IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
kasan: CONFIG_KASAN_INLINE enabled
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 9358 Comm: syz-executor.4 Not tainted 4.14.275-syzkaller #0
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a23c6180 task.stack: ffff88804f860000
RIP: 0010:dev_put include/linux/netdevice.h:3381 [inline]
RIP: 0010:llc_ui_bind+0x5ba/0xa40 net/llc/af_llc.c:427
RSP: 0018:ffff88804f867d40 EFLAGS: 00010202
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900086e7000
RDX: 00000000000000a8 RSI: ffffffff85d0b322 RDI: 0000000000000540
RBP: ffff88804f867e30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: ffff88809f042500
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
R13: 1ffff11009f0cfab R14: 0000000000000080 R15: 00000000ffffffea
FS:  00007f5973fd8700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005636fd6d4020 CR3: 00000000a0e03000 CR4: 00000000003406f0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
 SYSC_bind net/socket.c:1489 [inline]
 SyS_bind+0x174/0x1f0 net/socket.c:1475
batman_adv: batadv0: Interface activated: batadv_slave_0
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
device veth0_macvtap entered promiscuous mode
RIP: 0033:0x7f59756630e9
RSP: 002b:00007f5973fd8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
RAX: ffffffffffffffda RBX: 00007f5975775f60 RCX: 00007f59756630e9
RDX: 0000000000000080 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00007f59756bd08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
device veth1_macvtap entered promiscuous mode
R13: 00007fffccea782f R14: 00007f5973fd8300 R15: 0000000000022000
Code: 4e 04 0f 88 8f 29 51 01 0f 84 b3 
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
01 00 00 e8 1e 8f 84 fb 48 8d bb 40 05 00 00 48 b8 00 
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
3c 02 00 0f 85 0a 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
04 00 00 4c 89 e7 48 8b 83 40 05 00 00 65 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RIP: dev_put include/linux/netdevice.h:3381 [inline] RSP: ffff88804f867d40
RIP: llc_ui_bind+0x5ba/0xa40 net/llc/af_llc.c:427 RSP: ffff88804f867d40
---[ end trace 2e6146b75743483c ]---
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0