------------[ cut here ]------------
RTNL: assertion failed at net/core/dev.c (9391)
WARNING: net/core/dev.c:9391 at __dev_set_promiscuity+0x569/0x740, CPU#0: syz.2.2401/11592
Modules linked in:
CPU: 0 UID: 0 PID: 11592 Comm: syz.2.2401 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:__dev_set_promiscuity+0x569/0x740
Code: ed fb ff ff e8 d8 eb 53 f8 c6 05 a4 69 42 06 01 90 48 c7 c7 c0 8d b4 8c 48 c7 c6 c0 8c b4 8c ba af 24 00 00 e8 78 58 17 f8 90 <0f> 0b 90 90 e9 06 fb ff ff e8 a9 eb 53 f8 48 8b 7c 24 08 48 c7 c6
RSP: 0018:ffffc90006ebf660 EFLAGS: 00010246
RAX: 7c25d69ca78e4e00 RBX: ffff88802e2fc000 RCX: 0000000000080000
RDX: ffffc900040e4000 RSI: 0000000000000c55 RDI: 0000000000000c56
RBP: 0000000000000000 R08: ffff88804b024293 R09: 1ffff11009604852
R10: dffffc0000000000 R11: ffffed1009604853 R12: 00000000ffffffff
R13: 0000000000000000 R14: ffff88802e2fc0b0 R15: 1ffff11005c5f816
FS:  00007f9e100bf6c0(0000) GS:ffff8880b83dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e100befc8 CR3: 000000002d7ec000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __dev_set_rx_mode+0x17c/0x260
 dev_mc_add+0xc8/0x120
 igmp6_group_added+0x225/0x800
 __ipv6_dev_mc_inc+0x897/0xa50
 addrconf_join_solict+0xf8/0x170
 __ipv6_dev_ac_inc+0x87b/0xaf0
 ipv6_sock_ac_join+0x6bf/0x890
 do_ipv6_setsockopt+0x1e90/0x2eb0
 ipv6_setsockopt+0x59/0x170
 do_sock_setsockopt+0x17c/0x1b0
 __x64_sys_setsockopt+0x13f/0x1b0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e0f18ec29
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:00007f9e100bf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f9e0f3d5fa0 RCX: 00007f9e0f18ec29
RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000004
RBP: 00007f9e0f211e41 R08: 0000000000000014 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9e0f3d6038 R14: 00007f9e0f3d5fa0 R15: 00007ffd3adc0b08
 </TASK>
