rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=6309, q=6 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294967666-4294957164), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g6309 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:26440 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1960/0x4a80 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x30a/0x14f0 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1830
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </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: 5106 Comm: syz-executor399 Not tainted 6.6.0-syzkaller-16176-g1b907d050735 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__lock_acquire+0xab/0x7f70 kernel/locking/lockdep.c:4992
Code: f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 03 48 b8 f2 f2 f2 00 f2 f2 f2 00 4a 89 44 03 09 48 b8 f2 f2 f2 f2 f2 00 00 00 4a 89 44 03 17 <48> b8 f2 f2 f2 f2 f2 00 f3 f3 4a 89 44 03 23 42 c6 44 03 2b f3 65
RSP: 0018:ffffc900045f7400 EFLAGS: 00000802
RAX: 000000f2f2f2f2f2 RBX: 1ffff920008beea4 RCX: 0000000000000002
RDX: ffffffff8d946cc8 RSI: 0000000000000000 RDI: ffffffff8d946cc8
RBP: ffffc900045f76c8 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1e01a46 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000046
FS:  00005555556443c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000076828000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753
 seqcount_lockdep_reader_access+0xfc/0x220 include/linux/seqlock.h:102
 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get+0x83/0x270 kernel/time/timekeeping.c:848
 clockevents_program_min_delta+0x55/0x410 kernel/time/clockevents.c:241
 hrtimer_start_range_ns+0xac1/0xc60 kernel/time/hrtimer.c:1302
 posixtimer_rearm+0x1b1/0x3f0 kernel/time/posix-timers.c:267
 dequeue_signal+0x249/0x590 kernel/signal.c:705
 get_signal+0x5f6/0x1840 kernel/signal.c:2784
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fecfb1cde79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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:00007ffe77891128 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fecfb1cde79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000555555644370
R13: 0000000000000003 R14: 00007ffe778911a0 R15: 00007ffe77891190
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.889 msecs