rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7815/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=19665, q=1279900 ncpus=2)
task:syz.3.412       state:R  running task     stack:25944 pid:7815  tgid:7804  ppid:5846   task_flags:0x40044c flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6961
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288
 irqentry_exit+0x36/0x90 kernel/entry/common.c:197
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_access_ok+0x16/0x200 arch/x86/kernel/unwind_orc.c:389
Code: 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 4c 8d 77 08 41 55 41 54 <49> 89 d4 4c 89 f2 55 48 c1 ea 03 48 89 f5 53 48 89 fb 48 83 ec 08
RSP: 0018:ffffc90003ebf648 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff913a882a
RDX: 00000000000000a8 RSI: ffffc90003ebff58 RDI: ffffc90003ebf6e0
RBP: ffffc90003ebf728 R08: ffffffff913a882e R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90003ebf730
R13: ffffc90003ebf6e0 R14: ffffc90003ebf6e8 R15: ffffc90003ebff58
 deref_stack_regs arch/x86/kernel/unwind_orc.c:418 [inline]
 unwind_next_frame+0xc2d/0x20a0 arch/x86/kernel/unwind_orc.c:596
 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 save_stack+0x160/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
 discard_slab mm/slub.c:2753 [inline]
 __put_partials+0x165/0x1c0 mm/slub.c:3218
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:340
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
 taskstats_tgid_alloc kernel/taskstats.c:576 [inline]
 taskstats_exit+0x654/0xbe0 kernel/taskstats.c:615
 do_exit+0x5dc/0x2bf0 kernel/exit.c:936
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d10b8ebe9
RSP: 002b:00007f3d119c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000095
RAX: fffffffffffffffc RBX: 00007f3d10db6270 RCX: 00007f3d10b8ebe9
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000200000000000
RBP: 00007f3d10c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d10db6308 R14: 00007f3d10db6270 R15: 00007ffe0b332088
 </TASK>