rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6230/1:b..l P6208/1:b..l
rcu: 	(detected by 1, t=10504 jiffies, g=13513, q=543560 ncpus=2)
task:syz.4.114       state:R  running task     stack:26616 pid:6208  tgid:6208  ppid:5612   task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 zap_pte_range mm/memory.c:2095 [inline]
 zap_pmd_range mm/memory.c:2151 [inline]
 zap_pud_range mm/memory.c:2179 [inline]
 zap_p4d_range mm/memory.c:2200 [inline]
 __zap_vma_range+0x16b0/0x48e0 mm/memory.c:2240
 unmap_vmas+0x299/0x5f0 mm/memory.c:2309
 exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
 __mmput+0x12a/0x410 kernel/fork.c:1193
 mmput+0x67/0x80 kernel/fork.c:1216
 exit_mm kernel/exit.c:618 [inline]
 do_exit+0x8b1/0x2ae0 kernel/exit.c:1000
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1155
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f324739e159
RSP: 002b:00007ffc64e18d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000019bd3 RCX: 00007f324739e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f324762609c
RBP: 0000000000000032 R08: 0000000000000001 R09: 0000000000000000
R10: 00007ffc64e18ea0 R11: 0000000000000246 R12: 00007ffc64e18ec0
R13: 00007f324762609c R14: 0000000000019c05 R15: 00007ffc64e18ea0
 </TASK>
task:syz.1.118       state:R  running task     stack:27016 pid:6230  tgid:6226  ppid:5609   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x167b/0x2090 arch/x86/kernel/unwind_orc.c:694
Code: 00 0f 84 42 f9 ff ff 4c 89 e7 e8 40 d6 c5 00 e9 35 f9 ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 <0f> 85 29 06 00 00 49 8d 7d 08 49 8b 5d 38 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90002efefc0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff91f783c8
RDX: 1ffff920005dfe0d RSI: ffffc90002eff388 RDI: ffffc90002eff070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000017fb4 R12: ffffc90002eff080
R13: ffffc90002eff030 R14: ffffc90002eff398 R15: ffffc90002eff064
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 save_stack+0x162/0x1e0 mm/page_owner.c:183
 __reset_page_owner+0x84/0x190 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 kmem_cache_alloc_noprof+0x269/0x6a0 mm/slub.c:5010
 ptlock_alloc+0x1f/0x70 mm/memory.c:7721
 ptlock_init include/linux/mm.h:3884 [inline]
 pagetable_pte_ctor include/linux/mm.h:3933 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:79 [inline]
 pte_alloc_one+0x82/0x3d0 arch/x86/mm/pgtable.c:18
 __pte_alloc+0x6d/0x380 mm/memory.c:453
 copy_pte_range mm/memory.c:1335 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x3b36/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2310
 kernel_clone+0x176/0x9d0 kernel/fork.c:2769
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2911
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f388bd9e159
RSP: 002b:00007f388cd14fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f388c026090 RCX: 00007f388bd9e159
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f388be3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f388c026128 R14: 00007f388c026090 R15: 00007ffe7e32b888
 </TASK>