rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8961/1:b..l P5950/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=37001, q=1164102 ncpus=2)
task:kworker/0:5     state:R  running task     stack:20808 pid:5950  tgid:5950  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:seqcount_lockdep_reader_access+0xed/0x100 include/linux/seqlock.h:76
Code: 00 75 11 e8 a5 38 fc f7 4d 85 f6 75 16 e8 9b 38 fc f7 eb 15 e8 94 38 fc f7 e8 6f 7d e4 01 4d 85 f6 74 ea e8 85 38 fc f7 fb 5b <41> 5e c3 cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90
RSP: 0018:ffffc90004a3f990 EFLAGS: 00000293
RAX: ffffffff89c9652b RBX: 0000000000000001 RCX: ffff88802bd23d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004a3faf0 R08: ffffffff90118cb7 R09: 1ffffffff2023196
R10: dffffc0000000000 R11: fffffbfff2023197 R12: dffffc0000000000
R13: ffff888034e43318 R14: 0000000000000200 R15: 000000000000645d
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
 gc_worker+0x304/0x1290 net/netfilter/nf_conntrack_core.c:1548
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:syz.3.887       state:R  running task     stack:26240 pid:8961  tgid:8960  ppid:5883   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 35 59 0c 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 b1 46 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 16 3f 0f 0a cc 48 8d 3d 6e 56 73
RSP: 0018:ffffc9000cb7f4d8 EFLAGS: 00000286
RAX: 019311872f1c9800 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 00000000ebe047ab RSI: ffffffff8e165ab8 RDI: ffffffff8c27b500
RBP: 0000000000000000 R08: ffffffff81767de5 R09: ffffffff8e75e420
R10: ffffc9000cb7f638 R11: ffffffff81b0bfa0 R12: 0000000000000002
R13: ffffffff8e75e420 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1433 [inline]
 __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978
 __slab_free+0x263/0x2b0 mm/slub.c:5576
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4542 [inline]
 kmem_cache_alloc_bulk_noprof+0x570/0x7e0 mm/slub.c:7291
 __io_alloc_req_refill+0xb4/0x360 io_uring/io_uring.c:965
 io_alloc_req io_uring/io_uring.h:508 [inline]
 io_submit_sqes+0xfb0/0x2370 io_uring/io_uring.c:2032
 __do_sys_io_uring_enter io_uring/io_uring.c:2603 [inline]
 __se_sys_io_uring_enter+0x2cc/0x18c0 io_uring/io_uring.c:2538
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fecb819c799
RSP: 002b:00007fecb902f028 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fecb8415fa0 RCX: 00007fecb819c799
RDX: 0000000000000000 RSI: 00000000000047f6 RDI: 0000000000000008
RBP: 00007fecb8232c99 R08: 0000000000000000 R09: 0000000000000300
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fecb8416038 R14: 00007fecb8415fa0 R15: 00007fecb853fa48
 </TASK>