rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=f21c/1/0x4000000000000000 softirq=35800/35801 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=38421, q=235 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11235 Comm: syz-executor 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:rcu_is_watching+0x5e/0xb0
Code: 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2c 25 86 00 48 c7 c3 d8 69 3a 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 <8b> 03 65 ff 0d 19 56 8e 11 74 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f
RSP: 0000:ffffc90000a08798 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88823c6339d8 RCX: 0000000000010104
RDX: ffff888028468000 RSI: ffffffff8c28aec0 RDI: ffffffff8c28ae80
RBP: 0000000000000001 R08: ffff8881684af19f R09: 1ffff1102d095e33
R10: dffffc0000000000 R11: ffffed102d095e34 R12: ffff888173f1fc00
R13: ffff8881684af000 R14: ffffffff8e265798 R15: dffffc0000000000
FS:  000055556cf93500(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e2b1ee6a0 CR3: 0000000023390000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 advance_sched+0xa56/0xc20
 __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:pie_calculate_probability+0x600/0x7e0
Code: 8d 78 10 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 74 5b 7a f8 48 8b 44 24 10 48 c7 40 10 46 c3 23 00 48 8d 78 18 48 89 f8 <48> c1 e8 03 42 80 3c 20 00 74 05 e8 50 5b 7a f8 48 8b 44 24 10 48
RSP: 0000:ffffc90000a08b68 EFLAGS: 00000246
RAX: ffffc90029c2c9d8 RBX: 0000000000000000 RCX: ffff888028468000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffc90029c2c9d8
RBP: ffffc90029c2c9c8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000141170 R12: dffffc0000000000
R13: ffff888173be42da R14: 1ffff1102e77c85b R15: 0000000000000000
 fq_pie_timer+0x288/0x5b0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 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:lock_release+0x12/0x3c0
Code: ff ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 30 <49> 89 f5 49 89 fe 65 48 8b 05 e0 4d 97 11 48 89 44 24 28 0f 1f 44
RSP: 0000:ffffc900068b7310 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffffff90c51701 RCX: 0000000080000003
RDX: ffffc900068b7401 RSI: ffffffff8176f256 RDI: ffffffff8e95cd60
RBP: dffffc0000000000 R08: ffffc900068b7f10 R09: 0000000000000000
R10: ffffc900068b7498 R11: fffff52000d16e95 R12: ffffc900068b7f20
R13: ffffc900068b0000 R14: ffffc900068b7448 R15: ffffffff8176f256
 unwind_next_frame+0x1bba/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_unref_folios+0xcec/0x1480
 folios_put_refs+0x9ff/0xb40
 folio_batch_move_lru+0x4c2/0x550
 __folio_batch_add_and_move+0x510/0xc50
 folio_add_lru_vma+0x196/0x210
 do_wp_page+0x3deb/0x4cc0
 handle_mm_fault+0x151d/0x3170
 do_user_addr_fault+0xa73/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f2e2af62367
Code: 00 00 00 80 3d 91 a4 de 00 00 0f 84 b4 00 00 00 48 c7 c0 e0 ff ff ff c7 05 8a a4 de 00 00 00 00 00 64 48 8b 08 48 85 c9 74 0b <48> c7 81 80 08 00 00 01 00 00 00 48 c7 05 63 a4 de 00 00 00 00 00
RSP: 002b:00007ffd279dde88 EFLAGS: 00010202
RAX: ffffffffffffffe0 RBX: 0000000000000000 RCX: 00007f2e2b1ede20
RDX: 0000000000000000 RSI: 00007f2e2b0531e0 RDI: 00007f2e2bd48060
RBP: 00007ffd279ddfec R08: 00007f2e2bd48060 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 000000000003754a R15: 00007ffd279de040
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g38421 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:27736 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 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: 0 UID: 0 PID: 11237 Comm: syz.2.2361 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+0xfcf/0x13d0
Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 da 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 85 03 0c 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 6a 03 0c
RSP: 0018:ffffc900067ffae0 EFLAGS: 00000246
RAX: ffffffff81b9be66 RBX: ffff88812103c148 RCX: 0000000000080000
RDX: ffffc900098ab000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900067ffc10 R08: ffffffff9030b3f7 R09: 1ffffffff206167e
R10: dffffc0000000000 R11: ffffffff81746300 R12: 1ffff110478c8169
R13: dffffc0000000000 R14: ffff88823c640b48 R15: 0000000000000001
FS:  00007f250f8bf6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f250ea4f0d1 CR3: 000000002cf68000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 clock_was_set+0x70a/0x7d0
 do_settimeofday64+0x340/0x570
 __x64_sys_clock_settime+0x253/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f250e99cdd9
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:00007f250f8bf028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f250ec15fa0 RCX: 00007f250e99cdd9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f250ea32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f250ec16038 R14: 00007f250ec15fa0 R15: 00007fff0ef80168
 </TASK>
