BUG: kernel NULL pointer dereference, address: 0000000000000c8d
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 800000016959d067 P4D 800000016959d067 PUD 0 
Oops: Oops: 0000 [#1] SMP PTI
CPU: 1 UID: 0 PID: 5590 Comm: syz.2.16 Not tainted 6.14.0-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [inline]
RIP: 0010:addrconf_add_ifaddr+0xf6/0x240 net/ipv6/addrconf.c:3157
Code: bb ff ff ff ff e9 37 01 00 00 4c 89 34 24 8b 44 24 40 89 44 24 08 e8 89 08 b4 ff 8b 74 24 44 4c 89 ff e8 8d a1 b0 ff 49 89 c6 <0f> b6 98 8d 0c 00 00 31 ff 89 de e8 6a ac c0 fd 85 db 74 0c e8 61
RSP: 0018:ffffc90002183ce0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888109305340
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881791cd7c0
RBP: 0000000000008916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86a8c020
R13: ffffffff86a8c020 R14: 0000000000000000 R15: ffff8881791cd7c0
FS:  00007fbe0bbff6c0(0000) GS:ffff8882b1288000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000c8d CR3: 0000000165ada000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inet6_ioctl+0xab/0x1c0 net/ipv6/af_inet6.c:580
 sock_do_ioctl+0x7a/0x220 net/socket.c:1190
 sock_ioctl+0x45e/0x5e0 net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xb9/0x130 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8d/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe0c18d169
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:00007fbe0bbff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbe0c3a5fa0 RCX: 00007fbe0c18d169
RDX: 00002000000000c0 RSI: 0000000000008916 RDI: 0000000000000003
RBP: 00007fbe0c20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbe0c3a5fa0 R15: 00007ffefa86b8f8
 </TASK>
Modules linked in:
CR2: 0000000000000c8d
---[ end trace 0000000000000000 ]---
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [inline]
RIP: 0010:addrconf_add_ifaddr+0xf6/0x240 net/ipv6/addrconf.c:3157
Code: bb ff ff ff ff e9 37 01 00 00 4c 89 34 24 8b 44 24 40 89 44 24 08 e8 89 08 b4 ff 8b 74 24 44 4c 89 ff e8 8d a1 b0 ff 49 89 c6 <0f> b6 98 8d 0c 00 00 31 ff 89 de e8 6a ac c0 fd 85 db 74 0c e8 61
RSP: 0018:ffffc90002183ce0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888109305340
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881791cd7c0
RBP: 0000000000008916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86a8c020
R13: ffffffff86a8c020 R14: 0000000000000000 R15: ffff8881791cd7c0
FS:  00007fbe0bbff6c0(0000) GS:ffff8882b1288000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000c8d CR3: 0000000165ada000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	bb ff ff ff ff       	mov    $0xffffffff,%ebx
   5:	e9 37 01 00 00       	jmp    0x141
   a:	4c 89 34 24          	mov    %r14,(%rsp)
   e:	8b 44 24 40          	mov    0x40(%rsp),%eax
  12:	89 44 24 08          	mov    %eax,0x8(%rsp)
  16:	e8 89 08 b4 ff       	call   0xffb408a4
  1b:	8b 74 24 44          	mov    0x44(%rsp),%esi
  1f:	4c 89 ff             	mov    %r15,%rdi
  22:	e8 8d a1 b0 ff       	call   0xffb0a1b4
  27:	49 89 c6             	mov    %rax,%r14
* 2a:	0f b6 98 8d 0c 00 00 	movzbl 0xc8d(%rax),%ebx <-- trapping instruction
  31:	31 ff                	xor    %edi,%edi
  33:	89 de                	mov    %ebx,%esi
  35:	e8 6a ac c0 fd       	call   0xfdc0aca4
  3a:	85 db                	test   %ebx,%ebx
  3c:	74 0c                	je     0x4a
  3e:	e8                   	.byte 0xe8
  3f:	61                   	(bad)