__do_sys_sendmmsg net/socket.c:2582 [inline]
 __se_sys_sendmmsg net/socket.c:2579 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at lib/ref_tracker.c:38 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
WARNING: CPU: 0 PID: 0 at lib/ref_tracker.c:38 ref_tracker_dir_exit.cold+0x137/0x1e3 lib/ref_tracker.c:37
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-next-20220112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ref_tracker_dir_exit.cold+0x137/0x1e3 lib/ref_tracker.c:38
Code: 4c 89 ef e8 47 eb 9d f8 4c 8b 3c 24 4c 39 fd 49 8b 07 0f 85 b5 00 00 00 e8 62 fd 52 f8 48 8b 74 24 10 4c 89 e7 e8 a5 28 37 00 <0f> 0b e9 21 58 e6 fa 4c 89 ff e8 16 eb 9d f8 e9 d4 fe ff ff e8 fc
RSP: 0018:ffffc90000007db8 EFLAGS: 00010202
RAX: 0000000000000101 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000102 RSI: 0000000000000102 RDI: 0000000000000001
RBP: ffff88807aa81c18 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ea828 R11: 0000000000088078 R12: ffff88807aa81bd0
R13: ffff88807aa81c18 R14: ffff88807aa81c18 R15: ffff88807aa81c18
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54eb7f3000 CR3: 000000001be04000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __put_net+0x15/0x70 net/core/net_namespace.c:640
 put_net include/net/net_namespace.h:268 [inline]
 put_net_track include/net/net_namespace.h:342 [inline]
 __sk_destruct+0x5f7/0x710 net/core/sock.c:2042
 rcu_do_batch kernel/rcu/tree.c:2527 [inline]
 rcu_core+0x7b8/0x1540 kernel/rcu/tree.c:2778
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:551
Code: 89 de e8 3d df 1b f8 84 db 75 ac e8 54 db 1b f8 e8 2f 23 22 f8 eb 0c e8 48 db 1b f8 0f 00 2d b1 7c b5 00 e8 3c db 1b f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 b7 dd 1b f8 48 85 db
RSP: 0018:ffffffff8b807d60 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8b8bc6c0 RSI: ffffffff895c84d4 RDI: 0000000000000000
RBP: ffff888013b9e864 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ea828 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888013b9e800 R14: ffff888013b9e864 R15: ffff88801803c004
 acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:687
 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x3e8/0x590 kernel/sched/idle.c:306
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
 start_kernel+0x47a/0x49b init/main.c:1141
 secondary_startup_64_no_verify+0xc3/0xcb
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 de                	mov    %ebx,%esi
   2:	e8 3d df 1b f8       	callq  0xf81bdf44
   7:	84 db                	test   %bl,%bl
   9:	75 ac                	jne    0xffffffb7
   b:	e8 54 db 1b f8       	callq  0xf81bdb64
  10:	e8 2f 23 22 f8       	callq  0xf8222344
  15:	eb 0c                	jmp    0x23
  17:	e8 48 db 1b f8       	callq  0xf81bdb64
  1c:	0f 00 2d b1 7c b5 00 	verw   0xb57cb1(%rip)        # 0xb57cd4
  23:	e8 3c db 1b f8       	callq  0xf81bdb64
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	9c                   	pushfq <-- trapping instruction
  2b:	5b                   	pop    %rbx
  2c:	81 e3 00 02 00 00    	and    $0x200,%ebx
  32:	fa                   	cli
  33:	31 ff                	xor    %edi,%edi
  35:	48 89 de             	mov    %rbx,%rsi
  38:	e8 b7 dd 1b f8       	callq  0xf81bddf4
  3d:	48 85 db             	test   %rbx,%rbx