Bluetooth: hci4: advertising data len corrected Bluetooth: hci4: advertising data len corrected Bluetooth: Unknown advertising packet type: 0xde Bluetooth: Unknown advertising packet type: 0x100 ================================================================== 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 ffff8880b299cd09 by task kworker/u5:3/8137 CPU: 0 PID: 8137 Comm: kworker/u5:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 dccp_invalid_packet: P.Data Offset(0) too small Workqueue: hci4 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 dccp_invalid_packet: P.Data Offset(0) too small 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 dccp_invalid_packet: P.Data Offset(0) too small hci_event_packet+0x34ad/0x7e20 net/bluetooth/hci_event.c:5959 batman_adv: batadv0: Interface deactivated: batadv_slave_0 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 13391: __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 batman_adv: batadv0: Removing interface: batadv_slave_0 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 9713: __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] consume_skb+0x113/0x3d0 net/core/skbuff.c:714 xt_CT: You must specify a L4 protocol and not use inversions on it __dev_kfree_skb_any+0x9c/0xc0 net/core/dev.c:2796 dev_consume_skb_any include/linux/netdevice.h:3567 [inline] napi_consume_skb+0x45d/0x5e0 net/core/skbuff.c:778 free_old_xmit_skbs+0xea/0x270 drivers/net/virtio_net.c:1395 start_xmit+0x156/0x17a0 drivers/net/virtio_net.c:1611 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:395 [inline] __qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:3451 [inline] __dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 __tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3643 __tcp_send_ack net/ipv4/tcp_output.c:3649 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3649 tcp_cleanup_rbuf+0x30f/0x600 net/ipv4/tcp.c:1604 tcp_recvmsg+0xa8c/0x2a90 net/ipv4/tcp.c:2177 inet_recvmsg+0x124/0x5c0 net/ipv4/af_inet.c:830 sock_recvmsg_nosec net/socket.c:859 [inline] sock_recvmsg net/socket.c:866 [inline] sock_recvmsg net/socket.c:862 [inline] sock_read_iter+0x339/0x470 net/socket.c:944 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880b299c900 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 9 bytes to the right of 1024-byte region [ffff8880b299c900, ffff8880b299cd00) The buggy address belongs to the page: page:ffffea0002ca6700 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0xffff8880b299c000 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea00025ba888 ffffea0002bc9d88 ffff88813bff0ac0 raw: ffff8880b299c000 ffff8880b299c000 0000000100000004 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b299cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880b299cc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880b299cd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880b299cd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880b299ce00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== batman_adv: batadv0: Interface deactivated: batadv_slave_1