rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=b814/1/0x4000000000000000 softirq=111817/111817 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=127617, q=448 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 23813 Comm: syz.7.4696 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5589 [inline]
RIP: 0010:lock_is_held_type+0x82/0x190 kernel/locking/lockdep.c:5923
Code: 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 fa 48 c7 c7 20 b4 0a 8c e8 05 1b 00 00 65 ff 05 ae 0d 15 74 <41> 83 bd e8 0a 00 00 00 7e 47 4c 89 eb 48 81 c3 f0 0a 00 00 31 ed
RSP: 0018:ffffc90000007c28 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88802d0c0000
RDX: ffff88802d0c0000 RSI: ffffffff8c0ab420 RDI: ffffffff8c5fac60
RBP: dffffc0000000000 R08: ffffffff89eec871 R09: fffff52000000f7c
R10: dffffc0000000000 R11: fffff52000000f7c R12: 0000000000000046
R13: ffff88802d0c0000 R14: 00000000ffffffff R15: ffff888027b82300
FS:  00007f2b4631c6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c351cc5 CR3: 000000004c14e000 CR4: 00000000003526f0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 advance_sched+0x148/0xca0 net/sched/sch_taprio.c:927
 __run_hrtimer kernel/time/hrtimer.c:1738 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1802
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1864
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </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:5855
Code: 2b 00 74 08 4c 89 f7 e8 9a a4 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:ffffc90003daec60 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007b5d98 RCX: ffff88802d0c0ae8
RDX: dffffc0000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c5fac60
RBP: ffffc90003daedb8 R08: ffffffff942c3857 R09: 1ffffffff285870a
R10: dffffc0000000000 R11: fffffbfff285870b R12: 1ffff920007b5d94
R13: dffffc0000000000 R14: ffffc90003daecc0 R15: 0000000000000246
 __fs_reclaim_acquire mm/page_alloc.c:3853 [inline]
 fs_reclaim_acquire+0x88/0x130 mm/page_alloc.c:3867
 might_alloc include/linux/sched/mm.h:318 [inline]
 prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:4512
 __alloc_frozen_pages_noprof+0x16f/0x710 mm/page_alloc.c:4728
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof+0x36/0x70 mm/mempolicy.c:2289
 shmem_alloc_folio mm/shmem.c:1863 [inline]
 shmem_alloc_and_add_folio+0x4a0/0x1090 mm/shmem.c:1902
 shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2522
 shmem_fault+0x220/0x5b0 mm/shmem.c:2723
 __do_fault+0x135/0x390 mm/memory.c:4977
 do_read_fault mm/memory.c:5392 [inline]
 do_fault mm/memory.c:5526 [inline]
 do_pte_missing mm/memory.c:4047 [inline]
 handle_pte_fault mm/memory.c:5889 [inline]
 __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6032
 handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6201
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0x1a92/0x4140 mm/gup.c:1491
 populate_vma_page_range+0x264/0x330 mm/gup.c:1929
 __mm_populate+0x27a/0x460 mm/gup.c:2032
 mm_populate include/linux/mm.h:3386 [inline]
 vm_mmap_pgoff+0x303/0x430 mm/util.c:580
 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: 0033:0x7f2b4558cda9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b4631c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f2b457a5fa0 RCX: 00007f2b4558cda9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f2b4560e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2b457a5fa0 R15: 00007ffe1aa9d598
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g127617 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=118087
rcu: rcu_preempt kthread starved for 10502 jiffies! g127617 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25624 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>