Bluetooth: Unknown advertising packet type: 0xff00
Bluetooth: Unknown advertising packet type: 0xffff
Bluetooth: Unknown advertising packet type: 0x200
Bluetooth: hci5: advertising data len corrected
==================================================================
BUG: KASAN: slab-out-of-bounds in process_adv_report+0xd8f/0xe70 net/bluetooth/hci_event.c:5215
Read of size 1 at addr ffff8880ab30376b by task kworker/u5:0/1717

CPU: 1 PID: 1717 Comm: kworker/u5:0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: hci5 hci_rx_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430
 process_adv_report+0xd8f/0xe70 net/bluetooth/hci_event.c:5215
 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5470 [inline]
 hci_le_meta_evt+0x2049/0x3f20 net/bluetooth/hci_event.c:5714
 hci_event_packet+0x34ad/0x7e20 net/bluetooth/hci_event.c:5959
 hci_rx_work+0x4ad/0xc70 net/bluetooth/hci_core.c:4380
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 23726:
 __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 7:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 skb_free_head net/core/skbuff.c:563 [inline]
 skb_release_data+0x6de/0x920 net/core/skbuff.c:583
 skb_release_all net/core/skbuff.c:640 [inline]
 __kfree_skb net/core/skbuff.c:654 [inline]
 consume_skb+0x113/0x3d0 net/core/skbuff.c:714
 netlink_broadcast_filtered+0x31f/0xbc0 net/netlink/af_netlink.c:1527
 netlink_broadcast net/netlink/af_netlink.c:1549 [inline]
 nlmsg_multicast include/net/netlink.h:591 [inline]
 nlmsg_notify+0x15e/0x1f0 net/netlink/af_netlink.c:2506
 __neigh_notify+0xdc/0x160 net/core/neighbour.c:2926
 neigh_cleanup_and_release+0x71/0xd0 net/core/neighbour.c:106
 neigh_del+0x1e5/0x2b0 net/core/neighbour.c:142
 neigh_forced_gc net/core/neighbour.c:191 [inline]
 neigh_alloc net/core/neighbour.c:317 [inline]
 __neigh_create+0xd72/0x1c40 net/core/neighbour.c:501
 ip6_finish_output2+0x8cc/0x2290 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
 dst_output include/net/dst.h:455 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x131/0x690 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1696 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
 __do_softirq+0x265/0x980 kernel/softirq.c:292

The buggy address belongs to the object at ffff8880ab303540
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 43 bytes to the right of
 512-byte region [ffff8880ab303540, ffff8880ab303740)
The buggy address belongs to the page:
page:ffffea0002acc0c0 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea00027812c8 ffffea0002a47788 ffff88813bff0940
raw: 0000000000000000 ffff8880ab303040 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880ab303600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880ab303680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880ab303700: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                          ^
 ffff8880ab303780: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880ab303800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================