rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=b57c/1/0x4000000000000000 softirq=19271/19271 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=26861, q=804 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8710 Comm: syz-executor.3 Not tainted 6.9.0-rc7-syzkaller-00113-ga2c78977950d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__lock_acquire+0xd96/0x1fd0 kernel/locking/lockdep.c:5127
Code: 74 0d 41 be 01 00 00 00 49 c7 c4 ff ff ff ff 4d 89 ef 48 8b 44 24 20 0f b6 04 38 84 c0 0f 85 a8 0b 00 00 48 8b 44 24 10 8b 18 <48> 83 bc 24 c8 00 00 00 00 0f 84 a1 00 00 00 48 8b 44 24 40 0f b6
RSP: 0018:ffffc90000007a30 EFLAGS: 00000046
RAX: ffff888078caa920 RBX: 00000000000c49f6 RCX: ffff888078caa8d8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff888078caa900 R08: ffffffff92f3563f R09: 1ffffffff25e6ac7
R10: dffffc0000000000 R11: fffffbfff25e6ac8 R12: ffffffffffffffff
R13: ffff888078ca9e00 R14: 0000000000000001 R15: ffff888078ca9e00
FS:  00007f78da7b96c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 0000000023836000 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
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x5a5/0xd50 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2a 8f e7 f5 48 89 df e8 42 cf e8 f5 e8 8d 29 12 f6 fb bf 01 00 00 00 <e8> 32 94 da f5 65 8b 05 d3 b7 78 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000366f0d0 EFLAGS: 00000286
RAX: 88a310708d516c00 RBX: ffff88802e4931a0 RCX: ffffffff8172f77a
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc9000366f230 R08: ffffffff92f35537 R09: 1ffffffff25e6aa6
R10: dffffc0000000000 R11: fffffbfff25e6aa7 R12: dffffc0000000000
R13: 0000000000000cc0 R14: 1ffff920006cde33 R15: ffffea00016ed0c0
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 shmem_add_to_page_cache+0x951/0x1830 mm/shmem.c:799
 shmem_alloc_and_add_folio+0x51f/0xbc0 mm/shmem.c:1689
 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
 populate_vma_page_range+0x2ae/0x390 mm/gup.c:1697
 __mm_populate+0x27a/0x460 mm/gup.c:1800
 mm_populate include/linux/mm.h:3413 [inline]
 vm_mmap_pgoff+0x305/0x420 mm/util.c:578
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78d9a7dd69
Code: 28 00 00 00 75 05 48 83 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
RSP: 002b:00007f78da7b90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f78d9bac1f0 RCX: 00007f78d9a7dd69
RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f78d9aca49e R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f78d9bac1f0 R15: 00007ffecc1154f8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g26861 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=13472
rcu: rcu_preempt kthread starved for 10538 jiffies! g26861 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:24560 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>