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BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:381 [inline]
BUG: KASAN: slab-out-of-bounds in bacpy+0xe/0x10 include/net/bluetooth/bluetooth.h:255
Read of size 6 at addr ffff88809e7c3208 by task kworker/u5:0/1611

CPU: 1 PID: 1611 Comm: kworker/u5:0 Not tainted 5.7.0-rc1-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+0x12d/0x187 lib/dump_stack.c:118
 print_address_description.constprop.8.cold.10+0x9/0x31d mm/kasan/report.c:382
 __kasan_report.cold.11+0x37/0x4e mm/kasan/report.c:511
 kasan_report+0x38/0x50 mm/kasan/common.c:625
 check_memory_region_inline mm/kasan/generic.c:187 [inline]
 check_memory_region+0x1cc/0x1f0 mm/kasan/generic.c:193
 memcpy+0x23/0x60 mm/kasan/common.c:106
 memcpy include/linux/string.h:381 [inline]
 bacpy+0xe/0x10 include/net/bluetooth/bluetooth.h:255
 hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4357 [inline]
 hci_event_packet+0x3195/0x9652 net/bluetooth/hci_event.c:6075
 hci_rx_work+0x18e/0x950 net/bluetooth/hci_core.c:4686
 process_one_work+0x893/0x1690 kernel/workqueue.c:2268
 worker_thread+0x85/0xb60 kernel/workqueue.c:2414
 kthread+0x354/0x420 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 8016:
 save_stack+0x21/0x50 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc.constprop.17+0xc7/0xd0 mm/kasan/common.c:495
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:509
 __do_kmalloc_node mm/slab.c:3616 [inline]
 __kmalloc_node_track_caller+0x4d/0x70 mm/slab.c:3630
 __kmalloc_reserve.isra.46+0x2c/0xc0 net/core/skbuff.c:142
 __alloc_skb+0xd7/0x570 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1083 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:358 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline]
 vhci_write+0xa8/0x3e0 drivers/bluetooth/hci_vhci.c:285
 call_write_iter include/linux/fs.h:1907 [inline]
 new_sync_write+0x400/0x7e0 fs/read_write.c:484
 __vfs_write+0x94/0x110 fs/read_write.c:497
 vfs_write+0x190/0x530 fs/read_write.c:559
 ksys_write+0x10b/0x220 fs/read_write.c:612
 __do_sys_write fs/read_write.c:624 [inline]
 __se_sys_write fs/read_write.c:621 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:621
 do_syscall_64+0xca/0x630 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809e7c3000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes to the right of
 512-byte region [ffff88809e7c3000, ffff88809e7c3200)
The buggy address belongs to the page:
page:ffffea000279f0c0 refcount:1 mapcount:0 mapping:0000000018155c57 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000277d308 ffffea00024b40c8 ffff8880aa400a80
raw: 0000000000000000 ffff88809e7c3000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809e7c3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809e7c3180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88809e7c3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff88809e7c3280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809e7c3300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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