Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. 2021/01/27 21:13:22 fuzzer started 2021/01/27 21:13:22 connecting to host at 10.128.0.26:38227 2021/01/27 21:13:22 checking machine... 2021/01/27 21:13:22 checking revisions... 2021/01/27 21:13:22 testing simple program... syzkaller login: [ 72.299655][ T8451] IPVS: ftp: loaded support on port[0] = 21 [ 72.511586][ T8451] chnl_net:caif_netlink_parms(): no params data found [ 72.566252][ T8451] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.575359][ T8451] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.585137][ T8451] device bridge_slave_0 entered promiscuous mode [ 72.594953][ T8451] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.602731][ T8451] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.610650][ T8451] device bridge_slave_1 entered promiscuous mode [ 72.632473][ T8451] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.644331][ T8451] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.668513][ T8451] team0: Port device team_slave_0 added [ 72.676159][ T8451] team0: Port device team_slave_1 added [ 72.695651][ T8451] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.702716][ T8451] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 72.728881][ T8451] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.742353][ T8451] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.749529][ T8451] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 72.776388][ T8451] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.804156][ T8451] device hsr_slave_0 entered promiscuous mode [ 72.811366][ T8451] device hsr_slave_1 entered promiscuous mode [ 72.829622][ T8451] [ 72.832165][ T8451] ============================================ [ 72.838298][ T8451] WARNING: possible recursive locking detected [ 72.844430][ T8451] 5.11.0-rc5-next-20210127-syzkaller #0 Not tainted [ 72.851003][ T8451] -------------------------------------------- [ 72.857332][ T8451] syz-executor.0/8451 is trying to acquire lock: [ 72.863657][ T8451] ffff88801b13a5e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0x615/0x1180 [ 72.874269][ T8451] [ 72.874269][ T8451] but task is already holding lock: [ 72.881620][ T8451] ffff88801b13a5e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: virt_wifi_newlink+0x4cb/0x940 [ 72.891493][ T8451] [ 72.891493][ T8451] other info that might help us debug this: [ 72.899898][ T8451] Possible unsafe locking scenario: [ 72.899898][ T8451] [ 72.907397][ T8451] CPU0 [ 72.910749][ T8451] ---- [ 72.914138][ T8451] lock(&rdev->wiphy.mtx); [ 72.918647][ T8451] lock(&rdev->wiphy.mtx); [ 72.923221][ T8451] [ 72.923221][ T8451] *** DEADLOCK *** [ 72.923221][ T8451] [ 72.931433][ T8451] May be due to missing lock nesting notation [ 72.931433][ T8451] [ 72.939843][ T8451] 2 locks held by syz-executor.0/8451: [ 72.945377][ T8451] #0: ffffffff8cc71b08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 [ 72.954857][ T8451] #1: ffff88801b13a5e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: virt_wifi_newlink+0x4cb/0x940 [ 72.964954][ T8451] [ 72.964954][ T8451] stack backtrace: [ 72.970970][ T8451] CPU: 0 PID: 8451 Comm: syz-executor.0 Not tainted 5.11.0-rc5-next-20210127-syzkaller #0 [ 72.980998][ T8451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.991329][ T8451] Call Trace: [ 72.994601][ T8451] dump_stack+0x107/0x163 [ 72.998934][ T8451] __lock_acquire.cold+0x14c/0x3b4 [ 73.004056][ T8451] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.010042][ T8451] lock_acquire+0x1a8/0x720 [ 73.014623][ T8451] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 73.020951][ T8451] ? lock_release+0x710/0x710 [ 