rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=24289, q=623 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294971214-4294960712), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g24289 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:27968 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5354 [inline]
 __schedule+0x165c/0x5520 kernel/sched/core.c:6966
 __schedule_loop kernel/sched/core.c:7049 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7064
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 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+0x514/0xb70 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: 0 UID: 0 PID: 6827 Comm: vhost-6826 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:lock_is_held_type+0x106/0x150 kernel/locking/lockdep.c:5945
Code: 19 00 00 b8 ff ff ff ff 65 0f c1 05 44 ee a5 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 0b e9 02 00 cc 90 0f 0b 90 48 c7
RSP: 0018:ffffc9000416f9d0 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e4db9ce RDI: ffffffff8c4a9d60
RBP: 00000000ffffffff R08: ffffffff82176f5f R09: ffff888058c50f78
R10: dffffc0000000000 R11: ffffed100a5e92d4 R12: 0000000000000246
R13: ffff88807b569e80 R14: ffffffff8eb5d100 R15: 0000000000000001
FS:  00007fe5a00786c0(0000) GS:ffff888124fe5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582f03c0f78 CR3: 0000000076dc0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_is_held include/linux/lockdep.h:249 [inline]
 __might_resched+0x37/0x4d0 kernel/sched/core.c:8906
 __might_fault+0x76/0x130 mm/memory.c:7367
 vhost_put_used_flags drivers/vhost/vhost.c:1473 [inline]
 vhost_update_used_flags+0xff/0x2b0 drivers/vhost/vhost.c:2570
 vhost_enable_notify+0xb9/0x650 drivers/vhost/vhost.c:3222
 vhost_vsock_handle_tx_kick+0x2ea/0x10a0 drivers/vhost/vsock.c:544
 vhost_run_work_list+0x14d/0x1e0 drivers/vhost/vhost.c:454
 vhost_task_fn+0x2ef/0x4a0 kernel/vhost_task.c:49
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>