rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=11949, q=191)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294957810-4294947309), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g11949 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:28176 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11c3/0x4350 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_timer_base+0x1/0x270 kernel/time/timer.c:932
Code: fd ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 49 fd ff ff 48 89 ef e8 1e f3 55 00 e9 3c fd ff ff 66 0f 1f 84 00 00 00 00 00 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 10 48 89 f3 49 89 fe e8 87 d4
RSP: 0018:ffffc90000d47a88 EFLAGS: 00000296
RAX: b8acd301e131ff00 RBX: ffffc90000d47be0 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffffc90000d47a98 RDI: ffffc90000d47be0
RBP: 0000000000000000 R08: ffffc90000d47a3f R09: ffffc90000d47a30
R10: dffffc0000000000 R11: fffff520001a8f48 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
 __try_to_del_timer_sync+0x52/0x1f0 kernel/time/timer.c:1361
 __timer_delete_sync+0x1df/0x290 kernel/time/timer.c:1521
 timer_delete_sync kernel/time/timer.c:1576 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x18e/0x2d0 kernel/time/timer.c:2118
 rcu_gp_fqs_loop+0x2be/0x11f0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9a/0x370 kernel/rcu/tree.c:2145
 kthread+0x42e/0x520 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: 5238 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:hrtimer_forward+0x73/0x280 kernel/time/hrtimer.c:1032
Code: e8 e2 7f 10 00 4c 89 ed 4c 29 e5 0f 88 56 01 00 00 4c 8d 63 38 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 df 01 00 00 45 0f b6 24 24 44 89 e6 83 e6 01 31 ff e8
RSP: 0000:ffffc9000307fb08 EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff888077e84f60 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000004c68 RDI: 0000000000000000
RBP: 0000000000004c68 R08: ffffffff8d8aeaef R09: 1ffffffff1b15d5d
R10: dffffc0000000000 R11: fffffbfff1b15d5e R12: ffff888077e84f98
R13: 18c3a710b1500268 R14: 1ffff1100efd09ef R15: 0000000000008000
FS:  00007fa6406776c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000005cf93000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 common_hrtimer_rearm+0x8c/0x110 kernel/time/posix-timers.c:303
 posixtimer_rearm+0x12a/0x340 kernel/time/posix-timers.c:329
 dequeue_signal+0x174/0x440 kernel/signal.c:696
 get_signal+0x823/0x12e0 kernel/signal.c:2782
 arch_do_signal_or_restart+0xe6/0x12a0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0033:0x7fa641013377
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:00007fa6406770e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fa64126efa8 RCX: 00007fa641013379
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa64126efa8
RBP: 00007fa64126efa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa64126f038 R14: 00007ffddd2aba00 R15: 00007ffddd2abae8
 </TASK>
sched: RT throttling activated