IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_0
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!
==================================================================
BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_with_rssi_evt+0x614/0x6b0 net/bluetooth/hci_event.c:3953
Read of size 1 at addr ffff88808e1179c0 by task kworker/u5:0/1226

CPU: 0 PID: 1226 Comm: kworker/u5:0 Not tainted 4.19.136-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:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430
 hci_inquiry_result_with_rssi_evt+0x614/0x6b0 net/bluetooth/hci_event.c:3953
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
 hci_event_packet+0x18a3/0x858f net/bluetooth/hci_event.c:5833
 hci_rx_work+0x46b/0xa90 net/bluetooth/hci_core.c:4359
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 kthread+0x30b/0x410 kernel/kthread.c:246
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 7748:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0xae/0x560 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:995 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:180 [inline]
 vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88808e1177c0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
 512-byte region [ffff88808e1177c0, ffff88808e1179c0)
The buggy address belongs to the page:
page:ffffea00023845c0 count:1 mapcount:0 mapping:ffff88812c39c940 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea00023955c8 ffffea0002a04848 ffff88812c39c940
raw: 0000000000000000 ffff88808e117040 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808e117880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808e117900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88808e117980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff88808e117a00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff88808e117a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================