syzbot

team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
Oops: general protection fault, probably for non-canonical address 0xdffffc001fffc000: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x00000000fffe0000-0x00000000fffe0007]
CPU: 0 UID: 0 PID: 59 Comm: kworker/u8:4 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:mld_clear_delrec+0x2a6/0x640 net/ipv6/mcast.c:838
Code: 20 00 0f 85 91 03 00 00 49 8b 5d 28 49 c7 45 28 00 00 00 00 48 85 db 75 37 e9 d4 00 00 00 e8 d1 6a 8b f7 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 03 00 00 48 8b 2b 48 8d 7b 30 48 89 de e8
RSP: 0018:ffffc9000210f568 EFLAGS: 00010216
RAX: 000000001fffc000 RBX: 00000000fffe0000 RCX: ffffffff8a307086
RDX: ffff88801c3bbc00 RSI: ffffffff8a30701f RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888032a62400 R14: ffff8880697ca000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124975000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9e7780178 CR3: 000000003456e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ipv6_mc_destroy_dev+0x49/0x690 net/ipv6/mcast.c:2842
 addrconf_ifdown.isra.0+0x13ef/0x1a90 net/ipv6/addrconf.c:4000
 addrconf_notify+0x220/0x19e0 net/ipv6/addrconf.c:3780
 notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
 call_netdevice_notifiers net/core/dev.c:2282 [inline]
 unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
 unregister_netdevice_many net/core/dev.c:12139 [inline]
 default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
 ops_exit_list net/core/net_namespace.c:206 [inline]
 ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
 cleanup_net+0x408/0x890 net/core/net_namespace.c:686
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d7/0x6f0 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:mld_clear_delrec+0x2a6/0x640 net/ipv6/mcast.c:838
Code: 20 00 0f 85 91 03 00 00 49 8b 5d 28 49 c7 45 28 00 00 00 00 48 85 db 75 37 e9 d4 00 00 00 e8 d1 6a 8b f7 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 03 00 00 48 8b 2b 48 8d 7b 30 48 89 de e8
RSP: 0018:ffffc9000210f568 EFLAGS: 00010216
RAX: 000000001fffc000 RBX: 00000000fffe0000 RCX: ffffffff8a307086
RDX: ffff88801c3bbc00 RSI: ffffffff8a30701f RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888032a62400 R14: ffff8880697ca000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124a75000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf155b6038 CR3: 000000000e182000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	20 00                	and    %al,(%rax)
   2:	0f 85 91 03 00 00    	jne    0x399
   8:	49 8b 5d 28          	mov    0x28(%r13),%rbx
   c:	49 c7 45 28 00 00 00 	movq   $0x0,0x28(%r13)
  13:	00
  14:	48 85 db             	test   %rbx,%rbx
  17:	75 37                	jne    0x50
  19:	e9 d4 00 00 00       	jmp    0xf2
  1e:	e8 d1 6a 8b f7       	call   0xf78b6af4
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	0f 85 39 03 00 00    	jne    0x36e
  35:	48 8b 2b             	mov    (%rbx),%rbp
  38:	48 8d 7b 30          	lea    0x30(%rbx),%rdi
  3c:	48 89 de             	mov    %rbx,%rsi
  3f:	e8                   	.byte 0xe8