kasan: GPF could be caused by NULL-ptr deref or user memory access
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
general protection fault: 0000 [#1] PREEMPT SMP KASAN
batman_adv: batadv0: Interface activated: batadv_slave_1
Modules linked in:
CPU: 0 PID: 9381 Comm: syz-executor.5 Not tainted 4.14.275-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880b0054640 task.stack: ffff888051800000
RIP: 0010:dev_put include/linux/netdevice.h:3381 [inline]
RIP: 0010:llc_ui_autobind.isra.0+0x26b/0x390 net/llc/af_llc.c:320
RSP: 0018:ffff888051807bf8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888094e94b40 RCX: ffffc900077c0000
RDX: 00000000000000a8 RSI: ffffffff85d0c563 RDI: 0000000000000540
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready
R13: ffff888051807e28 R14: ffff88805242c4c0 R15: ffff88805242c4e0
FS:  00007fc94ea95700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b5967a020 CR3: 00000000ab765000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
device veth0_vlan entered promiscuous mode
 llc_ui_sendmsg+0x638/0xec0 net/llc/af_llc.c:952
device veth1_vlan entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
device veth0_macvtap entered promiscuous mode
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fc9501200e9
RSP: 002b:00007fc94ea95168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
RAX: ffffffffffffffda RBX: 00007fc950232f60 RCX: 00007fc9501200e9
device veth1_macvtap entered promiscuous mode
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
RBP: 00007fc95017a08d R08: 0000000020000080 R09: 0000000000000010
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcdd17120f R14: 00007fc94ea95300 R15: 0000000000022000
Code: 55 ff ff 48 0f ba 73 60 08 45 31 e4 31 ed e8 dd 7c 
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
84 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
fb 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
48 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
8d 
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
bd 40 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f2 00 00 00 48 8b 85 40 05 00 00 65 ff 08 44 
RIP: dev_put include/linux/netdevice.h:3381 [inline] RSP: ffff888051807bf8
RIP: llc_ui_autobind.isra.0+0x26b/0x390 net/llc/af_llc.c:320 RSP: ffff888051807bf8
---[ end trace c2f939f52e1c189f ]---
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!