rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10505 jiffies, g=8785, q=1495 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 9496 (4294956229-4294946733), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 9496 jiffies! g8785 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:24912 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f0/0x390 kernel/kthread.c:388
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5185 Comm: syz-executor.4 Not tainted 6.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4614 [inline]
RIP: 0010:__lock_acquire+0xd0f/0x1fd0 kernel/locking/lockdep.c:5121
Code: e8 48 c1 e8 03 80 3c 38 00 74 12 48 89 ef e8 f8 10 88 00 48 bf 00 00 00 00 00 fc ff df 4c 89 65 00 48 8b 44 24 40 0f b6 04 38 <84> c0 0f 85 f6 0b 00 00 48 8b 04 24 8b 18 48 85 db 74 59 83 fb 31
RSP: 0018:ffffc900000077f0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888025cf8ac8 RCX: ffffffff81729ecd
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff888025cf8b78 R08: ffffffff92f35507 R09: 1ffffffff25e6aa0
R10: dffffc0000000000 R11: fffffbfff25e6aa1 R12: d6bf87c490213bdc
R13: ffff888025cf8000 R14: 0000000000000000 R15: ffff888025cf8b98
FS:  00007fbae62606c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201b2000 CR3: 000000007c2b6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 debug_objects_fill_pool+0x9f/0x9b0 lib/debugobjects.c:614
 debug_object_activate+0x135/0x510 lib/debugobjects.c:704
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1090
 __run_hrtimer kernel/time/hrtimer.c:1709 [inline]
 __hrtimer_run_queues+0x6d5/0xd50 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 6a 21 88 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000436e6e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200086dce8 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaca00 RDI: ffffffff8c1f7ea0
RBP: ffffc9000436e828 R08: ffffffff92f3555f R09: 1ffffffff25e6aab
R10: dffffc0000000000 R11: fffffbfff25e6aac R12: 1ffff9200086dce4
R13: dffffc0000000000 R14: ffffc9000436e740 R15: 0000000000000246
 local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 folio_add_lru+0x370/0xd70 mm/swap.c:530
 shmem_alloc_and_add_folio+0x957/0xbc0 mm/shmem.c:1722
 shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055
 shmem_fault+0x254/0x6f0 mm/shmem.c:2255
 __do_fault+0x135/0x460 mm/memory.c:4531
 do_read_fault mm/memory.c:4894 [inline]
 do_fault mm/memory.c:5024 [inline]
 do_pte_missing mm/memory.c:3880 [inline]
 handle_pte_fault mm/memory.c:5300 [inline]
 __handle_mm_fault+0x45fe/0x7250 mm/memory.c:5441
 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5606
 faultin_page mm/gup.c:958 [inline]
 __get_user_pages+0x727/0x1630 mm/gup.c:1257
 __get_user_pages_locked mm/gup.c:1525 [inline]
 get_dump_page+0x155/0x2f0 mm/gup.c:2043
 dump_user_range+0x14c/0x950 fs/coredump.c:949
 elf_core_dump+0x3d5e/0x4630 fs/binfmt_elf.c:2077
 do_coredump+0x1bab/0x2b50 fs/coredump.c:764
 get_signal+0x13fa/0x1740 kernel/signal.c:2896
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x79/0x280 kernel/entry/common.c:231
 exc_page_fault+0x585/0x8e0 arch/x86/mm/fault.c:1566
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fbae547deb1
Code: c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 <c3> 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00000000fffffe20 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fbae55abf80 RCX: 00007fbae547dea9
RDX: 0000000000000000 RSI: 00000000fffffe20 RDI: 0000000000000000
RBP: 00007fbae54ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbae55abf80 R15: 00007fbae56cf9f8
 </TASK>