==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:373 [inline]
BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_evt net/bluetooth/hci_event.c:2375 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x3dbf/0x858f net/bluetooth/hci_event.c:5747
Read of size 3 at addr ffff88809eba5cbf by task kworker/u5:4/10085

CPU: 1 PID: 10085 Comm: kworker/u5:4 Not tainted 4.19.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2 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+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report+0x8f/0x96 mm/kasan/report.c:412
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:373 [inline]
 hci_inquiry_result_evt net/bluetooth/hci_event.c:2375 [inline]
 hci_event_packet+0x3dbf/0x858f net/bluetooth/hci_event.c:5747
 hci_rx_work+0x46b/0xa90 net/bluetooth/hci_core.c:4359
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 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 10211:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0xae/0x560 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+0x51b/0x770 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 3715:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 skb_free_head net/core/skbuff.c:554 [inline]
 skb_release_data+0x6de/0x920 net/core/skbuff.c:574
 skb_release_all net/core/skbuff.c:631 [inline]
 __kfree_skb net/core/skbuff.c:645 [inline]
 consume_skb+0x113/0x3d0 net/core/skbuff.c:705
 skb_free_datagram+0x16/0xf0 net/core/datagram.c:329
 unix_dgram_recvmsg+0x73e/0xe80 net/unix/af_unix.c:2203
 sock_recvmsg_nosec net/socket.c:795 [inline]
 sock_recvmsg net/socket.c:802 [inline]
 sock_recvmsg+0xca/0x110 net/socket.c:798
 ___sys_recvmsg+0x255/0x570 net/socket.c:2277
 __sys_recvmsg net/socket.c:2326 [inline]
 __do_sys_recvmsg net/socket.c:2336 [inline]
 __se_sys_recvmsg net/socket.c:2333 [inline]
 __x64_sys_recvmsg+0x12f/0x220 net/socket.c:2333
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809eba5ac0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 511 bytes inside of
 512-byte region [ffff88809eba5ac0, ffff88809eba5cc0)
The buggy address belongs to the page:
page:ffffea00027ae940 count:1 mapcount:0 mapping:ffff88812c39c940 index:0xffff88809eba5d40
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea0002804448 ffffea0002277d08 ffff88812c39c940
raw: ffff88809eba5d40 ffff88809eba50c0 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809eba5b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809eba5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88809eba5c80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff88809eba5d00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff88809eba5d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Bluetooth: hci5: SCO packet for unknown connection handle 48904
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7744 Comm: kworker/u5:2 Tainted: G    B             4.19.136-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci5 hci_rx_work
RIP: 0010:hci_phy_link_complete_evt.isra.0+0x24a/0x7a0 net/bluetooth/hci_event.c:4682
Code: 48 c1 ea 03 80 3c 02 00 0f 85 60 05 00 00 48 8b 9d 28 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 23 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff888052fd7a78 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff867c041f
RDX: 0000000000000002 RSI: ffffffff867c042c RDI: 0000000000000010
RBP: ffff88804e47e740 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 000000002616cc40 R12: dffffc0000000000
R13: ffff88804ebdd7c0 R14: 00000000000000c8 R15: ffff88804ebdc890
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052a178 CR3: 000000009948e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hci_event_packet+0x1973/0x858f net/bluetooth/hci_event.c:5898
 hci_rx_work+0x46b/0xa90 net/bluetooth/hci_core.c:4359
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
---[ end trace 9bb89ceb325031ac ]---
RIP: 0010:hci_phy_link_complete_evt.isra.0+0x24a/0x7a0 net/bluetooth/hci_event.c:4682
Code: 48 c1 ea 03 80 3c 02 00 0f 85 60 05 00 00 48 8b 9d 28 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 23 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b