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BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_with_rssi_evt net/bluetooth/hci_event.c:4000 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x9d1f/0xa8f4 net/bluetooth/hci_event.c:5875
Read of size 1 at addr ffff8880a5f4dac0 by task kworker/u5:0/1502

CPU: 1 PID: 1502 Comm: kworker/u5:0 Not tainted 5.2.0-rc6-next-20190627 #24
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+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.cold+0xd4/0x306 mm/kasan/report.c:351
 __kasan_report.cold+0x1b/0x36 mm/kasan/report.c:482
 kasan_report+0x12/0x17 mm/kasan/common.c:614
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
 hci_inquiry_result_with_rssi_evt net/bluetooth/hci_event.c:4000 [inline]
 hci_event_packet+0x9d1f/0xa8f4 net/bluetooth/hci_event.c:5875
 hci_rx_work+0x47e/0xae0 net/bluetooth/hci_core.c:4459
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:353

Allocated by task 9310:
 save_stack+0x23/0x90 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_kmalloc mm/kasan/common.c:489 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503
 __do_kmalloc_node mm/slab.c:3616 [inline]
 __kmalloc_node_track_caller+0x4e/0x70 mm/slab.c:3630
 __kmalloc_reserve.isra.0+0x40/0xf0 net/core/skbuff.c:139
 __alloc_skb+0x10b/0x5e0 net/core/skbuff.c:207
 alloc_skb include/linux/skbuff.h:1054 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline]
 vhci_write+0xc4/0x470 drivers/bluetooth/hci_vhci.c:284
 call_write_iter include/linux/fs.h:1870 [inline]
 new_sync_write+0x4d3/0x770 fs/read_write.c:483
 __vfs_write+0xe1/0x110 fs/read_write.c:496
 vfs_write+0x268/0x5d0 fs/read_write.c:558
 ksys_write+0x14f/0x290 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:620
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 5973:
 save_stack+0x23/0x90 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10a/0x2c0 mm/slab.c:3757
 free_pipe_info+0x243/0x300 fs/pipe.c:708
 put_pipe_info+0xd0/0xf0 fs/pipe.c:581
 pipe_release+0x1e6/0x280 fs/pipe.c:602
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x280/0x2d0 arch/x86/entry/common.c:168
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x5a9/0x6a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880a5f4d6c0
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes to the right of
 1024-byte region [ffff8880a5f4d6c0, ffff8880a5f4dac0)
The buggy address belongs to the page:
page:ffffea000297d300 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0xffff8880a5f4db40 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea00023f6388 ffffea0002473288 ffff8880aa400c40
raw: ffff8880a5f4db40 ffff8880a5f4c040 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a5f4d980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a5f4da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a5f4da80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff8880a5f4db00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880a5f4db80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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