rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=15c4/1/0x4000000000000000 softirq=39605/39605 fqs=0
rcu: 	(detected by 0, t=10505 jiffies, g=31721, q=622 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12332 Comm: syz.0.2428 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x41/0xc0 kernel/rcu/tree.c:737
Code: 03 00 83 f8 07 89 c5 0f 87 82 00 00 00 48 8d 3c ed a0 3b a8 8d 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed a0 3b a8 8d 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc90000a18c90 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000037f68 RCX: ffffffff816b6969
RDX: 1ffffffff1b50775 RSI: ffffffff8bd1e1c0 RDI: ffffffff8da83ba8
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20c17da
R10: ffffffff9060bed7 R11: 00000000000a4001 R12: ffff88807b150300
R13: ffff8880334a6000 R14: ffff88807b150340 R15: ffff888029e43c00
FS:  00007f260df2c6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2462cf CR3: 000000003354a000 CR4: 00000000003526f0
DR0: 0040000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x4e2/0x6f0 kernel/locking/lockdep.c:5860
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x611/0xc60 net/sched/sch_taprio.c:981
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/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_release+0x54/0x6f0 kernel/locking/lockdep.c:5857
Code: 24 08 48 c7 44 24 10 b3 8a b5 41 48 c1 eb 03 48 c7 44 24 18 58 fb 7b 8d 48 01 d8 48 c7 44 24 20 c0 68 6b 81 c7 00 f1 f1 f1 f1 <c7> 40 04 f1 f1 04 f2 c7 40 08 04 f3 f3 f3 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc90002ef73e0 EFLAGS: 00000286
RAX: fffff520005dee7e RBX: 1ffff920005dee7e RCX: ffffc90005719000
RDX: 1ffff110170e7005 RSI: ffffffff81c91b73 RDI: ffff8880b8738000
RBP: ffff8880b8738028 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000d711 R12: ffff8880b8738000
R13: 0000000000000000 R14: ffff8880b8738030 R15: 000000000000000e
 local_lock_release include/linux/local_lock_internal.h:38 [inline]
 __folio_batch_add_and_move+0x5f8/0xc60 mm/swap.c:201
 shmem_alloc_and_add_folio+0x83b/0xc00 mm/shmem.c:1892
 shmem_get_folio_gfp+0x689/0x1530 mm/shmem.c:2355
 shmem_fault+0x200/0xae0 mm/shmem.c:2556
 __do_fault+0x10a/0x490 mm/memory.c:4907
 do_read_fault mm/memory.c:5322 [inline]
 do_fault mm/memory.c:5456 [inline]
 do_pte_missing+0xec2/0x3e70 mm/memory.c:3979
 handle_pte_fault mm/memory.c:5801 [inline]
 __handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
 faultin_page mm/gup.c:1187 [inline]
 __get_user_pages+0x8d9/0x3b50 mm/gup.c:1485
 populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1923
 __mm_populate+0x1d6/0x380 mm/gup.c:2026
 mm_populate include/linux/mm.h:3386 [inline]
 vm_mmap_pgoff+0x293/0x360 mm/util.c:585
 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:542
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f260d180809
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:00007f260df2c058 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f260d345fa0 RCX: 00007f260d180809
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f260d1f393e R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f260d345fa0 R15: 00007ffc9999aa68
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g31721 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=23587
rcu: rcu_preempt kthread starved for 10505 jiffies! g31721 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26304 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>