rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=20149, q=924 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4294960560-4294950061), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g20149 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:27776 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5349 [inline]
 __schedule+0x1665/0x5590 kernel/sched/core.c:6961
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7289
 irqentry_exit+0x5e4/0x700 kernel/entry/common.c:240
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:schedule_timeout+0x163/0x2c0 kernel/time/sleep_timeout.c:103
Code: 8b 49 c7 c0 00 44 73 9a e8 7a 89 f0 f5 48 89 5c 24 50 4c 89 ef e8 bd 9d f0 f5 e8 68 a6 fe ff 4c 89 ef e8 00 af f0 f5 4c 89 ef <e8> 78 8a f0 f5 43 80 3c 3e 00 74 0c 48 c7 c7 80 12 81 8e e8 25 3a
RSP: 0018:ffffc90000157ac0 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 00000000ffffbcae RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8e22d498 RDI: ffffc90000157b00
RBP: ffffc90000157bd0 R08: ffffffff9053fbf7 R09: 1ffffffff20a7f7e
R10: dffffc0000000000 R11: fffffbfff20a7f7f R12: 1ffff9200002af5c
R13: ffffc90000157b00 R14: 1ffffffff1d02250 R15: dffffc0000000000
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 6564 Comm: syz.0.36 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217
Code: de 5b e9 e3 00 5f 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d d8 c1 9c 11 <65> 8b 15 f9 c1 9c 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900038c7a38 EFLAGS: 00000046
RAX: ffffffff81b7598a RBX: 0000000000000000 RCX: ffff88802935db80
RDX: ffff88802935db80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900038c7af0 R08: ffffffff81b41745 R09: ffffffff9a734448
R10: 0000000000000003 R11: ffffffff8174d7e0 R12: 0000000000000020
R13: dffffc0000000000 R14: 1ffff92000718f4c R15: 00000000000000bc
FS:  00007f33f93be6c0(0000) GS:ffff888124ee6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000007112a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 clockevents_program_event+0x3ba/0x4b0 kernel/time/clockevents.c:370
 hrtimer_start_range_ns+0x940/0xed0 kernel/time/hrtimer.c:1490
 __posixtimer_deliver_signal kernel/time/posix-timers.c:314 [inline]
 posixtimer_deliver_signal+0x1ce/0x410 kernel/time/posix-timers.c:340
 dequeue_signal+0x249/0x370 kernel/signal.c:660
 get_signal+0x55d/0x1330 kernel/signal.c:2916
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33f859c627
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007f33f93be0e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f33f8815fa8 RCX: 00007f33f859c629
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f33f8815fa8
RBP: 00007f33f8815fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33f8816038 R14: 00007fff2e0ebbf0 R15: 00007fff2e0ebcd8
 </TASK>