rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5637/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=8381, q=573 ncpus=2)
task:syz.4.91        state:R  running task     stack:23984 pid:5637  tgid:5636  ppid:5224   flags:0x00004002
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:ptlock_ptr include/linux/mm.h:2900 [inline]
RIP: 0010:pte_lockptr include/linux/mm.h:2924 [inline]
RIP: 0010:__pte_offset_map_lock+0x1a5/0x300 mm/pgtable-generic.c:374
Code: 4c 21 eb 48 c1 eb 06 48 b8 28 00 00 00 00 ea ff ff 48 01 c3 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 80 3c 28 00 <74> 08 48 89 df e8 e1 66 12 00 4c 8b 33 4c 89 f7 e8 a6 d8 d5 09 48
RSP: 0018:ffffc9000d547280 EFLAGS: 00000246
RAX: 1ffffd400014aef5 RBX: ffffea0000a577a8 RCX: ffff888027700000
RDX: 00000000295deea8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d547370 R08: ffffffff81e546fb R09: 1ffffffff27f4d08
R10: dffffc0000000000 R11: fffffbfff27f4d09 R12: 1ffff92001aa8e58
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92001aa8e60
 pte_offset_map_lock include/linux/mm.h:3000 [inline]
 finish_fault+0x79d/0x1480 mm/memory.c:4908
 do_read_fault mm/memory.c:5065 [inline]
 do_fault mm/memory.c:5191 [inline]
 do_pte_missing mm/memory.c:3947 [inline]
 handle_pte_fault+0x3247/0x6fc0 mm/memory.c:5521
 __handle_mm_fault mm/memory.c:5664 [inline]
 handle_mm_fault+0x1056/0x1ad0 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x6ec/0x16a0 mm/gup.c:1493
 populate_vma_page_range+0x264/0x330 mm/gup.c:1932
 __mm_populate+0x27a/0x460 mm/gup.c:2035
 mm_populate include/linux/mm.h:3430 [inline]
 vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:593
 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: 0033:0x7fc1ce17cef9
RSP: 002b:00007fc1cee9f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fc1ce335f80 RCX: 00007fc1ce17cef9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fc1ce1ef01e R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc1ce335f80 R15: 00007ffcdfe61a28
 </TASK>
rcu: rcu_preempt kthread starved for 10543 jiffies! g8381 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
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 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:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d6 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 25 2e 98 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff88801d2a8000 RBX: ffff8880212e3864 RCX: 0000000000d87239
RDX: 0000000000000001 RSI: ffff8880212e3800 RDI: ffff8880212e3864
RBP: 000000000003a638 R08: ffff8880b8937c7b R09: 1ffff11017126f8f
R10: dffffc0000000000 R11: ffffffff8bb13c50 R12: ffff888021bba800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eed1c40
FS:  0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002480 CR3: 0000000020f58000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x375/0x5d0 kernel/sched/idle.c:326
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>