rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=6869, q=53 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294954743-4294944241), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g6869 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:27528 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5814 Comm: syz-executor218 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:trace_hardirqs_on_prepare+0xb/0x30 kernel/trace/trace_preemptirq.c:44
Code: 24 a0 00 00 00 75 0f 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f4 1f e1 08 0f 1f 40 00 f3 0f 1e fa 65 8b 05 8d 52 77 7e <85> c0 74 14 48 8b 3c 24 e8 18 00 00 00 65 c7 05 75 52 77 7e 00 00
RSP: 0018:ffffc9000481ff08 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffc9000481ff58 RCX: ffff88802aec5a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000481ff48 R08: ffff88802aec5a07 R09: 1ffff110055d8b40
R10: dffffc0000000000 R11: ffffed10055d8b41 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000481ff58 R15: 000000000000000f
FS:  000055559457b3c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13ebd43be0 CR3: 000000002c29a000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __exit_to_user_mode kernel/entry/common.c:136 [inline]
 syscall_exit_to_user_mode+0x1f/0x50 kernel/entry/common.c:304
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f13ebd522d0
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a bf 02 00 e8 75 ec fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007fff2343c938 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f13ebd2c289
RDX: 00007fff2343c940 RSI: 00007fff2343ca70 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f13ebce4990 R09: 00007f13ebce4990
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f13ebd7c178
R13: 00007f13ebd82e3c R14: 00007fff2343cf30 R15: 0000000000000000
 </TASK>