rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=8bcc/1/0x4000000000000000 softirq=4011/4011 fqs=0
rcu: 	(detected by 1, t=10002 jiffies, g=9265, q=3085 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7481 Comm: syz.8.2253 Not tainted 6.12.38-syzkaller-g3f3a5c5e782d #0 c9247809a66a5ebb3467d1c2e99b1dedbd707993
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:_raw_spin_lock_irqsave+0x44/0x150 kernel/locking/spinlock.c:161
Code: 00 00 48 89 fb 65 48 8b 04 25 28 00 00 00 48 89 44 24 60 49 bc 00 00 00 00 00 fc ff df 4c 8d 7c 24 20 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 31 1a e9 86 48 c7 44 24 10 50 cb 8d 85 49 89 e5 49
RSP: 0018:ffffc9000e7afc40 EFLAGS: 00000082
RAX: 5b4b344fefde2100 RBX: ffffffff889e9040 RCX: ffff88814bed9300
RDX: 0000000000000000 RSI: 0000000000000806 RDI: ffffffff889e9040
RBP: ffffc9000e7afce8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001cf5f8c R12: dffffc0000000000
R13: ffff88813de0fc18 R14: ffff88813de0fc24 R15: ffffc9000e7afc60
FS:  000055557534c500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe307d6e78 CR3: 0000000140494000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 vga_put drivers/pci/vgaarb.c:547 [inline]
 vga_arb_release+0x20f/0x950 drivers/pci/vgaarb.c:1455
 __fput+0x1fb/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3193f8ebe9
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:00007ffca02edd68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000002c791 RCX: 00007f3193f8ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f31941b7da0 R08: 0000000000000001 R09: 00000028a02ee05f
R10: 0000001b2fd20000 R11: 0000000000000246 R12: 00007f31941b5fac
R13: 00007f31941b5fa0 R14: ffffffffffffffff R15: 00007ffca02ede80
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10001 jiffies! g9265 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=5274
rcu: rcu_preempt kthread starved for 10002 jiffies! g9265 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:0     pid:18    tgid:18    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_timeout+0x139/0x3a0 kernel/time/timer.c:2619
 rcu_gp_fqs_loop+0x2f2/0x12f0 kernel/rcu/tree.c:2053
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:2255
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>