Bluetooth: hci4: Unknown advertising packet type: 0x6958
==================================================================
BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline]
BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0xce8/0x3010 net/bluetooth/hci_event.c:6208
Read of size 1 at addr ffff0000e7e70606 by task kworker/u5:3/4037

CPU: 1 PID: 4037 Comm: kworker/u5:3 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: hci4 hci_rx_work
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c mm/kasan/report.c:451
 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5935 [inline]
 hci_le_meta_evt+0xce8/0x3010 net/bluetooth/hci_event.c:6208
 hci_event_packet+0xd10/0x11bc net/bluetooth/hci_event.c:6525
 hci_rx_work+0x1cc/0x880 net/bluetooth/hci_core.c:5160
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Allocated by task 4701:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb0/0xf0 mm/kasan/common.c:522
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc_node_track_caller+0x234/0x3bc mm/slub.c:4963
 kmalloc_reserve+0xe4/0x26c net/core/skbuff.c:356
 __alloc_skb+0x23c/0x67c net/core/skbuff.c:427
 alloc_skb include/linux/skbuff.h:1162 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:392 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline]
 vhci_write+0xb8/0x3ac drivers/bluetooth/hci_vhci.c:290
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x7c8/0xa2c fs/read_write.c:594
 ksys_write+0x120/0x210 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the object at ffff0000e7e70400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 6 bytes to the right of
 512-byte region [ffff0000e7e70400, ffff0000e7e70600)
The buggy address belongs to the page:
page:0000000056fa33cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x127e70
head:0000000056fa33cb order:2 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002600
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e7e70500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e7e70580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e7e70600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff0000e7e70680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e7e70700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Bluetooth: hci4: Unknown advertising packet type: 0x100
Bluetooth: hci4: Unknown advertising packet type: 0x5000
Bluetooth: hci4: Unknown advertising packet type: 0xffff
Bluetooth: hci4: Unknown advertising packet type: 0x1078
Bluetooth: hci4: Unknown advertising packet type: 0x6300
Bluetooth: hci4: Unknown advertising packet type: 0x11a0