rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5295/1:b..l P5841/3:b..l P2/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=20253, q=115304 ncpus=2)
task:kthreadd        state:R  running task     stack:25720 pid:2     tgid:2     ppid:0      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_notrace+0xd1/0x110
 preempt_schedule_notrace_thunk+0x16/0x30
 lock_acquire+0x347/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x224/0x4f0
 security_task_alloc+0x4d/0x360
 copy_process+0x1530/0x3c00
 kernel_clone+0x21e/0x840
 kernel_thread+0x10c/0x160
 kthreadd+0x575/0x770
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
task:sshd            state:R  running task     stack:23048 pid:5841  tgid:5841  ppid:5677   task_flags:0x400100 flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 __local_bh_enable_ip+0x13e/0x1c0
 __neigh_event_send+0x9b/0x1560
 neigh_resolve_output+0x198/0x750
 ip_finish_output2+0xd40/0x1160
 ip_output+0x2a1/0x3c0
 __ip_queue_xmit+0x1106/0x1b00
 __tcp_transmit_skb+0x2215/0x3680
 tcp_write_xmit+0x1862/0x67f0
 __tcp_push_pending_frames+0x97/0x360
 tcp_sendmsg_locked+0x4afd/0x5620
 tcp_sendmsg+0x2f/0x50
 __sock_sendmsg+0x19c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a330d8bf2
RSP: 002b:00007ffe0c0ae708 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000204 RCX: 00007f5a330d8bf2
RDX: 0000000000000204 RSI: 0000559e4c986ea0 RDI: 0000000000000004
RBP: 0000559e4c965110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000559e28cabaa4
R13: 00000000000000f1 R14: 0000559e28cac3e8 R15: 00007ffe0c0ae778
 </TASK>
task:udevd           state:R  running task     stack:24808 pid:5295  tgid:5295  ppid:1      task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90
Code: 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 14 25 08 40 a0 92 65 8b 0d 88 8f e0 10 81 e1 00 01 ff 00
RSP: 0018:ffffc90003c0f428 EFLAGS: 00000246
RAX: ffffffff81cea28e RBX: 0000000000000000 RCX: ffff8881091dd640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff81cea0b6
R10: ffffc90003c0f1a0 R11: ffffffffa0000950 R12: 0000000000000cbe
R13: dffffc0000000000 R14: 00007fb4151165f4 R15: 0000000000000000
 is_bpf_text_address+0x1fe/0x2b0
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_kmalloc+0x22/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_perm+0x213/0x4b0
 security_inode_getattr+0x12f/0x330
 vfs_fstatat+0xb1/0x170
 __x64_sys_newfstatat+0x116/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb4151165f4
RSP: 002b:00007ffda4759bd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055f35f7c4780 RCX: 00007fb4151165f4
RDX: 00007ffda4759bf0 RSI: 00007fb4151b3130 RDI: 000000000000000d
RBP: 000055f35f81e200 R08: 0000000000090800 R09: 000055f35f7c3b60
R10: 0000000000001000 R11: 0000000000000202 R12: 00007ffda4759bf0
R13: 00000000000000ff R14: 000055f35906b1c4 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 9709 jiffies! g20253 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:26856 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
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+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8482 Comm: syz.3.700 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_release+0x29a/0x3e0
Code: c7 e5 5c ba 8d e8 76 e3 db 09 b8 ff ff ff ff 65 0f c1 05 19 11 03 11 83 f8 01 75 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 <f7> 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b
RSP: 0018:ffffc900001e0bc8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: 38005640f1471b00
RDX: 0000000000000000 RSI: ffffffff8dba5ce5 RDI: ffffffff8be33300
RBP: ffff88810707a7b0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200003c164 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801c68ad18 R15: ffff888107079cc0
FS:  00007ff3994656c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555594d17808 CR3: 000000002309a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_unlock_irq+0x16/0x50
 tmigr_handle_remote+0x1096/0x13d0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:task_mm_cid_work+0x5b2/0x760
Code: fe ff ff 4c 89 f7 e8 5d 55 91 00 e9 45 fe ff ff 48 8b 5c 24 28 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 64 55 91 00 0f b6 3b e8 bc 02 6e 03 49 89 c7 45
RSP: 0018:ffffc90007317ae0 EFLAGS: 00000246
RAX: 1ffff11021107eb2 RBX: ffff88810883f590 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: ffffffff8dba5ce5 RDI: ffff888107079cc0
RBP: ffffc90007317bb0 R08: 0000000000000000 R09: ffffffff8191c89f
R10: ffffc90007317840 R11: ffffffffa0000950 R12: 0000000000000002
R13: ffff88810883ec48 R14: ffff88810707b254 R15: ffffe8ffffc22968
 task_work_run+0x1d4/0x260
 get_signal+0x11ed/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff39858ebe9
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:00007ff399465038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000003 RBX: 00007ff3987c5fa0 RCX: 00007ff39858ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007ff398611e19 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff3987c6038 R14: 00007ff3987c5fa0 R15: 00007ffd9e6f4098
 </TASK>
