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: 1 UID: 0 PID: 2667 Comm: syz.2.7750 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:mld_clear_delrec+0x3a5/0x660
Code: ff ff ff e8 dd 3c 41 01 89 c5 31 ff 89 c6 e8 52 f1 86 f7 85 ed 74 40 e8 09 ed 86 f7 eb 05 e8 02 ed 86 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 bc 58 ea f7 4d 8b 27 49 8d 7f 30
RSP: 0018:ffffc900071f6b70 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: ffff8881275aa538 RCX: 0000000000080000
RDX: ffffc90020eb9000 RSI: 0000000000002552 RDI: 0000000000002553
RBP: 0000000000000000 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: ffff888105f59828
R13: dffffc0000000000 R14: ffff888105f59800 R15: 00000000ffff0000
FS:  00007f9427fc36c0(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c27e068 CR3: 000000012355a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ipv6_mc_destroy_dev+0x45/0x5a0
 addrconf_ifdown+0x139e/0x1880
 addrconf_notify+0x1bc/0x1010
 notifier_call_chain+0x1b6/0x3e0
 unregister_netdevice_many_notify+0x14d7/0x1ff0
 unregister_netdevice_queue+0x33c/0x380
 nsim_destroy+0x1dd/0x670
 __nsim_dev_port_del+0x14d/0x1b0
 nsim_dev_reload_destroy+0x288/0x490
 nsim_dev_reload_down+0x8a/0xc0
 devlink_reload+0x1b6/0x8d0
 devlink_nl_reload_doit+0xb35/0xd50
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f942718ebe9
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:00007f9427fc3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f94273b5fa0 RCX: 00007f942718ebe9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f9427211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94273b6038 R14: 00007f94273b5fa0 R15: 00007fff3ee3dc58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mld_clear_delrec+0x3a5/0x660
Code: ff ff ff e8 dd 3c 41 01 89 c5 31 ff 89 c6 e8 52 f1 86 f7 85 ed 74 40 e8 09 ed 86 f7 eb 05 e8 02 ed 86 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 bc 58 ea f7 4d 8b 27 49 8d 7f 30
RSP: 0018:ffffc900071f6b70 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: ffff8881275aa538 RCX: 0000000000080000
RDX: ffffc90020eb9000 RSI: 0000000000002552 RDI: 0000000000002553
RBP: 0000000000000000 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: ffff888105f59828
R13: dffffc0000000000 R14: ffff888105f59800 R15: 00000000ffff0000
FS:  00007f9427fc36c0(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2a1c34 CR3: 000000012355a000 CR4: 00000000000006f0
