Bluetooth: hci0: Unknown advertising packet type: 0xffff ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5651 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x384e/0x3eb0 net/bluetooth/hci_event.c:5922 Read of size 1 at addr ffff88808e10d209 by task kworker/u5:2/6925 CPU: 1 PID: 6925 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci0 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5651 [inline] hci_le_meta_evt+0x384e/0x3eb0 net/bluetooth/hci_event.c:5922 hci_event_packet+0x245a/0x86f5 net/bluetooth/hci_event.c:6167 hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Allocated by task 6899: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xae/0x550 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:377 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline] vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:285 call_write_iter include/linux/fs.h:1908 [inline] new_sync_write+0x422/0x650 fs/read_write.c:503 vfs_write+0x59d/0x6b0 fs/read_write.c:578 ksys_write+0x12d/0x250 fs/read_write.c:631 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 4969: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 __cache_free mm/slab.c:3426 [inline] kfree+0x103/0x2c0 mm/slab.c:3757 kernfs_fop_release+0x120/0x190 fs/kernfs/file.c:782 __fput+0x33c/0x880 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:135 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:239 [inline] __prepare_exit_to_usermode+0x1e9/0x1f0 arch/x86/entry/common.c:269 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88808e10d000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 9 bytes to the right of 512-byte region [ffff88808e10d000, ffff88808e10d200) The buggy address belongs to the page: page:ffffea0002384340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00027fab08 ffffea0002a09d48 ffff8880aa000a80 raw: 0000000000000000 ffff88808e10d000 0000000100000004 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808e10d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808e10d180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808e10d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88808e10d280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808e10d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================