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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_inquiry_result_with_rssi_evt net/bluetooth/hci_event.c:3629 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x9524/0x9d13 net/bluetooth/hci_event.c:5363
Read of size 6 at addr ffff888094af0f3b by task kworker/u5:1/11646

CPU: 1 PID: 11646 Comm: kworker/u5:1 Not tainted 4.14.114 #4
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+0x138/0x19c lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393
 __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_inquiry_result_with_rssi_evt net/bluetooth/hci_event.c:3629 [inline]
 hci_event_packet+0x9524/0x9d13 net/bluetooth/hci_event.c:5363
 hci_rx_work+0x3ab/0x900 net/bluetooth/hci_core.c:4237
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

Allocated by task 13655:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x51/0x80 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
 __alloc_skb+0xcf/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+0xb6/0x437 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1774 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4ae/0x6c0 fs/read_write.c:482
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 12348:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 kernfs_fop_release+0x112/0x180 fs/kernfs/file.c:783
 __fput+0x277/0x7a0 fs/file_table.c:210
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x119/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
 do_syscall_64+0x4a9/0x630 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff888094af0d40
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 507 bytes inside of
 512-byte region [ffff888094af0d40, ffff888094af0f40)
The buggy address belongs to the page:
page:ffffea000252bc00 count:1 mapcount:0 mapping:ffff888094af00c0 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff888094af00c0 0000000000000000 0000000100000006
raw: ffffea0002a4fe20 ffffea0001a542a0 ffff8880aa800940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094af0e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888094af0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888094af0f00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff888094af0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094af1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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