syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12603/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=46741, q=854341 ncpus=2)
task:syz.1.1727      state:R  running task     stack:27080 pid:12603 tgid:12600 ppid:5825   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__update_page_owner_free_handle+0x183/0x470 mm/page_owner.c:272
Code: 89 44 24 18 4c 89 64 24 20 66 83 7c 24 04 1f 0f 87 8e 01 00 00 e8 fd 62 95 ff 4c 89 f7 4c 8b 6c 24 28 4c 89 ee e8 4d 65 95 ff <4d> 39 f5 0f 84 2c 02 00 00 48 8b 2d 6d c5 fc 0b 4c 01 fd 83 3c 24
RSP: 0018:ffffc9000453f128 EFLAGS: 00000297
RAX: ffffffff822aeb03 RBX: dffffc0000000000 RCX: ffff88804d39bc00
RDX: 0000000000000002 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff822ae9ae
R10: 0000000000000010 R11: ffffffff81ace8a0 R12: 000000000007b589
R13: 0000000000000008 R14: 0000000000000000 R15: ffff88801e50ba80
 __reset_page_owner+0x85/0x1f0 mm/page_owner.c:309
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1248 [inline]
 __free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706
 discard_slab mm/slub.c:2717 [inline]
 __put_partials+0x161/0x1c0 mm/slub.c:3186
 put_cpu_partial+0x17c/0x250 mm/slub.c:3261
 __slab_free+0x2f7/0x400 mm/slub.c:4513
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
 vm_area_dup+0x2b/0x680 mm/vma_init.c:122
 __split_vma+0x1a9/0xa00 mm/vma.c:512
 vms_gather_munmap_vmas+0x4ab/0x12b0 mm/vma.c:1389
 __mmap_prepare mm/vma.c:2365 [inline]
 __mmap_region mm/vma.c:2621 [inline]
 mmap_region+0x678/0x1f30 mm/vma.c:2706
 do_mmap+0xc45/0x10d0 mm/mmap.c:561
 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed8558e929
RSP: 002b:00007fed86483038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fed857b6080 RCX: 00007fed8558e929
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fed85610b39 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fed857b6080 R15: 00007ffddb46b9b8
 </TASK>