rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=19261, q=988 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294961269-4294950766), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10505 jiffies! g19261 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:27680 pid:15    tgid:15    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x15a2/0x51b0 kernel/sched/core.c:6911
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7238
 irqentry_exit+0x58e/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:debug_object_assert_init+0x0/0x370 lib/debugobjects.c:1011
Code: ff ff 48 c7 c7 a0 28 6a 8e e8 ec 7f 2f 00 48 8b 34 24 e9 dc fe ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 48 49 89 f6 48
RSP: 0018:ffffc90000147a40 EFLAGS: 00000293
RAX: ffffffff81ad4d8a RBX: ffffc90000147b00 RCX: ffff88801fa69e80
RDX: 0000000000000000 RSI: ffffffff8b6d0760 RDI: ffffc90000147b00
RBP: 0000000000000000 R08: ffffffff8f7aaaf7 R09: 1ffffffff1ef555e
R10: dffffc0000000000 R11: fffffbfff1ef555f R12: 0000000000000200
R13: ffffc90000147b00 R14: 0000000000000000 R15: ffffffff81ad51bf
 debug_timer_assert_init kernel/time/timer.c:803 [inline]
 debug_assert_init kernel/time/timer.c:848 [inline]
 __try_to_del_timer_sync+0x29/0x390 kernel/time/timer.c:1457
 __timer_delete_sync+0x163/0x1d0 kernel/time/timer.c:1621
 schedule_timeout+0x160/0x2c0 kernel/time/sleep_timeout.c:100
 rcu_gp_fqs_loop+0x312/0x11c0 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+0x51a/0xb80 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:
CPU: 1 UID: 0 PID: 6621 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:153 [inline]
RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:187 [inline]
RIP: 0010:do_syscall_64+0x51/0xf80 arch/x86/entry/syscall_64.c:90
Code: 48 8b 7d 08 48 89 7b 08 e8 dc 7d 00 00 e9 d6 02 00 00 e9 f9 02 00 00 e8 ed a1 7b f6 e8 98 a1 7b f6 fb 65 4c 8b 3d 37 cf 24 07 <4d> 8b 6f 08 41 f6 c5 bf 74 6b 41 f6 c5 20 74 0c 4c 89 f7 e8 17 e7
RSP: 0018:ffffc90003847ef0 EFLAGS: 00000202
RAX: 0000000004109489 RBX: ffffc90003847ef0 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8d7136e6 RDI: ffffffff8bc08160
RBP: ffffc90003847f38 R08: ffffffff8f7aaaf7 R09: 1ffffffff1ef555e
R10: dffffc0000000000 R11: fffffbfff1ef555f R12: 00000000000000ca
R13: 0000000000000000 R14: ffffc90003847f48 R15: ffff8880294f1e80
FS:  00007fa3894ee6c0(0000) GS:ffff88812620c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000761d2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fa38859c799
Code: 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 01 48
RSP: 002b:00007fa3894ee0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fa388815fa8 RCX: 00007fa38859c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa388815fa8
RBP: 00007fa388815fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa388816038 R14: 00007ffe7fed0860 R15: 00007ffe7fed0948
 </TASK>