rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=0054/1/0x4000000000000000 softirq=9697/9698 fqs=22
	(t=10501 jiffies g=8449 q=415 ncpus=2)
rcu: rcu_preempt kthread starved for 10455 jiffies! g8449 f0x0 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:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6561
 schedule+0xbf/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 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: 4256 Comm: syz.0.139 Not tainted 6.1.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:preempt_count_sub+0x0/0x160 kernel/sched/core.c:5732
Code: ff 48 c7 c1 28 f2 99 8e 80 e1 07 80 c1 03 38 c1 7c 80 48 c7 c7 28 f2 99 8e e8 5c c0 83 00 e9 6f ff ff ff 0f 1f 80 00 00 00 00 <41> 56 53 89 fb 48 c7 c0 60 11 f3 91 48 c1 e8 03 49 be 00 00 00 00
RSP: 0018:ffffc900001e0a98 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888073ea8000 RCX: ffffffff91f31103
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900001e0ba8 R08: dffffc0000000000 R09: ffffed100e7d5001
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c15c
R13: 0000000000000000 R14: ffff888073ea8018 R15: 0000000000000000
FS:  00007f3dc580e6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000055996000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 try_to_wake_up+0x81a/0x12e0 kernel/sched/core.c:4233
 signal_wake_up_state kernel/signal.c:780 [inline]
 signal_wake_up include/linux/sched/signal.h:457 [inline]
 complete_signal+0x796/0xbd0 kernel/signal.c:1074
 send_sigqueue+0x44f/0x720 kernel/signal.c:2003
 posix_timer_event kernel/time/posix-timers.c:354 [inline]
 posix_timer_fn+0x186/0x390 kernel/time/posix-timers.c:380
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: a1 9d f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 9e 55 bb f6 48 89 df e8 06 93 bc f6 e8 91 21 e2 f6 fb bf 01 00 00 00 <e8> 56 26 af f6 65 8b 05 77 32 53 75 85 c0 74 02 5b c3 e8 24 56 51
RSP: 0018:ffffc9000314fb30 EFLAGS: 00000286
RAX: 9e82b724db770100 RBX: ffff8880276865c0 RCX: ffffffff91f31103
RDX: dffffc0000000000 RSI: ffffffff8b0c0240 RDI: 0000000000000001
RBP: ffffc9000314fc70 R08: dffffc0000000000 R09: ffffed1004ed0cb9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004ed0d4b
R13: 000000001c000004 R14: 0000000000000021 R15: ffff888027686a58
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x154b/0x17d0 kernel/signal.c:2865
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 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+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3dc4977297
Code: ff ff 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
RSP: 002b:00007f3dc580e0f8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f3dc4b05f88 RCX: 00007f3dc4977299
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3dc4b05f88
RBP: 00007f3dc4b05f80 R08: 00007f3dc580e6c0 R09: 00007f3dc580e6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3dc4b05f8c
R13: 000000000000000b R14: 00007ffeba9031a0 R15: 00007ffeba903288
 </TASK>
CPU: 0 PID: 4249 Comm: syz.4.135 Not tainted 6.1.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x37/0x230 kernel/entry/common.c:118
Code: 49 89 fe 48 8b 7c 24 30 e8 f6 fa ff ff 0f 1f 44 00 00 0f 1f 44 00 00 e8 17 7f ec f6 e8 92 7d ec f6 fb 65 4c 8b 3d 79 8e 5d 75 <49> 8b 5f 08 f6 c3 3f 0f 84 ad 00 00 00 f6 c3 20 74 17 4c 89 f7 e8
RSP: 0018:ffffc9000579fef8 EFLAGS: 00000282
RAX: d47eb1a3307e7e00 RBX: ffffc9000579ff30 RCX: ffffffff91f31103
RDX: dffffc0000000000 RSI: ffffffff8b0c0240 RDI: ffffffff8b5d5ba0
RBP: ffffc9000579ff48 R08: dffffc0000000000 R09: fffffbfff1d337ae
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000027 R14: ffffc9000579ff58 R15: ffff888016370000
FS:  00007f09815ff6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000079dd5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 do_syscall_64+0x1e/0xb0 arch/x86/entry/common.c:77
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f098176e2e7
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d b2 e5 cc 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 43 f5 fb ff 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 66 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007f09815feb08 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007f09815fec70 RCX: 00007f098176e2e7
RDX: 00007f09815feb40 RSI: 00007f09815fec70 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f09815ff6c0 R09: 00007f09815ff6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f098190613c
R13: 000000000000006e R14: 00007ffd3d40ce40 R15: 00007ffd3d40cf28
 </TASK>
vkms_vblank_simulate: vblank timer overrun