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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:238
Read of size 6 at addr ffff8880962bea08 by task kworker/u5:0/1605

CPU: 1 PID: 1605 Comm: kworker/u5:0 Not tainted 5.6.0-rc6-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:374
 __kasan_report.cold.11+0x1b/0x32 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:641
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x153/0x1d0 mm/kasan/generic.c:192
 memcpy+0x23/0x50 mm/kasan/common.c:127
 memcpy include/linux/string.h:381 [inline]
 bacpy+0xe/0x10 include/net/bluetooth/bluetooth.h:238
 hci_extended_inquiry_result_evt net/bluetooth/hci_event.c:4281 [inline]
 hci_event_packet+0x40ba/0x9868 net/bluetooth/hci_event.c:5984
 hci_rx_work+0x18e/0x940 net/bluetooth/hci_core.c:4557
 process_one_work+0x88b/0x1680 kernel/workqueue.c:2266
 worker_thread+0x85/0xb60 kernel/workqueue.c:2412
 kthread+0x331/0x3f0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 8468:
 save_stack+0x21/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc.constprop.17+0xc7/0xd0 mm/kasan/common.c:515
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
 __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:1081 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:341 [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:1902 [inline]
 new_sync_write+0x3fd/0x7e0 fs/read_write.c:483
 __vfs_write+0x94/0x110 fs/read_write.c:496
 vfs_write+0x18a/0x520 fs/read_write.c:558
 ksys_write+0x105/0x220 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+0x6e/0xb0 fs/read_write.c:620
 do_syscall_64+0xca/0x630 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8269:
 save_stack+0x21/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x108/0x2c0 mm/slab.c:3757
 load_elf_binary+0x1ab1/0x40d0 fs/binfmt_elf.c:1086
 search_binary_handler+0x11f/0x620 fs/exec.c:1662
 exec_binprm fs/exec.c:1705 [inline]
 __do_execve_file.isra.33+0x1288/0x1f90 fs/exec.c:1825
 do_execveat_common fs/exec.c:1871 [inline]
 do_execve fs/exec.c:1888 [inline]
 __do_sys_execve fs/exec.c:1964 [inline]
 __se_sys_execve fs/exec.c:1959 [inline]
 __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959
 do_syscall_64+0xca/0x630 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880962be800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes to the right of
 512-byte region [ffff8880962be800, ffff8880962bea00)
The buggy address belongs to the page:
page:ffffea000258af80 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00027cadc8 ffffea00026093c8 ffff8880aa400a80
raw: 0000000000000000 ffff8880962be000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880962be900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880962be980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880962bea00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff8880962bea80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880962beb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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