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: 	(detected by 1, t=10502 jiffies, g=55273, q=499 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10496 (4294974404-4294963908), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10495 jiffies! g55273 f0x2 RCU_GP_WAIT_FQS(5) ->state=R
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=15880
rcu: rcu_preempt kthread starved for 10496 jiffies! g55273 f0x2 RCU_GP_WAIT_FQS(5) ->state=R ->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 stack:27688 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x38b/0x480
 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: 13046 Comm: syz.4.2290 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+0x33e/0x2de0
Code: 0b 00 00 41 83 fe 31 48 89 74 24 20 0f 83 54 28 00 00 4c 89 74 24 38 4b 8d 04 b6 89 f1 81 e1 ff 1f 00 00 48 c7 c2 00 e0 ff ff <49> 23 54 c5 20 48 09 ca 49 89 54 c5 20 4d 89 44 c5 08 48 8b 54 24
RSP: 0018:ffffc90000007b08 EFLAGS: 00000046
RAX: 0000000000000014 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffffffffe000 RSI: 0000000000000000 RDI: 000000001879a0fc
RBP: 0000000000000000 R08: ffffffff84eb5f27 R09: 0000000000000001
R10: ffffc90000007d20 R11: fffff52000000fa6 R12: 0000000000000000
R13: ffff88811a0929b0 R14: 0000000000000004 R15: ffff88811a091e00
FS:  00007f87d16536c0(0000) GS:ffff88818d6c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87d1631ff8 CR3: 00000001162f4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x115/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 debug_object_activate+0xb7/0x420
 enqueue_hrtimer+0xa9/0x2c0
 __hrtimer_run_queues+0x4ce/0xa10
 hrtimer_interrupt+0x4cd/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x4f4/0x2550
Code: 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 48 39 e8 4c 0f 46 f9 48
RSP: 0018:ffffc90007c775c0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff909d2aa0 RCX: dffffc0000000000
RDX: ffffffff909d2a94 RSI: ffffffff9120b748 RDI: ffffffff8c6dad20
RBP: ffffffff82383197 R08: 0000000000000007 R09: 0000000000000000
R10: ffffc90007c776b8 R11: ffffffff81b2c450 R12: ffffffff909d2aac
R13: ffffffff909d2a94 R14: ffffc90007c77668 R15: ffffffff909d2a94
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xc93/0xd90
 __slab_free+0x274/0x2c0
 qlist_free_all+0x99/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x307/0x720
 tomoyo_realpath_from_path+0xef/0x640
 tomoyo_path_number_perm+0x246/0x5f0
 security_file_ioctl+0xc3/0x2a0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87d079e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f87d1653028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f87d0a25fa0 RCX: 00007f87d079e159
RDX: 0000200000000200 RSI: 0000000000008914 RDI: 0000000000000004
RBP: 00007f87d083506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f87d0a26038 R14: 00007f87d0a25fa0 R15: 00007ffd5c2ebdb8
 </TASK>
