rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=7225, q=28 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294967579-4294957079), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g7225 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:26504 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x196c/0x4af0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1613
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1812
 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:304
 </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: 5082 Comm: syz-executor253 Not tainted 6.6.0-rc7-syzkaller-00195-g2af9b20dbb39 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:304
Code: 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 15 a0 97 75 7e 65 8b 05 a1 97 75 7e a9 00 01 ff 00 74 10
RSP: 0018:ffffc900001f0c18 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff888018b2bb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001f0ce8 R08: ffffffff81583e70 R09: 1ffff11004a9e5c8
R10: dffffc0000000000 R11: ffffed1004a9e5c9 R12: 1ffff9200003e18c
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888018b2c480
FS:  0000555555c423c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 000000007363d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_read_unlock include/linux/rcupdate.h:778 [inline]
 send_sigqueue+0x5c0/0x760 kernel/signal.c:2038
 posix_timer_event kernel/time/posix-timers.c:298 [inline]
 posix_timer_fn+0x18a/0x390 kernel/time/posix-timers.c:324
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x59f/0xd10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
 __sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1080
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
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: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3a d6 96 f6 48 89 df e8 42 c6 97 f6 e8 3d 3b be f6 fb bf 01 00 00 00 <e8> 62 cc 89 f6 65 8b 05 53 04 2d 75 85 c0 74 02 5b c3 e8 f0 d1 29
RSP: 0018:ffffc90003d3fc50 EFLAGS: 00000282
RAX: 8e1aaa3291003f00 RBX: ffff8880254f2e40 RCX: ffffffff91edc303
RDX: dffffc0000000000 RSI: ffffffff8b0aa520 RDI: 0000000000000001
RBP: ffffc90003d3fd90 R08: ffffffff8e996d6f R09: 1ffffffff1d32dad
R10: dffffc0000000000 R11: fffffbfff1d32dae R12: 1ffff11004a9e65b
R13: 000000001c000004 R14: 0000000000000021 R15: ffff8880254f32d8
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x155d/0x1840 kernel/signal.c:2895
 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+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc603c58fea
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 c3 64 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 23 65 02 00 8b 44 24
RSP: 002b:00007fff235620d0 EFLAGS: 00000293
RAX: fffffffffffffff7 RBX: 0000000000000005 RCX: 00007fc603c58fea
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000555555c42370
R13: 0000000000000002 R14: 00007fff23562160 R15: 00007fff23562150
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.413 msecs