batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
==================================================================
batman_adv: batadv0: Interface activated: batadv_slave_0
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in bacpy include/net/bluetooth/bluetooth.h:233 [inline]
BUG: KASAN: slab-out-of-bounds in hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:3840 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x8e05/0x9a1f net/bluetooth/hci_event.c:5375
Read of size 6 at addr ffff8880a570ac88 by task kworker/u5:0/1189

CPU: 1 PID: 1189 Comm: kworker/u5:0 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:409
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:440
 memcpy include/linux/string.h:347 [inline]
 bacpy include/net/bluetooth/bluetooth.h:233 [inline]
 hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:3840 [inline]
 hci_event_packet+0x8e05/0x9a1f net/bluetooth/hci_event.c:5375
IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready
device veth1_vlan entered promiscuous mode
 hci_rx_work+0x356/0x8e0 net/bluetooth/hci_core.c:4244
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready
 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2116
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250
device veth0_macvtap entered promiscuous mode
 kthread+0x338/0x400 kernel/kthread.c:232
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
device veth1_macvtap entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Allocated by task 7753:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x50/0x70 mm/slab.c:3696
 __kmalloc_reserve.isra.38+0x2c/0xc0 net/core/skbuff.c:137
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
 __alloc_skb+0xc1/0x500 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:980 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:336 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:180 [inline]
 vhci_write+0xa8/0x3e2 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x413/0x840 fs/read_write.c:482
 vfs_write+0x150/0x4f0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0x100/0x250 fs/read_write.c:582
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880a570aa80
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes to the right of
 512-byte region [ffff8880a570aa80, ffff8880a570ac80)
The buggy address belongs to the page:
page:ffffea000295c280 count:1 mapcount:0 mapping:ffff8880a570a080 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff8880a570a080 0000000000000000 0000000100000006
raw: ffffea0002147860 ffffea000295c2e0 ffff8880aa800940 0000000000000000
page dumped because: kasan: bad access detected

batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
Memory state around the buggy address:
 ffff8880a570ab80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a570ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a570ac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff8880a570ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a570ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================