netlink: 'syz.4.2352': attribute type 1 has an invalid length.
netlink: 'syz.4.2352': attribute type 1 has an invalid length.
Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007]
CPU: 0 UID: 0 PID: 12770 Comm: syz.4.2352 Not tainted 6.16.0-syzkaller-06619-gd942fe13f72b #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:ip6_mc_clear_src+0x18f/0x580 net/ipv6/mcast.c:2593
Code: ff ff ff e8 13 b5 41 01 89 c5 31 ff 89 c6 e8 08 9e 91 f7 85 ed 74 45 e8 bf 99 91 f7 eb 05 e8 b8 99 91 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 92 bc f4 f7 49 8b 2c 24 49 8d 7c
RSP: 0018:ffffc900030a76a0 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: 1ffff1100b353c82 RCX: 0000000000080000
RDX: ffffc9000bdca000 RSI: 000000000000331f RDI: 0000000000003320
RBP: 0000000000000001 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 00000000ffff0000
R13: dffffc0000000000 R14: 0000000000000538 R15: ffff888059a9e410
FS:  00007f64ee96e6c0(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000019800 CR3: 0000000077020000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 mld_clear_delrec+0x160/0x660 net/ipv6/mcast.c:828
 ipv6_mc_destroy_dev+0x45/0x5a0 net/ipv6/mcast.c:2839
 addrconf_ifdown+0x139e/0x1880 net/ipv6/addrconf.c:3996
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_mtu net/core/dev.c:2304 [inline]
 netif_set_mtu_ext+0x594/0x7d0 net/core/dev.c:9669
 netif_set_mtu+0xa4/0x150 net/core/dev.c:9690
 dev_set_mtu+0x126/0x260 net/core/dev_api.c:248
 dev_ioctl+0x7b4/0x1150 net/core/dev_ioctl.c:824
 sock_do_ioctl+0x22c/0x300 net/socket.c:1252
 sock_ioctl+0x576/0x790 net/socket.c:1359
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584
 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: 0033:0x7f64edb8ebe9
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:00007f64ee96e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f64eddb5fa0 RCX: 00007f64edb8ebe9
RDX: 0000200000000440 RSI: 0000000000008922 RDI: 0000000000000003
RBP: 00007f64edc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f64eddb6038 R14: 00007f64eddb5fa0 R15: 00007ffc58556d18
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip6_mc_clear_src+0x18f/0x580 net/ipv6/mcast.c:2593
Code: ff ff ff e8 13 b5 41 01 89 c5 31 ff 89 c6 e8 08 9e 91 f7 85 ed 74 45 e8 bf 99 91 f7 eb 05 e8 b8 99 91 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 92 bc f4 f7 49 8b 2c 24 49 8d 7c
RSP: 0018:ffffc900030a76a0 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: 1ffff1100b353c82 RCX: 0000000000080000
RDX: ffffc9000bdca000 RSI: 000000000000331f RDI: 0000000000003320
RBP: 0000000000000001 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 00000000ffff0000
R13: dffffc0000000000 R14: 0000000000000538 R15: ffff888059a9e410
FS:  00007f64ee96e6c0(0000) GS:ffff888125d80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0caa1aff98 CR3: 0000000077020000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	e8 13 b5 41 01       	call   0x141b518
   5:	89 c5                	mov    %eax,%ebp
   7:	31 ff                	xor    %edi,%edi
   9:	89 c6                	mov    %eax,%esi
   b:	e8 08 9e 91 f7       	call   0xf7919e18
  10:	85 ed                	test   %ebp,%ebp
  12:	74 45                	je     0x59
  14:	e8 bf 99 91 f7       	call   0xf79199d8
  19:	eb 05                	jmp    0x20
  1b:	e8 b8 99 91 f7       	call   0xf79199d8
  20:	4c 89 e0             	mov    %r12,%rax
  23:	48 c1 e8 03          	shr    $0x3,%rax
* 27:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2c:	74 08                	je     0x36
  2e:	4c 89 e7             	mov    %r12,%rdi
  31:	e8 92 bc f4 f7       	call   0xf7f4bcc8
  36:	49 8b 2c 24          	mov    (%r12),%rbp
  3a:	49                   	rex.WB
  3b:	8d                   	.byte 0x8d
  3c:	7c                   	.byte 0x7c