================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:406 [inline] BUG: KASAN: slab-out-of-bounds in bacpy include/net/bluetooth/bluetooth.h:278 [inline] BUG: KASAN: slab-out-of-bounds in hci_inquiry_result_with_rssi_evt+0x230/0x6b0 net/bluetooth/hci_event.c:4165 Read of size 6 at addr ffff8880a84df1fb by task kworker/u5:1/6837 CPU: 1 PID: 6837 Comm: kworker/u5:1 Not tainted 5.8.0-rc4-next-20200710-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/0x497 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:406 [inline] bacpy include/net/bluetooth/bluetooth.h:278 [inline] hci_inquiry_result_with_rssi_evt+0x230/0x6b0 net/bluetooth/hci_event.c:4165 hci_event_packet+0x1e8c/0x86fd net/bluetooth/hci_event.c:6100 hci_rx_work+0x22e/0xb50 net/bluetooth/hci_core.c:4869 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Allocated by task 6833: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xae/0x550 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1084 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:387 [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:1879 [inline] new_sync_write+0x422/0x650 fs/read_write.c:515 vfs_write+0x59d/0x6b0 fs/read_write.c:595 ksys_write+0x12d/0x250 fs/read_write.c:648 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8880a84df000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 507 bytes inside of 512-byte region [ffff8880a84df000, ffff8880a84df200) The buggy address belongs to the page: page:0000000017ed0181 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa84df flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00028c7988 ffffea00028eec88 ffff8880aa000600 raw: 0000000000000000 ffff8880a84df000 0000000100000004 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a84df100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a84df180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a84df200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a84df280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a84df300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================