Bluetooth: Unknown advertising packet type: 0x74 Bluetooth: Unknown advertising packet type: 0x74 Bluetooth: Unknown advertising packet type: 0x74 Bluetooth: Unknown advertising packet type: 0x51 ================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5153 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x3ae3/0x43c0 net/bluetooth/hci_event.c:5193 Read of size 1 at addr ffff88809325e24c by task kworker/u5:6/8055 CPU: 1 PID: 8055 Comm: kworker/u5:6 Not tainted 4.14.209-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci2 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load1_noabort+0x68/0x70 mm/kasan/report.c:427 hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5153 [inline] hci_le_meta_evt+0x3ae3/0x43c0 net/bluetooth/hci_event.c:5193 hci_event_packet+0x2217/0x750f net/bluetooth/hci_event.c:5429 hci_rx_work+0x427/0xb40 net/bluetooth/hci_core.c:4244 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 6778: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:336 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:180 [inline] vhci_write+0xb1/0x420 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1778 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 3946: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 skb_free_head net/core/skbuff.c:554 [inline] skb_release_data+0x5f6/0x820 net/core/skbuff.c:574 skb_release_all net/core/skbuff.c:631 [inline] __kfree_skb net/core/skbuff.c:645 [inline] consume_skb+0xe0/0x380 net/core/skbuff.c:705 netlink_broadcast_filtered+0x2ab/0x9e0 net/netlink/af_netlink.c:1489 netlink_broadcast net/netlink/af_netlink.c:1511 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0x126/0x170 net/netlink/af_netlink.c:2476 inet6_netconf_notify_devconf+0xc1/0x170 net/ipv6/addrconf.c:601 __addrconf_sysctl_register+0x2c2/0x380 net/ipv6/addrconf.c:6429 addrconf_sysctl_register+0x10d/0x1a0 net/ipv6/addrconf.c:6466 ipv6_add_dev.part.0+0x9b7/0xf70 net/ipv6/addrconf.c:460 ipv6_add_dev net/ipv6/addrconf.c:3520 [inline] addrconf_notify+0x85d/0x1c20 net/ipv6/addrconf.c:3373 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] register_netdevice+0xb98/0xe40 net/core/dev.c:7691 register_netdev+0x17/0x30 net/core/dev.c:7805 ip6gre_init_net+0x318/0x4e0 net/ipv6/ip6_gre.c:1192 ops_init+0xaa/0x3e0 net/core/net_namespace.c:118 setup_net+0x22f/0x530 net/core/net_namespace.c:295 copy_net_ns+0x19b/0x440 net/core/net_namespace.c:419 create_new_namespaces+0x375/0x720 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xa1/0x1d0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2412 [inline] SyS_unshare+0x308/0x7f0 kernel/fork.c:2362 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff88809325e040 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 12 bytes to the right of 512-byte region [ffff88809325e040, ffff88809325e240) The buggy address belongs to the page: page:ffffea00024c9780 count:1 mapcount:0 mapping:ffff88809325e040 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff88809325e040 0000000000000000 0000000100000006 raw: ffffea00024cc520 ffffea00025fed60 ffff88813fe80940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809325e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88809325e180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88809325e200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88809325e280: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88809325e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================