------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:28!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 20815 Comm: kworker/u8:36 Not tainted 6.16.0-rc6-syzkaller-01669-g8aad37d16cff #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:__phys_addr+0x16b/0x180 arch/x86/mm/physaddr.c:28
Code: c9 ad 00 e9 45 ff ff ff e8 12 bb 4b 00 48 c7 c7 10 f7 fa 8d 48 89 de 4c 89 f2 e8 80 68 81 03 e9 4d ff ff ff e8 f6 ba 4b 00 90 <0f> 0b e8 ee ba 4b 00 90 0f 0b e8 e6 ba 4b 00 90 0f 0b 0f 1f 00 90
RSP: 0018:ffffc90000a08b58 EFLAGS: 00010246
RAX: ffffffff81746f5a RBX: 00007780ffff0000 RCX: ffff88807d5e8000
RDX: 0000000000000100 RSI: 000000017fff0000 RDI: 00007780ffff0000
RBP: ffffc90000a08e30 R08: 0000000000000000 R09: ffffffff81a8c254
R10: dffffc0000000000 R11: ffffffff89f5b990 R12: ffffffff89f5b990
R13: ffffffff81a8c254 R14: 000000017fff0000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125d15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d2d620f98 CR3: 000000007d2ac000 CR4: 00000000003526f0
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:2576 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832
 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:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6619
Code: 65 48 8b 05 6d 4f 02 11 48 3b 44 24 10 0f 84 26 fe ff ff e8 2d c7 d1 09 e8 58 c8 d1 09 41 f7 c7 00 02 00 00 74 bd fb 40 84 ed <75> bc eb cd 90 0f 0b 90 e9 19 ff ff ff 90 0f 0b 90 e9 2a ff ff ff
RSP: 0018:ffffc9000d99f578 EFLAGS: 00000246
RAX: 81d22b9b47949100 RBX: ffff8880772b9298 RCX: 81d22b9b47949100
RDX: ffffffff93646318 RSI: ffffffff8d9b2105 RDI: ffffffff8be28c40
RBP: ffff8880772b9200 R08: 0000000000000000 R09: ffffffff81ab4a78
R10: dffffc0000000000 R11: fffffbfff1f445df R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000203
 __qdisc_destroy+0x166/0x420 net/sched/sch_generic.c:1081
 netdev_for_each_tx_queue include/linux/netdevice.h:2657 [inline]
 dev_shutdown+0x93/0x440 net/sched/sch_generic.c:1492
 unregister_netdevice_many_notify+0xe0f/0x1ff0 net/core/dev.c:12128
 unregister_netdevice_many net/core/dev.c:12203 [inline]
 default_device_exit_batch+0x819/0x890 net/core/dev.c:12707
 ops_exit_list net/core/net_namespace.c:204 [inline]
 ops_undo_list+0x522/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__phys_addr+0x16b/0x180 arch/x86/mm/physaddr.c:28
Code: c9 ad 00 e9 45 ff ff ff e8 12 bb 4b 00 48 c7 c7 10 f7 fa 8d 48 89 de 4c 89 f2 e8 80 68 81 03 e9 4d ff ff ff e8 f6 ba 4b 00 90 <0f> 0b e8 ee ba 4b 00 90 0f 0b e8 e6 ba 4b 00 90 0f 0b 0f 1f 00 90
RSP: 0018:ffffc90000a08b58 EFLAGS: 00010246
RAX: ffffffff81746f5a RBX: 00007780ffff0000 RCX: ffff88807d5e8000
RDX: 0000000000000100 RSI: 000000017fff0000 RDI: 00007780ffff0000
RBP: ffffc90000a08e30 R08: 0000000000000000 R09: ffffffff81a8c254
R10: dffffc0000000000 R11: ffffffff89f5b990 R12: ffffffff89f5b990
R13: ffffffff81a8c254 R14: 000000017fff0000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125d15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d2d620f98 CR3: 000000007d2ac000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	65 48 8b 05 6d 4f 02 	mov    %gs:0x11024f6d(%rip),%rax        # 0x11024f75
   7:	11
   8:	48 3b 44 24 10       	cmp    0x10(%rsp),%rax
   d:	0f 84 26 fe ff ff    	je     0xfffffe39
  13:	e8 2d c7 d1 09       	call   0x9d1c745
  18:	e8 58 c8 d1 09       	call   0x9d1c875
  1d:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  24:	74 bd                	je     0xffffffe3
  26:	fb                   	sti
  27:	40 84 ed             	test   %bpl,%bpl
* 2a:	75 bc                	jne    0xffffffe8 <-- trapping instruction
  2c:	eb cd                	jmp    0xfffffffb
  2e:	90                   	nop
  2f:	0f 0b                	ud2
  31:	90                   	nop
  32:	e9 19 ff ff ff       	jmp    0xffffff50
  37:	90                   	nop
  38:	0f 0b                	ud2
  3a:	90                   	nop
  3b:	e9 2a ff ff ff       	jmp    0xffffff6a