rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=ebdc/1/0x4000000000000000 softirq=46139/46139 fqs=0
	(detected by 0, t=10502 jiffies, g=66057, q=681 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12029 Comm: syz.1.2430 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x7b/0x290 mm/kasan/generic.c:189
Code: 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83 fd 10 7f 26 48 85 ed 0f 84 3a 01 00 00 49 f7 d2 49 01 da 41 80 39 00 <0f> 85 c4 01 00 00 49 ff c1 49 ff c2 75 ee e9 1d 01 00 00 45 89 cf
RSP: 0018:ffffc900001e09d8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffffffff225724c RCX: ffffffff816ac6ff
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff912b9260
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff225724c
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff888028c74658
R13: ffff888028c73b80 R14: fffffbfff225724d R15: 1ffff1100518e8df
FS:  00007f8415ab36c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003c80 CR3: 000000007df0d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xcbf/0x1f80 kernel/locking/lockdep.c:5019
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __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_deactivate+0x63/0x380 lib/debugobjects.c:753
 debug_hrtimer_deactivate kernel/time/hrtimer.c:426 [inline]
 debug_deactivate+0x1d/0x280 kernel/time/hrtimer.c:482
 __run_hrtimer kernel/time/hrtimer.c:1657 [inline]
 __hrtimer_run_queues+0x334/0xe50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:noop_dirty_folio+0x0/0x2c0 mm/page-writeback.c:2561
Code: e8 85 18 d0 ff e9 3a fc ff ff e8 7b 18 d0 ff e9 87 fc ff ff e8 71 18 d0 ff e9 14 fd ff ff e8 67 18 d0 ff e9 a4 fd ff ff 66 90 <55> 41 57 41 56 41 55 41 54 53 49 89 f6 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90004637a88 EFLAGS: 00000282
RAX: ffffffff81ba9160 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffffc9000587a000 RSI: ffffea0000c5fc80 RDI: ffff888057f7af98
RBP: 0000000000000000 R08: ffffffff81babad6 R09: fffff9400018bf91
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0000c5fc88
R13: ffffea0000c5fc80 R14: 0000000000001000 R15: ffffea0000c5fc80
 shmem_write_end+0x33b/0x700 mm/shmem.c:2601
 generic_perform_write+0x3e9/0x5e0 mm/filemap.c:3856
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973
 generic_file_write_iter+0xab/0x310 mm/filemap.c:4005
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x857/0xbc0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8414b8bc1f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f8415ab2df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f8414b8bc1f
RDX: 0000000001000000 RSI: 00007f840a3f7000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000559d
R10: 0000200000013682 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f8415ab2ef0 R14: 00007f8415ab2eb0 R15: 00007f840a3f7000
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g66057 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=23761
rcu: rcu_preempt kthread starved for 10502 jiffies! g66057 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:25592 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5243 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6560
 schedule+0xbf/0x180 kernel/sched/core.c:6636
 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: 12029 Comm: syz.1.2430 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lock_acquire+0x102/0x5a0 kernel/locking/lockdep.c:5635
Code: 06 48 8d 3c c5 68 b4 a0 8e be 08 00 00 00 e8 45 58 77 00 48 0f a3 1d 15 00 36 0d 73 0d e8 96 e1 08 00 84 c0 0f 84 b9 02 00 00 <48> c7 c0 34 e9 a0 8e 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 dd 02
RSP: 0018:ffffc900001e0ac0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816ab44b
RDX: 0000000000000000 RSI: ffffffff8b5f6f60 RDI: ffffffff8b5f6f20
RBP: ffffc900001e0c08 R08: dffffc0000000000 R09: fffffbfff1d4168e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c160
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f8415ab36c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003c80 CR3: 000000007df0d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __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+0x68/0x4e0 lib/debugobjects.c:698
 debug_hrtimer_activate kernel/time/hrtimer.c:421 [inline]
 debug_activate kernel/time/hrtimer.c:476 [inline]
 enqueue_hrtimer+0x30/0x410 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1706 [inline]
 __hrtimer_run_queues+0x728/0xe50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:noop_dirty_folio+0x0/0x2c0 mm/page-writeback.c:2561
Code: e8 85 18 d0 ff e9 3a fc ff ff e8 7b 18 d0 ff e9 87 fc ff ff e8 71 18 d0 ff e9 14 fd ff ff e8 67 18 d0 ff e9 a4 fd ff ff 66 90 <55> 41 57 41 56 41 55 41 54 53 49 89 f6 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90004637a88 EFLAGS: 00000282
RAX: ffffffff81ba9160 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffffc9000587a000 RSI: ffffea0000c5fc80 RDI: ffff888057f7af98
RBP: 0000000000000000 R08: ffffffff81babad6 R09: fffff9400018bf91
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0000c5fc88
R13: ffffea0000c5fc80 R14: 0000000000001000 R15: ffffea0000c5fc80
 shmem_write_end+0x33b/0x700 mm/shmem.c:2601
 generic_perform_write+0x3e9/0x5e0 mm/filemap.c:3856
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973
 generic_file_write_iter+0xab/0x310 mm/filemap.c:4005
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x857/0xbc0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8414b8bc1f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f8415ab2df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f8414b8bc1f
RDX: 0000000001000000 RSI: 00007f840a3f7000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000559d
R10: 0000200000013682 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f8415ab2ef0 R14: 00007f8415ab2eb0 R15: 00007f840a3f7000
 </TASK>
vkms_vblank_simulate: vblank timer overrun