6090 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xf2/0x150
Code: c5 0f 94 c3 eb 05 bb 01 00 00 00 48 c7 c7 b8 c3 21 8e e8 31 19 00 00 b8 ff ff ff ff 65 0f c1 05 74 1d 91 07 83 f8 01 75 25 9c <58> a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 5b 41
RSP: 0000:ffffc900000079a8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080010102
RDX: ffff88816ab88000 RSI: ffffffff8e21c3b8 RDI: ffffffff8c28b6e0
RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f2c R12: 0000000000000046
R13: ffff88816ab88000 R14: ffff88810c6b82c0 R15: 0000000000000004
FS:  0000555563fa0500(0000) GS:ffff88818dc91000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000057eff8 CR3: 0000000169d3e000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 advance_sched+0x1c6/0xc20
 __hrtimer_run_queues+0x3c0/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x2e/0x70
Code: 48 8b 04 24 65 48 8b 0d 98 4b 73 11 65 8b 15 b9 4b 73 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 cc 16 00 00 00 <74> 2c 8b 91 a8 16 00 00 83 fa 02 75 21 48 8b 91 b0 16 00 00 48 8b
RSP: 0000:ffffc90000007d90 EFLAGS: 00000246
RAX: ffffffff89b78107 RBX: ffffffff89b78016 RCX: ffff88816ab88000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff89b78016 R09: ffffffff8e95cda0
R10: 0000000000000001 R11: ffffffff89b77ff0 R12: ffff88810c6b8080
R13: dffffc0000000000 R14: ffff88810c6b8000 R15: ffff8881134e9000
 taprio_dequeue+0x117/0x540
 __qdisc_run+0x23f/0x1560
 net_tx_action+0x806/0xc30
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:get_page_from_freelist+0x183/0x2540
Code: 0b 0f 9d c0 0f 93 c1 44 89 ef 83 e7 03 48 89 bc 24 90 01 00 00 41 f7 c5 00 02 00 00 40 0f 94 c7 45 84 ed 41 0f 99 c0 45 89 e9 <41> 81 e1 00 01 00 00 41 ba 09 00 00 00 44 0f 44 d3 83 fb 09 44 0f
RSP: 0000:ffffc90004637768 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000901 RSI: dffffc0000000000 RDI: 0000000000000001
RBP: ffffc90004637a30 R08: ffffffff8222d501 R09: 0000000000000901
R10: ffffc90004637980 R11: 0000000000000000 R12: ffffc90004637980
R13: 0000000000000901 R14: ffffc9000463799c R15: ffffc90004637988
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x235/0x490
 alloc_pages_noprof+0xac/0x2a0
 pte_alloc_one+0x22/0x370
 __pte_alloc+0x25/0x1a0
 do_pte_missing+0x2cd0/0x33e0
 handle_mm_fault+0x1bd7/0x3170
 do_user_addr_fault+0xa73/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f49a6a66427
Code: 48 85 c0 74 1b 48 83 f8 01 0f 85 bf 03 00 00 0f b7 44 24 10 66 c1 c0 08 0f b7 c0 48 89 44 24 10 48 8b 44 24 18 0f b7 74 24 10 <66> 89 30 e9 18 ff ff ff 48 83 7c 24 08 17 0f 85 20 03 00 00 64 f0
RSP: 002b:00007fffd8e8cad0 EFLAGS: 00010246
RAX: 000020000057eff8 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 3e9cb2707544b9dd RSI: 0000000000000000 RDI: 0000555563fa03d8
RBP: 00007fffd8e8cbf0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007fffd8e8cc30
R13: 00007f49a6e1618c R14: 00000000000f6f98 R15: 00007f49a6e16180
 </TASK>
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
