rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=6c34/1/0x4000000000000000 softirq=41682/41685 fqs=5229
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1596468          0            0
rcu: 	cputime:    12088      40400            7   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=39169 q=2455 ncpus=2)
CPU: 1 UID: 0 PID: 10404 Comm: syz.0.2034 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:taprio_dequeue_tc_priority+0x26c/0x750 net/sched/sch_taprio.c:792
Code: 85 33 02 00 00 41 8b 5d 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 39 02 00 00 45 8b 36 89 df 44 89 f6 e8 c4 be 3a f8 <44> 39 f3 73 15 48 8b 5c 24 10 48 85 db 0f 85 7a 04 00 00 e8 ec bc
RSP: 0018:ffffc90000a08b48 EFLAGS: 00000246
RAX: ffffffff8985a1ec RBX: 0000000000000009 RCX: 0000000000000100
RDX: ffff8880248c1e00 RSI: 0000000000000010 RDI: 0000000000000009
RBP: 1ffff1100adf1872 R08: 0000000000000000 R09: ffffffff8984f816
R10: 0000000000000001 R11: ffffffff89786710 R12: dffffc0000000000
R13: ffff888056f8c390 R14: 0000000000000010 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125d52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb76f2e56c0 CR3: 000000000df38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:294 [inline]
 qdisc_restart net/sched/sch_generic.c:399 [inline]
 __qdisc_run+0x239/0x15f0 net/sched/sch_generic.c:417
 qdisc_run+0xc2/0x230 include/net/pkt_sched.h:127
 net_tx_action+0x7c9/0x980 net/core/dev.c:5624
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:_compound_head include/linux/page-flags.h:280 [inline]
RIP: 0010:free_pages_and_swap_cache+0x148/0x520 mm/swap_state.c:255
Code: e0 fc 48 89 44 24 10 4c 8d 70 08 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 88 c4 08 00 <4d> 8b 36 4c 89 f6 48 83 e6 01 31 ff e8 e7 51 a5 ff 4c 89 f0 48 83
RSP: 0018:ffffc9001a3770a0 EFLAGS: 00000246
RAX: 1ffffd4000323931 RBX: ffff8880488188d0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000001f
RBP: ffffc9001a377328 R08: ffffea000191c947 R09: 1ffffd4000323928
R10: dffffc0000000000 R11: fffff94000323929 R12: 1ffff1100910311a
R13: ffffea000191c980 R14: ffffea000191c988 R15: 0000000000000118
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404
 zap_pte_range mm/memory.c:1774 [inline]
 zap_pmd_range mm/memory.c:1827 [inline]
 zap_pud_range mm/memory.c:1856 [inline]
 zap_p4d_range mm/memory.c:1877 [inline]
 unmap_page_range+0x38fd/0x41c0 mm/memory.c:1898
 unmap_single_vma mm/memory.c:1941 [inline]
 unmap_vmas+0x399/0x580 mm/memory.c:1985
 exit_mmap+0x248/0xb50 mm/mmap.c:1284
 __mmput+0x118/0x420 kernel/fork.c:1121
 exit_mm+0x1da/0x2c0 kernel/exit.c:581
 do_exit+0x640/0x22e0 kernel/exit.c:943
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd23eb8e929
Code: Unable to access opcode bytes at 0x7fd23eb8e8ff.
RSP: 002b:00007fd23fa910e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fd23edb5fa8 RCX: 00007fd23eb8e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd23edb5fac
RBP: 00007fd23edb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007fd23edb5fac
R13: 0000000000000000 R14: 00007fd23eedf940 R15: 00007fd23eedfa28
 </TASK>
sched: DL replenish lagged too much
vkms_vblank_simulate: vblank timer overrun
vkms_vblank_simulate: vblank timer overrun
vkms_vblank_simulate: vblank timer overrun