Bluetooth: Unknown advertising packet type: 0x4200
==================================================================
BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5472 [inline]
BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x383e/0x3f20 net/bluetooth/hci_event.c:5714
Read of size 1 at addr ffff8880b53097c4 by task kworker/u5:1/8129

CPU: 1 PID: 8129 Comm: kworker/u5:1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: hci3 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
 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5472 [inline]
 hci_le_meta_evt+0x383e/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 22258:
 __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 21064:
 __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]
 kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672
 sctp_ulpq_tail_event+0x781/0xc00 net/sctp/ulpqueue.c:286
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1472 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0xd2b/0x5110 net/sctp/sm_sideeffect.c:1170
 sctp_primitive_ABORT+0x9b/0xc0 net/sctp/primitive.c:119
 sctp_close+0x240/0x7f0 net/sctp/socket.c:1572
 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:472
 __sock_release+0xcd/0x2a0 net/socket.c:599
 sock_close+0x15/0x20 net/socket.c:1214
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880b53095c0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 4 bytes to the right of
 512-byte region [ffff8880b53095c0, ffff8880b53097c0)
The buggy address belongs to the page:
page:ffffea0002d4c240 count:1 mapcount:0 mapping:ffff88813bff0940 index:0xffff8880b5309340
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002b9b648 ffffea00025d1b08 ffff88813bff0940
raw: ffff8880b5309340 ffff8880b53090c0 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b5309680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880b5309700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880b5309780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff8880b5309800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880b5309880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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