rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=11121, q=173 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294962053-4294951550), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g11121 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:28440 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6960
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6167 Comm: syz.0.75 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:vcpu_enter_guest arch/x86/kvm/x86.c:11448 [inline]
RIP: 0010:vcpu_run+0x3197/0x5a80 arch/x86/kvm/x86.c:11648
Code: b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 d9 23 00 00 41 c6 86 32 0c 00 00 01 e8 f1 43 85 00 fb 48 8b 95 98 fe ff ff <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9b 23
RSP: 0018:ffffc9000434fa80 EFLAGS: 00000206
RAX: 0000000002ac126f RBX: ffff888030d5deb2 RCX: 0000000000000006
RDX: ffff888030d5ef88 RSI: ffffffff8dacf6fe RDI: ffffffff8bf2b580
RBP: ffffc9000434fc10 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9088cdd7 R11: 0000000000000000 R12: dffffc0000000000
R13: 0001000000000000 R14: ffff888030d5d280 R15: ffff888030d5d2b8
FS:  00007f213fc6f6c0(0000) GS:ffff8881249f1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000b CR3: 000000007aa5d000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kvm_arch_vcpu_ioctl_run+0xfd3/0x1860 arch/x86/kvm/x86.c:11993
 kvm_vcpu_ioctl+0x76d/0x16d0 virt/kvm/kvm_main.c:4492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f213ed8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f213fc6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f213efe5fa0 RCX: 00007f213ed8f749
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f213ee13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f213efe6038 R14: 00007f213efe5fa0 R15: 00007ffd98682358
 </TASK>