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: 	0-...!: (1 ticks this GP) idle=2f74/1/0x4000000000000000 softirq=240333/240334 fqs=4
rcu: 	(detected by 1, t=10502 jiffies, g=271061, q=257 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15565 Comm: syz.9.17080 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+0x1455/0x2cf0
Code: ed 65 48 8b 05 cc 19 97 11 48 3b 84 24 e0 00 00 00 0f 85 69 16 00 00 89 e8 48 81 c4 e8 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> cc cc cc cc cc 4d 85 ff 4c 8b 6c 24 10 0f 84 c8 10 00 00 e8 f2
RSP: 0018:ffffc900000078b8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 35e51cab1c0d22fa
RDX: 000000009690b000 RSI: 0000000043daa740 RDI: ffff888106730000
RBP: ffffffff89b82494 R08: ffffffff89b82494 R09: ffff8881154622c0
R10: dffffc0000000000 R11: ffffffff89b823e0 R12: 0000000000000000
R13: ffff8881154622c0 R14: 0000000000000001 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f40305ada40 CR3: 000000000e74a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x106/0x350
 _raw_spin_lock+0x2e/0x40
 advance_sched+0xb4/0xc20
 __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:__kasan_check_read+0xa/0x20
Code: 31 ed eb cf cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f6 48 8b 0c 24 <31> d2 e9 8f e5 ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90000007d40 EFLAGS: 00000246
RAX: 057ff00000000001 RBX: ffffea00068a9280 RCX: ffffffff822343bf
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00068a92b4
RBP: 0000000000000000 R08: ffffea00068a9287 R09: 1ffffd4000d15250
R10: dffffc0000000000 R11: fffff94000d15251 R12: 057ff00000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00068a92b4
 ___free_pages+0x6f/0x1b0
 tlb_remove_table_rcu+0x85/0x100
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_call_function_single+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:rcu_lockdep_current_cpu_online+0xf8/0x120
Code: 48 c7 c7 40 32 96 8e be 04 00 00 00 e8 51 f3 85 00 83 3d da 24 eb 0c 00 74 16 b0 01 65 ff 0d bf c2 8d 11 74 0f 5b 41 5e 41 5f <c3> cc cc cc cc cc 31 c0 eb e8 e8 e9 8d 88 ff eb ea 48 c7 c7 80 25
RSP: 0018:ffffc90004587040 EFLAGS: 00000286
RAX: 1ffffffff1d2c501 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8c28b140 RDI: ffff88812103bea8
RBP: dffffc0000000000 R08: ffffffff823c8c2a R09: ffffffff8e95cda0
R10: dffffc0000000000 R11: ffffed102d5b00ac R12: 00000000001a75b5
R13: dffffc0000000000 R14: ffff88814febf690 R15: 0000000000001000
 rcu_read_lock_held+0x1e/0x50
 page_ext_lookup+0xe7/0x180
 __page_table_check_zero+0x135/0x3e0
 free_unref_folios+0xcee/0x1430
 folios_put_refs+0xa3d/0xb80
 shmem_undo_range+0x52c/0x1660
 shmem_evict_inode+0x289/0xae0
 evict+0x61e/0xb10
 __dentry_kill+0x1a2/0x690
 finish_dput+0xc9/0x480
 __fput+0x691/0xa60
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa09e39cdd9
Code: Unable to access opcode bytes at 0x7fa09e39cdaf.
RSP: 002b:00007fa09f201028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007fa09e615fa0 RCX: 00007fa09e39cdd9
RDX: 0000000000000651 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007fa09e432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa09e616038 R14: 00007fa09e615fa0 R15: 00007fffe858cfa8
 </TASK>
rcu: rcu_preempt kthread starved for 10416 jiffies! g271061 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:
CPU: 1 UID: 0 PID: 120 Comm: kworker/u10:5 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
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x70
Code: b8 2b 73 11 65 8b 15 d9 2b 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 32 48 8d 7e 01 8b 89 ac
RSP: 0018:ffffc900029a76f8 EFLAGS: 00000246
RAX: ffffffff81b9abb6 RBX: ffff88823c63c148 RCX: ffff888169be5880
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900029a7840 R08: ffffffff9030a6f7 R09: 1ffffffff20614de
R10: dffffc0000000000 R11: fffffbfff20614df R12: 1ffff11024208589
R13: dffffc0000000000 R14: ffff888121042c48 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b251ea4c0 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xfe6/0x13d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f5/0x1160
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x240
 static_key_enable+0x1a/0x20
 toggle_allocation_gate+0xab/0x290
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
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
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
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
