rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=e754/1/0x4000000000000000 softirq=24359/24359 fqs=553
	(t=10502 jiffies g=36333 q=234 ncpus=2)
rcu: rcu_preempt kthread starved for 9397 jiffies! g36333 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:26688 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:207
Code: 48 8b 3d 98 f0 e8 0c 48 89 de 5b e9 27 aa 56 00 cc cc cc cc cc cc cc 48 8b 04 24 65 48 8b 0d 64 db 77 7e 65 8b 15 65 db 77 7e <f7> c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00
RSP: 0018:ffffc90000007900 EFLAGS: 00000046
RAX: ffffffff817a36d6 RBX: 7fffffffffffffff RCX: ffffffff8cebd800
RDX: 0000000080010103 RSI: 7fffffffffffffff RDI: 7fffffffffffffff
RBP: 7fffffffffffffff R08: ffffffff817a36cc R09: fffffbfff2093846
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff91cd95a0
R13: dffffc0000000000 R14: 1ffffffff239b2cb R15: ffffffff91cd9658
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc89ebfea4c CR3: 0000000027f71000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 tk_update_leap_state kernel/time/timekeeping.c:718 [inline]
 timekeeping_update+0xb6/0x450 kernel/time/timekeeping.c:764
 timekeeping_advance+0x791/0xaa0 kernel/time/timekeeping.c:2215
 update_wall_time+0xc/0x20 kernel/time/timekeeping.c:2231
 tick_sched_do_timer kernel/time/tick-sched.c:210 [inline]
 tick_sched_timer+0xb8/0x550 kernel/time/tick-sched.c:1494
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 c2 b8 4c f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 67 06 c9 f6 65 8b 05 08 13 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007d60 EFLAGS: 00000206
RAX: 6393aebc3c35e200 RBX: 1ffff92000000fb0 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc90000007df0 R08: dffffc0000000000 R09: ffffed1017305499
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000000fac R14: ffffc90000007d80 R15: 0000000000000246
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
Code: 44 f5 f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 64 03 fc f6 0f 1f 44 00 00 e8 ba 40 f5 f6 0f 00 2d 03 14 b2 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 2b c2 4c f7
RSP: 0018:ffffffff8ce07b20 EFLAGS: 000002d3
RAX: ffffffff8a955316 RBX: 0000000000000000 RCX: ffffffff8cebd800
RDX: 0000000000000000 RSI: ffffffff8aec0240 RDI: ffffffff8b3d4760
RBP: ffffffff8ce07bb0 R08: ffffffff8a9552f8 R09: fffffbfff19d7b01
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff19c0f64
R13: ffff888141ff8004 R14: ffffffff8ce07b40 R15: dffffc0000000000
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
 cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3ce/0x680 kernel/sched/idle.c:303
 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
 rest_init+0x2da/0x300 init/main.c:733
 arch_call_rest_init+0xa/0xa init/main.c:893
 start_kernel+0x496/0x53f init/main.c:1140
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
CPU: 1 PID: 7597 Comm: syz.0.1324 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:restore_altstack+0x13d/0x150 kernel/signal.c:4254
Code: 00 00 00 00 43 c7 44 2c 08 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 75 11 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 e8 aa 6d 33 09 66 2e 0f 1f 84 00 00 00 00 00 55 41 57
RSP: 0018:ffffc90005937e48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000040000
RDX: ffffc90012b75000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90005937e50 R08: ffffffff8157afc4 R09: fffff52000b26fbb
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90005937f58
R13: 00007f0744516b38 R14: 1ffff92000b26fd4 R15: ffff88807df9bba0
FS:  00007f07445176c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000073c99000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 __do_sys_rt_sigreturn+0x19d/0x250 arch/x86/kernel/signal.c:678
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0743775b27
Code: ff ff 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
RSP: 002b:00007f07445170f8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f0743903fa8 RCX: 00007f0743775b29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0743903fa8
RBP: 00007f0743903fa0 R08: 00007f07445176c0 R09: 00007f07445176c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0743903fac
R13: 000000000000000b R14: 00007fff49380ac0 R15: 00007fff49380ba8
 </TASK>
sched: RT throttling activated