rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=be1c/1/0x4000000000000000 softirq=49766/49766 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=80821, q=436 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16943 Comm: syz.5.4370 Not tainted 6.11.0-rc7-syzkaller-00020-g8d8d276ba2fb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:239 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4772 [inline]
RIP: 0010:__lock_acquire+0x4de/0x2040 kernel/locking/lockdep.c:5092
Code: 00 44 89 3b 44 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 48 1e 94 be 08 00 00 00 e8 1c ff 8a 00 48 0f a3 1d 84 70 ae 12 73 27 <48> 69 c3 c8 00 00 00 48 8d 98 40 c7 ba 93 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90000007910 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816fd7b4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff941e4840
RBP: 000000000000000a R08: ffffffff941e4847 R09: 1ffffffff283c908
R10: dffffc0000000000 R11: fffffbfff283c909 R12: ffff888030bcbc00
R13: 0000000000000001 R14: 00000000000c4001 R15: 0000000000000000
FS:  0000555590262500(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f346b0f0d58 CR3: 00000000352a2000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x16d/0x510 lib/debugobjects.c:709
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1706 [inline]
 __hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5763
Code: 2b 00 74 08 4c 89 f7 e8 ea 05 8b 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:ffffc900034afb80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000695f7c RCX: d404e0535079f700
RDX: dffffc0000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c608f40
RBP: ffffc900034afcd0 R08: ffffffff941e4877 R09: 1ffffffff283c90e
R10: dffffc0000000000 R11: fffffbfff283c90f R12: 1ffff92000695f78
R13: dffffc0000000000 R14: ffffc900034afbe0 R15: 0000000000000246
 __might_fault+0xc6/0x120 mm/memory.c:6387
 _inline_copy_from_user include/linux/uaccess.h:154 [inline]
 _copy_from_user+0x2a/0xe0 lib/usercopy.c:18
 copy_from_user include/linux/uaccess.h:196 [inline]
 get_timespec64+0x97/0x280 kernel/time/time.c:877
 __do_sys_futex kernel/futex/syscalls.c:171 [inline]
 __se_sys_futex+0x1a2/0x480 kernel/futex/syscalls.c:160
 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: 0033:0x7f346a37def9
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:00007ffde43985f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ffde4398720 RCX: 00007f346a37def9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f346a536064
RBP: 00007f346a536064 R08: 7fffffffffffffff R09: 00007ffde43988ef
R10: 00007ffde4398700 R11: 0000000000000246 R12: 0000000000094092
R13: 00007ffde4398700 R14: 0000000000000032 R15: 0000000000094060
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g80821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=42989
rcu: rcu_preempt kthread starved for 10506 jiffies! g80821 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 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+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>