rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13113/2:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=82069, q=369 ncpus=2)
task:syz.1.2590      state:R  running task     stack:24672 pid:13113 tgid:13113 ppid:12897  flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:182 [inline]
RIP: 0010:percpu_ref_tryget_many include/linux/percpu-refcount.h:243 [inline]
RIP: 0010:percpu_ref_tryget+0x9b/0x180 include/linux/percpu-refcount.h:266
Code: d7 8b e8 98 ad 6f ff 49 bf 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 18 34 f7 ff 48 8b 03 <a8> 03 75 69 65 48 ff 00 b3 01 e8 56 ab 87 09 85 c0 74 3a e8 ad 41
RSP: 0018:ffffc90008e4f458 EFLAGS: 00000246
RAX: 0000607f468253f0 RBX: ffff88807f8d6010 RCX: ffff888028231e00
RDX: dffffc0000000000 RSI: ffffffff8c1fca00 RDI: ffffffff8c1fc9c0
RBP: 1ffff110051e0162 R08: ffffffff92fcc807 R09: 1ffffffff25f9900
R10: dffffc0000000000 R11: fffffbfff25f9901 R12: ffff888028f00b10
R13: dffffc0000000000 R14: ffffffff82005f14 R15: dffffc0000000000
 css_tryget include/linux/cgroup_refcnt.h:45 [inline]
 get_mem_cgroup_from_objcg+0xc8/0x150 include/linux/memcontrol.h:526
 uncharge_folio+0x1f3/0x8d0 mm/memcontrol.c:4605
 __mem_cgroup_uncharge_folios+0xdf/0x1c0 mm/memcontrol.c:4665
 mem_cgroup_uncharge_folios include/linux/memcontrol.h:701 [inline]
 folios_put_refs+0x766/0x860 mm/swap.c:1038
 free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:335
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x44f/0xc80 mm/mmap.c:3395
 __mmput+0x115/0x380 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x27f0 kernel/exit.c:869
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a81975f19
RSP: 002b:00007fff163b19d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9a81975f19
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00000003163b1aff R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff163b1ac0
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff163b1ac0
 </TASK>
rcu: rcu_preempt kthread starved for 10535 jiffies! g82069 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25816 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
 __try_to_del_timer_sync+0x2ad/0x340 kernel/time/timer.c:1513
 __timer_delete_sync+0x245/0x310 kernel/time/timer.c:1665
 timer_delete_sync kernel/time/timer.c:1720 [inline]
 del_timer_sync include/linux/timer.h:185 [inline]
 schedule_timeout+0x1c8/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111