rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=101445, q=8 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295043311-4295032808), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g101445 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:26912 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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: 17061 Comm: syz.4.3179 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:do_softirq+0x1b0/0x200 kernel/softirq.c:500
Code: c7 04 37 00 00 00 00 66 43 c7 44 37 09 00 00 43 c6 44 37 0b 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 75 1f 48 8d 65 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 e8 c1 ce c8 08 41 f7 c4 00 02 00 00
RSP: 0018:ffffc900034ff9f0 EFLAGS: 00000046
RAX: 2bb74957ee3cc700 RBX: 0000000000000200 RCX: ffff888063e29dc0
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900034ffa10 R08: dffffc0000000000 R09: ffffed1027fde981
R10: ffffed1027fde981 R11: 1ffff11027fde980 R12: 0000000000000046
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200069ff2c
FS:  00007f1f241f66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f1d193000 CR3: 0000000061aec000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __local_bh_enable_ip+0x174/0x1b0 kernel/softirq.c:421
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline]
 copy_fpstate_to_sigframe+0x52d/0xcb0 arch/x86/kernel/fpu/signal.c:233
 get_sigframe arch/x86/kernel/signal.c:297 [inline]
 __setup_rt_frame arch/x86/kernel/signal.c:472 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0x610/0x1230 arch/x86/kernel/signal.c:873
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f25f8ec77
Code: 00 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1f241f5e18 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000013bd7ef RCX: 00007f1f25f8ec77
RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007f1f1bdd6000
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000054ff
R10: 00000000000003c8 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f1f241f5ef0 R14: 00007f1f241f5eb0 R15: 00007f1f1bdd6000
 </TASK>