rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=962c/1/0x4000000000000000 softirq=39015/39015 fqs=38
	(t=10501 jiffies g=52485 q=636 ncpus=2)
rcu: rcu_preempt kthread starved for 10350 jiffies! g52485 f0x0 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:25016 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 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:308
 </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: 9594 Comm: syz.3.1401 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:lockdep_hardirqs_on_prepare+0x26/0x7a0 kernel/locking/lockdep.c:4268
Code: ff ff ff 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 65 48 8b 04 25 28 00 00 00 48 89 44 24 60 <48> ba 00 00 00 00 00 fc ff df 48 c7 44 24 20 b3 8a b5 41 48 c7 44
RSP: 0018:ffffc900036ef9c0 EFLAGS: 00000086
RAX: c7a1ba2601166e00 RBX: 0000000000000000 RCX: ffff88801f151dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8aa00d46
RBP: ffffc900036efa70 R08: ffffffff815bcc76 R09: ffffed102802f381
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555556350500(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000077959000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 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: f1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e 30 d5 f6 48 89 df e8 76 6d d6 f6 e8 c1 f9 fb f6 fb bf 01 00 00 00 <e8> e6 05 c9 f6 65 8b 05 87 12 6d 75 85 c0 74 02 5b c3 e8 34 36 6b
RSP: 0018:ffffc900036efb30 EFLAGS: 00000286
RAX: c7a1ba2601166e00 RBX: ffff8880279d40c0 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc900036efc70 R08: dffffc0000000000 R09: ffffed1004f3a819
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004f3a8ab
R13: 000000001c000004 R14: 0000000000000021 R15: ffff8880279d4558
 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: 0033:0x7fa1f9375b99
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:00007ffd69d43cb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000000007b7a2 RCX: 00007fa1f9375b99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa1f9504084
RBP: 000000000007b770 R08: 0000000000000010 R09: 0000000a69d43fcf
R10: 00007ffd69d43da0 R11: 0000000000000246 R12: 00007fa1f9504084
R13: 0000000000000032 R14: 00007ffd69d43dc0 R15: 00007ffd69d43da0
 </TASK>
CPU: 1 PID: 9572 Comm: syz.1.1394 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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: f1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e 30 d5 f6 48 89 df e8 76 6d d6 f6 e8 c1 f9 fb f6 fb bf 01 00 00 00 <e8> e6 05 c9 f6 65 8b 05 87 12 6d 75 85 c0 74 02 5b c3 e8 34 36 6b
RSP: 0018:ffffc9000347fb30 EFLAGS: 00000286
RAX: 819cafe2f8f07000 RBX: ffff88807ad82500 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc9000347fc70 R08: dffffc0000000000 R09: ffffed100f5b04a1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f5b0533
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88807ad82998
FS:  0000555556dfc500(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c31dff8 CR3: 0000000064698000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 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: 0033:0x7f1f3f24cbb4
Code: 0f 82 b9 00 00 00 48 39 f2 72 6e 41 0f 11 0c 24 48 8b 77 f8 48 89 f8 48 89 eb eb 12 66 2e 0f 1f 84 00 00 00 00 00 48 8b 4b 08 <48> 83 c3 08 48 39 d1 72 f3 48 83 e8 08 48 39 f2 73 17 66 2e 0f 1f
RSP: 002b:00007ffeb76991f0 EFLAGS: 00000293
RAX: 00007f1f3eaef618 RBX: 00007f1f3ea992f0 RCX: ffffffff81799b5a
RDX: ffffffff817e16ca RSI: ffffffff817e11e1 RDI: 00007f1f3eaf6478
RBP: 00007f1f3ea69bb8 R08: 00007f1f3eab0010 R09: 0000000000000008
R10: 00000000817cd4e5 R11: 00000000817cd4e9 R12: 00007f1f3ea69bb0
R13: 000000000000001f R14: 00007f1f3e9ff008 R15: 00007f1f3f504078
 </TASK>
vkms_vblank_simulate: vblank timer overrun