vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:28!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 17383 Comm: syz.8.3185 Not tainted 6.16.0-rc2-next-20250617-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__phys_addr+0x16b/0x180 arch/x86/mm/physaddr.c:28
Code: 36 b0 00 e9 45 ff ff ff e8 b2 0a 4c 00 48 c7 c7 50 f3 fa 8d 48 89 de 4c 89 f2 e8 a0 85 84 03 e9 4d ff ff ff e8 96 0a 4c 00 90 <0f> 0b e8 8e 0a 4c 00 90 0f 0b e8 86 0a 4c 00 90 0f 0b 0f 1f 00 90
RSP: 0018:ffffc90000007b58 EFLAGS: 00010246
RAX: ffffffff817460da RBX: 00007780fffd0000 RCX: ffff888029d88000
RDX: 0000000000000100 RSI: 000000017ffd0000 RDI: 00007780fffd0000
RBP: ffffc90000007e30 R08: 0000000000000000 R09: ffffffff81a8bef4
R10: dffffc0000000000 R11: ffffffff89f0c5a0 R12: ffffffff89f0c5a0
R13: ffffffff81a8bef4 R14: 000000017ffd0000 R15: dffffc0000000000
FS:  00007f966e1b86c0(0000) GS:ffff888125c40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd749fbfa0 CR3: 000000007ccbe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 virt_to_folio include/linux/mm.h:1178 [inline]
 kfree+0x77/0x440 mm/slub.c:4834
 in_dev_free_rcu+0x49/0x60 net/ipv4/devinet.c:245
 rcu_do_batch kernel/rcu/tree.c:2582 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2838
 handle_softirqs+0x283/0x870 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:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 1b cb ff 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900039c74a0 EFLAGS: 00000206
RAX: 260a9930c3264100 RBX: 0000000000000000 RCX: 260a9930c3264100
RDX: 0000000000000000 RSI: ffffffff8db79595 RDI: ffffffff8be2efe0
RBP: ffffffff8a178752 R08: 0000000000000000 R09: ffffffff8a178752
R10: ffffc900039c7620 R11: fffff52000738ec9 R12: 0000000000000000
R13: ffff88805e0c9e98 R14: 0000000000000001 R15: 0000000000000246
 __mutex_lock_common kernel/locking/mutex.c:602 [inline]
 __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:747
 __unix_dgram_recvmsg+0x1e2/0xde0 net/unix/af_unix.c:2500
 sock_recvmsg_nosec+0x186/0x1c0 net/socket.c:1017
 ____sys_recvmsg+0x3aa/0x460 net/socket.c:2784
 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2828
 do_recvmmsg+0x307/0x770 net/socket.c:2923
 __sys_recvmmsg net/socket.c:2997 [inline]
 __do_sys_recvmmsg net/socket.c:3020 [inline]
 __se_sys_recvmmsg net/socket.c:3013 [inline]
 __x64_sys_recvmmsg+0x190/0x240 net/socket.c:3013
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f966d38e929
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:00007f966e1b8038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f966d5b6080 RCX: 00007f966d38e929
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f966d410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f966d5b6080 R15: 00007ffcc7bd3238
 </TASK>
Modules linked in:
vkms_vblank_simulate: vblank timer overrun
---[ end trace 0000000000000000 ]---
RIP: 0010:__phys_addr+0x16b/0x180 arch/x86/mm/physaddr.c:28
Code: 36 b0 00 e9 45 ff ff ff e8 b2 0a 4c 00 48 c7 c7 50 f3 fa 8d 48 89 de 4c 89 f2 e8 a0 85 84 03 e9 4d ff ff ff e8 96 0a 4c 00 90 <0f> 0b e8 8e 0a 4c 00 90 0f 0b e8 86 0a 4c 00 90 0f 0b 0f 1f 00 90
RSP: 0018:ffffc90000007b58 EFLAGS: 00010246
RAX: ffffffff817460da RBX: 00007780fffd0000 RCX: ffff888029d88000
RDX: 0000000000000100 RSI: 000000017ffd0000 RDI: 00007780fffd0000
RBP: ffffc90000007e30 R08: 0000000000000000 R09: ffffffff81a8bef4
R10: dffffc0000000000 R11: ffffffff89f0c5a0 R12: ffffffff89f0c5a0
R13: ffffffff81a8bef4 R14: 000000017ffd0000 R15: dffffc0000000000
FS:  00007f966e1b86c0(0000) GS:ffff888125c40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd749fbfa0 CR3: 000000007ccbe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	9c                   	pushf
   5:	8f 44 24 30          	pop    0x30(%rsp)
   9:	f7 44 24 30 00 02 00 	testl  $0x200,0x30(%rsp)
  10:	00
  11:	0f 85 cd 00 00 00    	jne    0xe4
  17:	f7 44 24 08 00 02 00 	testl  $0x200,0x8(%rsp)
  1e:	00
  1f:	74 01                	je     0x22
  21:	fb                   	sti
  22:	65 48 8b 05 1b cb ff 	mov    %gs:0x10ffcb1b(%rip),%rax        # 0x10ffcb45
  29:	10
* 2a:	48 3b 44 24 58       	cmp    0x58(%rsp),%rax <-- trapping instruction
  2f:	0f 85 f2 00 00 00    	jne    0x127
  35:	48 83 c4 60          	add    $0x60,%rsp
  39:	5b                   	pop    %rbx
  3a:	41 5c                	pop    %r12
  3c:	41 5d                	pop    %r13
  3e:	41 5e                	pop    %r14