GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=f9fc/1/0x4000000000000000 softirq=42090/42090 fqs=1
rcu: 	(detected by 0, t=10502 jiffies, g=48013, q=238 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: kauditd 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_acquire+0x132/0x350
Code: b0 00 00 00 ff 74 24 30 e8 db 02 00 00 48 83 c4 30 48 c7 c7 d3 5c 4b 8e e8 7b 65 2e 0a b8 ff ff ff ff 65 0f c1 05 3e 17 cb 11 <83> f8 01 0f 85 af 00 00 00 9c 58 a9 00 02 00 00 0f 85 c2 00 00 00
RSP: 0018:ffffc90000a08cb8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000010003
RDX: 00000000affc76cc RSI: ffffffff8e4b5cd3 RDI: ffffffff8c4c0680
RBP: ffff888161a93c00 R08: cb00000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff9aa03c88 R12: ffffffff9aa03c88
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff8882a8f49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff711a54ff8 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0x40/0x60
 debug_object_deactivate+0x9a/0x250
 __hrtimer_run_queues+0x239/0xa10
 hrtimer_interrupt+0x448/0x910
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:console_flush_all+0x7d2/0xaf0
Code: ff ff e8 01 2a 21 00 90 0f 0b 90 e9 9c fc ff ff e8 f3 29 21 00 e8 ce 23 2b 0a 48 85 db 74 c0 e8 e4 29 21 00 fb 48 8b 5c 24 18 <48> 8b 44 24 28 42 80 3c 20 00 4d 8d 77 58 74 08 4c 89 f7 e8 36 26
RSP: 0018:ffffc90000aa7880 EFLAGS: 00000293
RAX: ffffffff81a5c15c RBX: ffffc90000aa79e0 RCX: ffff888161a93c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000aa7990 R08: ffffffff9057c337 R09: 1ffffffff20af866
R10: dffffc0000000000 R11: fffffbfff20af867 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8f478460
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 _printk+0xdd/0x130
 kauditd_hold_skb+0x1c8/0x210
 kauditd_send_queue+0x295/0x2e0
 kauditd_thread+0x7ef/0xa90
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g48013 f0x0 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:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 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:
CPU: 0 UID: 0 PID: 11064 Comm: syz.0.2318 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:smp_call_function_many_cond+0x11e6/0x15f0
Code: c0 75 7a 41 8b 1e 89 de 83 e6 01 31 ff e8 42 21 0c 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 ee 1c 0c 00 eb 37 f3 90 <41> 0f b6 04 1c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 d3 1c 0c
RSP: 0018:ffffc9000378f440 EFLAGS: 00000293
RAX: ffffffff81bace6d RBX: dffffc0000000000 RCX: ffff88810b848000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000378f588 R08: ffffffff9057c337 R09: 1ffffffff20af866
R10: dffffc0000000000 R11: fffffbfff20af867 R12: 1ffff110478c81d1
R13: ffff88812103c448 R14: ffff88823c640e88 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818d949000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34621ff8 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x5c4/0x1090
 tlb_flush_mmu+0x1af/0xa30
 tlb_finish_mmu+0xf4/0x220
 free_ldt_pgtables+0x192/0x360
 exit_mmap+0x1bf/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+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff710b9e0d9
Code: Unable to access opcode bytes at 0x7ff710b9e0af.
RSP: 002b:00007ff711a550e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff710e25fa8 RCX: 00007ff710b9e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff710e25fac
RBP: 00007ff710e25fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff710e26038 R14: 00007ffd83b88db0 R15: 00007ffd83b88e98
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.0.2318:11064]
Modules linked in:
irq event stamp: 1069844
hardirqs last  enabled at (1069843): [<ffffffff8bd0ee38>] irqentry_exit+0x218/0x8f0
hardirqs last disabled at (1069844): [<ffffffff8bd0dbce>] sysvec_apic_timer_interrupt+0xe/0xc0
softirqs last  enabled at (1069834): [<ffffffff818874da>] __irq_exit_rcu+0xca/0x220
softirqs last disabled at (1069729): [<ffffffff818874da>] __irq_exit_rcu+0xca/0x220
CPU: 0 UID: 0 PID: 11064 Comm: syz.0.2318 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:smp_call_function_many_cond+0x11e6/0x15f0
Code: c0 75 7a 41 8b 1e 89 de 83 e6 01 31 ff e8 42 21 0c 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 ee 1c 0c 00 eb 37 f3 90 <41> 0f b6 04 1c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 d3 1c 0c
RSP: 0018:ffffc9000378f440 EFLAGS: 00000293
RAX: ffffffff81bace6d RBX: dffffc0000000000 RCX: ffff88810b848000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000378f588 R08: ffffffff9057c337 R09: 1ffffffff20af866
R10: dffffc0000000000 R11: fffffbfff20af867 R12: 1ffff110478c81d1
R13: ffff88812103c448 R14: ffff88823c640e88 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818d949000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34621ff8 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x5c4/0x1090
 tlb_flush_mmu+0x1af/0xa30
 tlb_finish_mmu+0xf4/0x220
 free_ldt_pgtables+0x192/0x360
 exit_mmap+0x1bf/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+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff710b9e0d9
Code: Unable to access opcode bytes at 0x7ff710b9e0af.
RSP: 002b:00007ff711a550e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff710e25fa8 RCX: 00007ff710b9e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff710e25fac
RBP: 00007ff710e25fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff710e26038 R14: 00007ffd83b88db0 R15: 00007ffd83b88e98
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: kauditd 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_acquire+0x2b6/0x2e50
Code: 48 01 00 00 8b ac 24 38 01 00 00 4c 8d af a8 0b 00 00 41 83 ff 31 48 89 74 24 10 0f 83 1c 29 00 00 4c 89 7c 24 18 4b 8d 04 bf <89> f1 81 e1 ff 1f 00 00 48 c7 c2 00 e0 ff ff 49 23 54 c5 20 48 09
RSP: 0018:ffffc90000a08b28 EFLAGS: 00000087
RAX: 000000000000000a RBX: 0000000000000000 RCX: ffffffff94163510
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffff888161a93c00
RBP: 0000000000000000 R08: 00000000305f7af5 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000000
R13: ffff888161a947a8 R14: 0000000000000002 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8882a8f49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff711a54ff8 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0x115/0x350
 advance_sched+0xa04/0xc80
 __hrtimer_run_queues+0x3bc/0xa10
 hrtimer_interrupt+0x448/0x910
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:console_flush_all+0x7d2/0xaf0
Code: ff ff e8 01 2a 21 00 90 0f 0b 90 e9 9c fc ff ff e8 f3 29 21 00 e8 ce 23 2b 0a 48 85 db 74 c0 e8 e4 29 21 00 fb 48 8b 5c 24 18 <48> 8b 44 24 28 42 80 3c 20 00 4d 8d 77 58 74 08 4c 89 f7 e8 36 26
RSP: 0018:ffffc90000aa7880 EFLAGS: 00000293
RAX: ffffffff81a5c15c RBX: ffffc90000aa79e0 RCX: ffff888161a93c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000aa7990 R08: ffffffff9057c337 R09: 1ffffffff20af866
R10: dffffc0000000000 R11: fffffbfff20af867 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8f478460
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 _printk+0xdd/0x130
 kauditd_hold_skb+0x1c8/0x210
 kauditd_send_queue+0x295/0x2e0
 kauditd_thread+0x7ef/0xa90
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
