kasan: CONFIG_KASAN_INLINE enabled
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
kasan: GPF could be caused by NULL-ptr deref or user memory access
IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready
general protection fault: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
Modules linked in:
CPU: 0 PID: 9416 Comm: syz-executor.2 Not tainted 4.14.275-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888050682640 task.stack: ffff888050688000
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:ffff88805068fd40 EFLAGS: 00010202
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005fd8000
RDX: 00000000000000a8 RSI: ffffffff85d0b322 RDI: 0000000000000540
RBP: ffff88805068fe30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: ffff888099f38a40
R13: 1ffff1100a0d1fab R14: 0000000000000000 R15: 00000000ffffffea
FS:  00007f28ca779700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffcb919a20 CR3: 0000000099d00000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
 SYSC_bind net/socket.c:1489 [inline]
 SyS_bind+0x174/0x1f0 net/socket.c:1475
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!
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f28cbe040e9
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
RSP: 002b:00007f28ca779168 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007f28cbf16f60 RCX: 00007f28cbe040e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f28cbe5e08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc8e06c9f R14: 00007f28ca779300 R15: 0000000000022000
Code: 4e 
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
04 0f 88 8f 
batman_adv: batadv0: Interface activated: batadv_slave_1
29 51 01 0f 84 b3 01 00 00 e8 1e 8f 84 fb 48 8d bb 40 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 0a 04 00 00 4c 89 e7 48 8b 83 40 05 00 00 65 
RIP: dev_put include/linux/netdevice.h:3381 [inline] RSP: ffff88805068fd40
RIP: llc_ui_bind+0x5ba/0xa40 net/llc/af_llc.c:427 RSP: ffff88805068fd40
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
---[ end trace 5a5a2cf16f07ea11 ]---
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready