Bluetooth: hci2: unknown advertising packet type: 0x88
Bluetooth: hci2: unknown advertising packet type: 0xff
Bluetooth: hci2: unknown advertising packet type: 0xff
Bluetooth: hci2: unknown advertising packet type: 0x88
==================================================================
BUG: KASAN: slab-out-of-bounds in hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5619 [inline]
BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x33f5/0x3a50 net/bluetooth/hci_event.c:5660
Read of size 1 at addr ffff88808ee30f4c by task kworker/u5:1/6497

CPU: 1 PID: 6497 Comm: kworker/u5:1 Not tainted 4.19.139-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 mm/kasan/report.c:412 [inline]
 __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430
 hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5619 [inline]
 hci_le_meta_evt+0x33f5/0x3a50 net/bluetooth/hci_event.c:5660
 hci_event_packet+0x1e4a/0x862d net/bluetooth/hci_event.c:5904
 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 26179:
 __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 25325:
 __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
 sctp_chunk_destroy net/sctp/sm_make_chunk.c:1471 [inline]
 sctp_chunk_put+0x182/0x270 net/sctp/sm_make_chunk.c:1498
 sctp_packet_pack net/sctp/output.c:495 [inline]
 sctp_packet_transmit+0x10a4/0x3270 net/sctp/output.c:609
 sctp_packet_singleton net/sctp/outqueue.c:791 [inline]
 sctp_outq_flush_ctrl.constprop.0+0x6d3/0xc40 net/sctp/outqueue.c:922
 sctp_outq_flush net/sctp/outqueue.c:1204 [inline]
 sctp_outq_uncork+0x10b/0x200 net/sctp/outqueue.c:776
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1815 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x4d5/0x4e50 net/sctp/sm_sideeffect.c:1170
 sctp_primitive_ASSOCIATE+0x98/0xc0 net/sctp/primitive.c:88
 sctp_sendmsg_to_asoc+0x7bd/0x1de0 net/sctp/socket.c:1945
 sctp_sendmsg+0xeb8/0x1530 net/sctp/socket.c:2135
 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 __sys_sendto+0x21a/0x320 net/socket.c:1787
 __do_sys_sendto net/socket.c:1799 [inline]
 __se_sys_sendto net/socket.c:1795 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1795
 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 ffff88808ee30d40
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 12 bytes to the right of
 512-byte region [ffff88808ee30d40, ffff88808ee30f40)
The buggy address belongs to the page:
page:ffffea00023b8c00 count:1 mapcount:0 mapping:ffff88812c39c940 index:0xffff88808ee305c0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea000249f408 ffffea00028d1c08 ffff88812c39c940
raw: ffff88808ee305c0 ffff88808ee300c0 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808ee30e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808ee30e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88808ee30f00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                              ^
 ffff88808ee30f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808ee31000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================