netlink: 13 bytes leftover after parsing attributes in process `syz-executor.4'.
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:348 [inline]
BUG: KASAN: slab-out-of-bounds in bacpy include/net/bluetooth/bluetooth.h:236 [inline]
BUG: KASAN: slab-out-of-bounds in hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4162 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x7a85/0x80f9 net/bluetooth/hci_event.c:5844
Read of size 6 at addr ffff88808ef3df46 by task kworker/u5:0/1215

CPU: 0 PID: 1215 Comm: kworker/u5:0 Not tainted 4.19.127-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+0x54/0x222 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 memcpy include/linux/string.h:348 [inline]
 bacpy include/net/bluetooth/bluetooth.h:236 [inline]
 hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4162 [inline]
 hci_event_packet+0x7a85/0x80f9 net/bluetooth/hci_event.c:5844
 hci_rx_work+0x47b/0xab0 net/bluetooth/hci_core.c:4359
 process_one_work+0x892/0x1580 kernel/workqueue.c:2155
 worker_thread+0x96/0xe20 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 14033:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:137
 __alloc_skb+0xef/0x5b0 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+0x512/0x760 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 9:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xce/0x220 mm/slab.c:3822
 skb_free_head+0x91/0xb0 net/core/skbuff.c:554
 skb_release_data+0x623/0x8e0 net/core/skbuff.c:574
 skb_release_all+0x46/0x60 net/core/skbuff.c:631
 __kfree_skb net/core/skbuff.c:645 [inline]
 kfree_skb+0xe1/0x390 net/core/skbuff.c:663
 ip6_mc_input+0x831/0xa88 net/ipv6/ip6_input.c:518
 dst_input include/net/dst.h:453 [inline]
 ip6_rcv_finish+0x1d9/0x2f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ipv6_rcv+0x101/0x400 net/ipv6/ip6_input.c:283
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4960
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5072
 process_backlog+0x235/0x750 net/core/dev.c:5854
 napi_poll net/core/dev.c:6277 [inline]
 net_rx_action+0x498/0xf70 net/core/dev.c:6343
 __do_softirq+0x26c/0x93d kernel/softirq.c:292

The buggy address belongs to the object at ffff88808ef3dd40
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 6 bytes to the right of
 512-byte region [ffff88808ef3dd40, ffff88808ef3df40)
The buggy address belongs to the page:
page:ffffea00023bcf40 count:1 mapcount:0 mapping:ffff88812c3dc940 index:0xffff88808ef3d840
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea0002a4e3c8 ffffea00022fa788 ffff88812c3dc940
raw: ffff88808ef3d840 ffff88808ef3d0c0 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808ef3de00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808ef3de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88808ef3df00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff88808ef3df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808ef3e000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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