rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=11cc/1/0x4000000000000000 softirq=74022/74022 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=71073, q=360 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5825 Comm: syz-executor Not tainted 6.14.0-syzkaller-00685-g3ba7dfb8da62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__remove_hrtimer kernel/time/hrtimer.c:1134 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1781 [inline]
RIP: 0010:__hrtimer_run_queues+0x407/0xd30 kernel/time/hrtimer.c:1865
Code: 9c 24 90 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 7c 05 00 00 44 8b 2b bf 20 00 00 00 44 89 ee e8 59 c6 12 00 <49> 83 fd 1f 0f 87 9d 05 00 00 e8 0a c2 12 00 bb fe ff ff ff 44 89
RSP: 0018:ffffc90000a08d40 EFLAGS: 00000006
RAX: 0000000000010000 RBX: ffff8880b872c608 RCX: dffffc0000000000
RDX: ffff888069118000 RSI: 0000000000000001 RDI: 0000000000000020
RBP: ffffc90000a08ea0 R08: ffffffff81af3507 R09: 1ffffffff207770e
R10: dffffc0000000000 R11: fffffbfff207770f R12: 1ffff110170e58cb
R13: 0000000000000001 R14: ffff88807fae1340 R15: ffff8880b872c500
FS:  000055557069d500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2acd8d56c0 CR3: 00000000616f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 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 1a d7 89 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:ffffc900042af620 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000855ed0 RCX: ffff888069118ae8
RDX: dffffc0000000000 RSI: ffffffff8c2ac600 RDI: ffffffff8c801860
RBP: ffffc900042af768 R08: ffffffff94517857 R09: 1ffffffff28a2f0a
R10: dffffc0000000000 R11: fffffbfff28a2f0b R12: 1ffff92000855ecc
R13: dffffc0000000000 R14: ffffc900042af680 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]
 slab_pre_alloc_hook mm/slub.c:4089 [inline]
 slab_alloc_node mm/slub.c:4167 [inline]
 kmem_cache_alloc_noprof+0x41/0x380 mm/slub.c:4194
 vm_area_dup+0x27/0x290 kernel/fork.c:487
 dup_mmap kernel/fork.c:694 [inline]
 dup_mm kernel/fork.c:1700 [inline]
 copy_mm+0xce0/0x2170 kernel/fork.c:1752
 copy_process+0x17d1/0x3cf0 kernel/fork.c:2396
 kernel_clone+0x223/0x870 kernel/fork.c:2811
 __do_sys_clone kernel/fork.c:2954 [inline]
 __se_sys_clone kernel/fork.c:2938 [inline]
 __x64_sys_clone+0x267/0x2e0 kernel/fork.c:2938
 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: 0033:0x7f2accb839d3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff4b056218 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2accb839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055557069d7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 00000000000b54ea R15: 00007fff4b0563b0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g71073 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=50805
rcu: rcu_preempt kthread starved for 10502 jiffies! g71073 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:24912 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 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>