IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
Bluetooth: hci3 SCO packet for unknown connection handle 3450
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
Modules linked in:
CPU: 1 PID: 7688 Comm: kworker/u5:2 Not tainted 4.14.191-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci3 hci_rx_work
task: ffff8880613381c0 task.stack: ffff888061340000
RIP: 0010:hci_phy_link_complete_evt.isra.0+0x1f3/0x6c0 net/bluetooth/hci_event.c:4360
RSP: 0018:ffff888061347ad0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100c267158
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000010
RBP: ffff88808a8ea980 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880613381c0 R12: ffff88805ea299a8
R13: 00000000000000c8 R14: ffff8880a9bf028b R15: ffff88805ea28a50
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000768000 CR3: 0000000007c6a000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hci_event_packet+0x2592/0x7c7a net/bluetooth/hci_event.c:5429
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:372 [inline]
BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_evt net/bluetooth/hci_event.c:2112 [inline]
BUG: KASAN: slab-out-of-bounds in hci_event_packet+0x35fc/0x7c7a net/bluetooth/hci_event.c:5278
Read of size 3 at addr ffff88808fb9473f by task kworker/u5:0/6251

CPU: 0 PID: 6251 Comm: kworker/u5:0 Not tainted 4.14.191-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:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 hci_rx_work+0x3e6/0x970 net/bluetooth/hci_core.c:4244
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 kasan_report+0x6f/0x7b mm/kasan/report.c:409
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 memcpy include/linux/string.h:372 [inline]
 hci_inquiry_result_evt net/bluetooth/hci_event.c:2112 [inline]
 hci_event_packet+0x35fc/0x7c7a net/bluetooth/hci_event.c:5278
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 
fa 
48 
c1 
ea 
03 
80 
 hci_rx_work+0x3e6/0x970 net/bluetooth/hci_core.c:4244
3c 
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
02 
00 
0f 
85 
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
dd 
04 
 kthread+0x30d/0x420 kernel/kthread.c:232
00 
00 
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
48 

8b 
Allocated by task 6329:
9d 
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
40 
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696
08 
 __kmalloc_reserve net/core/skbuff.c:137 [inline]
 __alloc_skb+0x96/0x510 net/core/skbuff.c:205
00 
 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+0xb1/0x420 drivers/bluetooth/hci_vhci.c:299
00 
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
48 
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
b8 
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
00 
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
00 
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
00 

00 
Freed by task 3656:
00 
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
fc 
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
ff 
 skb_free_head net/core/skbuff.c:554 [inline]
 skb_release_data+0x5f6/0x820 net/core/skbuff.c:574
df 
 skb_release_all net/core/skbuff.c:631 [inline]
 __kfree_skb net/core/skbuff.c:645 [inline]
 consume_skb+0xe0/0x380 net/core/skbuff.c:705
48 
 netlink_broadcast_filtered+0x2ab/0x9e0 net/netlink/af_netlink.c:1489
8d 
 kobject_uevent_env+0x851/0xcb0 lib/kobject_uevent.c:495
7b 
 kobject_synth_uevent+0x5b6/0x6ca lib/kobject_uevent.c:205
10 
 uevent_store+0x21/0x60 drivers/base/core.c:1005
48 
 dev_attr_store+0x56/0x80 drivers/base/core.c:723
89 
 sysfs_kf_write+0x106/0x160 fs/sysfs/file.c:141
fa 
 kernfs_fop_write+0x289/0x440 fs/kernfs/file.c:316
48 
 __vfs_write+0xe4/0x630 fs/read_write.c:480
c1 
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
ea 
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
03 
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
<80> 
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
3c 

02 
The buggy address belongs to the object at ffff88808fb94540
 which belongs to the cache kmalloc-512 of size 512
00 
The buggy address is located 511 bytes inside of
 512-byte region [ffff88808fb94540, ffff88808fb94740)
0f 
The buggy address belongs to the page:
85 
page:ffffea00023ee500 count:1 mapcount:0 mapping:ffff88808fb94040 index:0xffff88808fb94a40
a0 
04 
flags: 0xfffe0000000100(slab)
00 
raw: 00fffe0000000100 ffff88808fb94040 ffff88808fb94a40 0000000100000004
00 
raw: ffffea00024bbfe0 ffffea00027af020 ffff88812fe52940 0000000000000000
48 
page dumped because: kasan: bad access detected
b8 

00 
Memory state around the buggy address:
00 
 ffff88808fb94600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 
 ffff88808fb94680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 
>ffff88808fb94700: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
00 
                                           ^
fc 
 ffff88808fb94780: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
ff 
 ffff88808fb94800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
df 
==================================================================
48 
RIP: hci_phy_link_complete_evt.isra.0+0x1f3/0x6c0 net/bluetooth/hci_event.c:4360 RSP: ffff888061347ad0
---[ end trace 78a6321841a2fb5e ]---