rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=7545, q=156)
rcu: All QSes seen, last rcu_preempt kthread activity 10497 (4294955260-4294944763), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10497 jiffies! g7545 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27064 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4192 Comm: syz-executor.1 Not tainted 5.15.169-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:91 [inline]
RIP: 0010:lock_acquire+0x119/0x4f0 kernel/locking/lockdep.c:5599
Code: 03 42 0f b6 04 28 84 c0 0f 85 dd 02 00 00 83 3d c0 08 82 0c 00 0f 84 3f 01 00 00 65 8b 05 2f bb 9f 7e 85 c0 0f 85 88 01 00 00 <65> 48 8b 1d df b1 9f 7e 48 81 c3 ec 0a 00 00 48 89 d8 48 c1 e8 03
RSP: 0018:ffffc90000dd0a60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8162bd8c
RDX: 0000000000000000 RSI: ffffffff8ad90420 RDI: ffffffff8ad903e0
RBP: ffffc90000dd0bc0 R08: dffffc0000000000 R09: fffffbfff1bc925e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba154
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888019ba0700
FS:  00007efcf69736c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcf6972d80 CR3: 0000000019ca7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
 rcu_read_lock include/linux/rcupdate.h:739 [inline]
 __lock_task_sighand+0x20/0x290 kernel/signal.c:1387
 lock_task_sighand include/linux/sched/signal.h:710 [inline]
 send_sigqueue+0x1f4/0x6f0 kernel/signal.c:1975
 posix_timer_event kernel/time/posix-timers.c:359 [inline]
 posix_timer_fn+0x186/0x390 kernel/time/posix-timers.c:385
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 21 7e f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1e 82 39 f7 48 89 df e8 76 d6 3a f7 e8 61 91 5d f7 fb bf 01 00 00 00 <e8> d6 1b 2e f7 65 8b 05 e7 0e d9 75 85 c0 74 02 5b c3 e8 b4 2b d7
RSP: 0018:ffffc90002ec7bc0 EFLAGS: 00000282
RAX: 0768f474a0d67400 RBX: ffff888079405c80 RCX: ffffffff913f6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a80 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186f260 R09: ffffed100f280b91
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff888079406118 R15: ffff888079405c80
 spin_unlock_irq include/linux/spinlock.h:413 [inline]
 get_signal+0x13ee/0x14e0 kernel/signal.c:2903
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efcf75f1ba7
Code: 14 25 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
RSP: 002b:00007efcf6973178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007efcf7710f88 RCX: 00007efcf75f1ba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efcf7710f88
RBP: 00007efcf7710f80 R08: 00007efcf69736c0 R09: 00007efcf69736c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efcf7710f8c
R13: 000000000000000b R14: 00007ffe1b269e40 R15: 00007ffe1b269f28
 </TASK>