rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=4ad/1/0x4000000000000000 softirq=25072/25072 fqs=0 
	(detected by 0, t=10502 jiffies, g=43469, q=475)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4174 Comm: syz-executor Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:__lock_acquire+0x134/0x1ff0 kernel/locking/lockdep.c:4915
Code: b7 15 00 00 48 89 6c 24 30 8b 6d 00 48 c7 c0 c0 af 86 96 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 bf 15 00 00 83 3d ac eb 23 15 00 <75> 09 83 fd 30 0f 83 d3 13 00 00 44 89 7c 24 2c 44 8b bc 24 d0 00
RSP: 0018:ffffc90000dd09e0 EFLAGS: 00000046
RAX: 0000000000000004 RBX: ffffffff900ebfc0 RCX: ffffffff9686af03
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff96a80b18
RBP: 0000000000000006 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff88807c808000 R14: 0000000000000000 R15: 0000000000000001
FS:  00005555781f8500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5320366c0 CR3: 0000000063d73000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x63/0x4e0 lib/debugobjects.c:694
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer+0x30/0x390 kernel/time/hrtimer.c:1084
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x6b6/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:copy_pte_range mm/memory.c:1081 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:1167 [inline]
RIP: 0010:copy_pud_range mm/memory.c:1204 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:1228 [inline]
RIP: 0010:copy_page_range+0x16df/0x4420 mm/memory.c:1301
Code: b6 04 08 84 c0 0f 85 58 0e 00 00 8b 1b bf ff 03 00 00 89 de e8 f2 33 c8 ff 81 fb ff 03 00 00 0f 87 a4 08 00 00 e8 81 30 c8 ff <48> 8b 44 24 20 4c 8d 78 08 4d 89 fc 49 c1 ec 03 48 b8 00 00 00 00
RSP: 0018:ffffc90002dc75e0 EFLAGS: 00000293
RAX: ffffffff81b8401a RBX: 0000000000000028 RCX: ffff88807c808000
RDX: 0000000000000000 RSI: 0000000000000028 RDI: 0000000000000020
RBP: ffffc90002dc7950 R08: ffffffff81b83f6d R09: fffff94000320831
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888023068840
R13: 8000000064107007 R14: 1ffff1100c708c41 R15: ffff888023068890
 dup_mmap kernel/fork.c:615 [inline]
 dup_mm kernel/fork.c:1466 [inline]
 copy_mm+0xc64/0x1370 kernel/fork.c:1518
 copy_process+0x1816/0x3ef0 kernel/fork.c:2205
 kernel_clone+0x210/0x960 kernel/fork.c:2603
 __do_sys_clone kernel/fork.c:2720 [inline]
 __se_sys_clone kernel/fork.c:2704 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2704
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb531346093
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffda03369f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb531346093
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555781f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000062058 R14: 0000000000061ffe R15: 00007ffda0336b80
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g43469 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=17348
rcu: rcu_preempt kthread starved for 10502 jiffies! g43469 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26168 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </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: 4174 Comm: syz-executor Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:_raw_spin_unlock+0x1/0x40 kernel/locking/spinlock.c:185
Code: f7 49 8d 7e 18 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 af b6 24 f7 48 83 c4 08 4c 89 f7 5b 41 5e e9 c0 2b 26 f7 53 <48> 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae dc 24 f7 48 89 df e8 06
RSP: 0018:ffffc90000dd0cb0 EFLAGS: 00000046
RAX: ffff88806144dc00 RBX: ffff88806144dc20 RCX: ffffffff8881f3c0
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888058e56ae8
RBP: ffff888058e56ae8 R08: dffffc0000000000 R09: ffffed100c289b85
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888058e56800
R13: ffff888058e56b40 R14: dffffc0000000000 R15: 180c8f7d14000000
FS:  00005555781f8500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5320366c0 CR3: 0000000063d73000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 spin_unlock include/linux/spinlock.h:403 [inline]
 advance_sched+0x68b/0x940 net/sched/sch_taprio.c:765
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:copy_pte_range mm/memory.c:1081 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:1167 [inline]
RIP: 0010:copy_pud_range mm/memory.c:1204 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:1228 [inline]
RIP: 0010:copy_page_range+0x16df/0x4420 mm/memory.c:1301
Code: b6 04 08 84 c0 0f 85 58 0e 00 00 8b 1b bf ff 03 00 00 89 de e8 f2 33 c8 ff 81 fb ff 03 00 00 0f 87 a4 08 00 00 e8 81 30 c8 ff <48> 8b 44 24 20 4c 8d 78 08 4d 89 fc 49 c1 ec 03 48 b8 00 00 00 00
RSP: 0018:ffffc90002dc75e0 EFLAGS: 00000293
RAX: ffffffff81b8401a RBX: 0000000000000028 RCX: ffff88807c808000
RDX: 0000000000000000 RSI: 0000000000000028 RDI: 0000000000000020
RBP: ffffc90002dc7950 R08: ffffffff81b83f6d R09: fffff94000320831
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888023068840
R13: 8000000064107007 R14: 1ffff1100c708c41 R15: ffff888023068890
 dup_mmap kernel/fork.c:615 [inline]
 dup_mm kernel/fork.c:1466 [inline]
 copy_mm+0xc64/0x1370 kernel/fork.c:1518
 copy_process+0x1816/0x3ef0 kernel/fork.c:2205
 kernel_clone+0x210/0x960 kernel/fork.c:2603
 __do_sys_clone kernel/fork.c:2720 [inline]
 __se_sys_clone kernel/fork.c:2704 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2704
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb531346093
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffda03369f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb531346093
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555781f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000062058 R14: 0000000000061ffe R15: 00007ffda0336b80
 </TASK>
vkms_vblank_simulate: vblank timer overrun