syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P20577/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=142769, q=427440 ncpus=2)
task:syz.1.3691      state:R  running task     stack:23464 pid:20577 tgid:20567 ppid:19726  task_flags:0x400840 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
 irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:debug_lockdep_rcu_enabled+0x29/0x40 kernel/rcu/update.c:321
Code: 90 f3 0f 1e fa 31 c0 83 3d 63 bd 87 04 00 74 1d 83 3d 1a ef 87 04 00 74 14 65 48 8b 0d 58 55 90 07 31 c0 83 b9 8c 0b 00 00 00 <0f> 94 c0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc9000380e370 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8226ac56 RCX: ffff88803109bd80
RDX: 00000000cdac3f13 RSI: ffffffff8e21eb50 RDI: ffffffff8c28b0e0
RBP: dffffc0000000000 R08: ffffffff8176f256 R09: ffffffff8e95cde0
R10: ffffc9000380e498 R11: ffffffff81b0efc0 R12: ffffc9000380e480
R13: 1ffff92000701c89 R14: ffffc9000380e448 R15: ffffffff8176f256
 rcu_read_lock include/linux/rcupdate.h:839 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
 unwind_next_frame+0xcc/0x2550 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:1402 [inline]
 free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004
 shrink_folio_list+0x2a26/0x52a0 mm/vmscan.c:1516
 reclaim_folio_list+0x100/0x430 mm/vmscan.c:2171
 reclaim_pages+0x45b/0x530 mm/vmscan.c:2208
 madvise_cold_or_pageout_pte_range+0x1ef5/0x2220 mm/madvise.c:563
 walk_pmd_range mm/pagewalk.c:148 [inline]
 walk_pud_range mm/pagewalk.c:239 [inline]
 walk_p4d_range mm/pagewalk.c:280 [inline]
 walk_pgd_range+0xfdc/0x1d90 mm/pagewalk.c:321
 __walk_page_range+0x14c/0x710 mm/pagewalk.c:429
 walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:733
 madvise_pageout_page_range mm/madvise.c:622 [inline]
 madvise_pageout mm/madvise.c:647 [inline]
 madvise_vma_behavior+0x28b9/0x42c0 mm/madvise.c:1358
 madvise_walk_vmas+0x573/0xae0 mm/madvise.c:1713
 madvise_do_behavior+0x386/0x540 mm/madvise.c:1929
 do_madvise+0x1fa/0x2e0 mm/madvise.c:2022
 __do_sys_madvise mm/madvise.c:2031 [inline]
 __se_sys_madvise mm/madvise.c:2029 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2029
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a1919ce59
RSP: 002b:00007f1a19fdd028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f1a19416270 RCX: 00007f1a1919ce59
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007f1a19232d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a19416308 R14: 00007f1a19416270 R15: 00007f1a1953fa48
 </TASK>