rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=06b/1/0x4000000000000000 softirq=8889/8898 fqs=0 
	(t=10500 jiffies g=10209 q=75)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g10209 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3159
rcu: rcu_preempt kthread starved for 10500 jiffies! g10209 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26816 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: 4798 Comm: syz-executor.1 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_timer+0x25/0x3b0 kernel/time/posix-timers.c:627
Code: 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 49 89 f6 89 fb e8 a8 55 0f 00 31 ff 89 de e8 ff 58 0f 00 89 5c 24 04 <85> db 78 2e e8 e2 bb fa ff e8 2d 75 00 00 e8 78 c5 cd 08 89 c3 31
RSP: 0018:ffffc90002f7f9c8 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888078ab3b80
RDX: ffff888078ab3b80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002f7faf0 R08: ffffffff81712f41 R09: ffffed100ef30001
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90002f7fa80
R13: 1ffff920005eff4c R14: ffffc90002f7fa80 R15: ffff888078ab44b0
FS:  00007f950242c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f950242bd80 CR3: 0000000062e0c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 posixtimer_rearm+0xbe/0x3f0 kernel/time/posix-timers.c:323
 dequeue_signal+0x1ed/0x520 kernel/signal.c:696
 get_signal+0x52e/0x14e0 kernel/signal.c:2781
 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: 0033:0x7f95030aace7
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:00007f950242c178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f95031c9f88 RCX: 00007f95030aace9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f95031c9f88
RBP: 00007f95031c9f80 R08: 00007f950242c6c0 R09: 00007f950242c6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f95031c9f8c
R13: 000000000000000b R14: 00007ffdb1948bf0 R15: 00007ffdb1948cd8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 4799 Comm: syz-executor.3 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x55b/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:__syscall_enter_from_user_work kernel/entry/common.c:93 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x37/0x240 kernel/entry/common.c:114
Code: 49 89 fe 48 8b 7c 24 30 e8 46 f6 ff ff e9 8d 01 00 00 e9 91 01 00 00 e8 f7 0a 48 f7 e8 e2 08 48 f7 fb 65 4c 8b 3d 69 75 c3 75 <49> 8b 5f 08 f6 c3 3f 0f 84 ce 00 00 00 f6 c3 20 74 17 4c 89 f7 e8
RSP: 0018:ffffc90002f6fef8 EFLAGS: 00000282
RAX: 6107f2530e4d6a00 RBX: ffffc90002f6ff30 RCX: ffffffff96a8ff03
RDX: dffffc0000000000 RSI: ffffffff8aab2b80 RDI: ffffffff8af9f000
RBP: ffffc90002f6ff48 R08: ffffffff81870360 R09: fffffbfff1c14c0e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000027 R14: ffffc90002f6ff58 R15: ffff888025895940
 do_syscall_64+0x1e/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc2d42e3467
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d f2 03 c5 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 b3 68 fd ff 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 66 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007fc2d3666b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007fc2d3666cf0 RCX: 00007fc2d42e3467
RDX: 00007fc2d3666bc0 RSI: 00007fc2d3666cf0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007fc2d36676c0 R09: 00007fc2d36676c0
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fc2d4404f8c
R13: 000000000000000b R14: 00007fff89eb2fa0 R15: 00007fff89eb3088
 </TASK>
sched: RT throttling activated