73.025744][ T8451] ? __lock_acquire+0x16b3/0x54c0 [ 73.031177][ T8451] __mutex_lock+0x134/0x1110 [ 73.035832][ T8451] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 73.042070][ T8451] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 73.048310][ T8451] ? mutex_lock_io_nested+0xf60/0xf60 [ 73.053876][ T8451] ? find_held_lock+0x2d/0x110 [ 73.058645][ T8451] ? __debug_object_init+0x409/0xd10 [ 73.063936][ T8451] ? mark_held_locks+0x9f/0xe0 [ 73.068801][ T8451] cfg80211_netdev_notifier_call+0x615/0x1180 [ 73.074970][ T8451] ? cfg80211_register_netdevice+0x2a0/0x2a0 [ 73.081049][ T8451] ? __devinet_sysctl_register+0x1ca/0x280 [ 73.087110][ T8451] ? debug_object_destroy+0x210/0x210 [ 73.092471][ T8451] ? lockdep_init_map_type+0x2c3/0x790 [ 73.098003][ T8451] ? lockdep_init_map_type+0x2c3/0x790 [ 73.103534][ T8451] ? add_grec+0x10e0/0x10e0 [ 73.108133][ T8451] ? __raw_spin_lock_init+0x36/0x110 [ 73.113508][ T8451] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.119738][ T8451] ? inetdev_init+0x2bb/0x4f0 [ 73.124948][ T8451] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.131179][ T8451] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.138032][ T8451] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.144396][ T8451] ? ipmr_device_event+0x1ab/0x220 [ 73.149858][ T8451] ? __sanitizer_cov_trace_switch+0x63/0xf0 [ 73.156509][ T8451] notifier_call_chain+0xb5/0x200 [ 73.161888][ T8451] call_netdevice_notifiers_info+0xb5/0x130 [ 73.167956][ T8451] register_netdevice+0x1034/0x14a0 [ 73.173727][ T8451] ? netdev_change_features+0xb0/0xb0 [ 73.183788][ T8451] ? kasan_unpoison+0x2c/0x50 [ 73.188906][ T8451] virt_wifi_newlink+0x4d3/0x940 [ 73.194343][ T8451] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 73.200849][ T8451] ? virt_wifi_rx_handler+0x320/0x320 [ 73.206312][ T8451] __rtnl_newlink+0x108b/0x16e0 [ 73.211158][ T8451] ? rtnl_setlink+0x3b0/0x3b0 [ 73.215842][ T8451] ? unwind_next_frame+0xe3b/0x1f90 [ 73.221044][ T8451] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.227472][ T8451] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 73.233185][ T8451] ? is_bpf_text_address+0xcb/0x160 [ 73.238460][ T8451] ? kernel_text_address+0xbd/0xf0 [ 73.243567][ T8451] ? __kernel_text_address+0x9/0x30 [ 73.248776][ T8451] ? unwind_get_return_address+0x51/0x90 [ 73.254670][ T8451] ? create_prof_cpu_mask+0x20/0x20 [ 73.259968][ T8451] ? arch_stack_walk+0x93/0xe0 [ 73.264911][ T8451] ? stack_trace_save+0x8c/0xc0 [ 73.269861][ T8451] ? fs_reclaim_release+0x9c/0xe0 [ 73.275996][ T8451] ? kasan_unpoison+0x2c/0x50 [ 73.281007][ T8451] rtnl_newlink+0x64/0xa0 [ 73.285623][ T8451] ? __rtnl_newlink+0x16e0/0x16e0 [ 73.290906][ T8451] rtnetlink_rcv_msg+0x44e/0xad0 [ 73.296115][ T8451] ? rtnetlink_put_metrics+0x510/0x510 [ 73.301770][ T8451] netlink_rcv_skb+0x153/0x420 [ 73.306526][ T8451] ? rtnetlink_put_metrics+0x510/0x510 [ 73.311984][ T8451] ? netlink_ack+0xaa0/0xaa0 [ 73.316851][ T8451] ? netlink_deliver_tap+0x227/0xb70 [ 73.322233][ T8451] ? _copy_from_iter_full+0x2fa/0x1120 [ 73.327808][ T8451] netlink_unicast+0x533/0x7d0 [ 73.332982][ T8451] ? netlink_attachskb+0x870/0x870 [ 73.338430][ T8451] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.345318][ T8451] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.351767][ T8451] ? __phys_addr_symbol+0x2c/0x70 [ 73.357254][ T8451] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 73.362979][ T8451] ? __check_object_size+0x171/0x3f0 [ 73.368358][ T8451] netlink_sendmsg+0x856/0xd90 [ 73.373120][ T8451] ? netlink_unicast+0x7d0/0x7d0 [ 73.378133][ T8451] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.384539][ T8451] ? netlink_unicast+0x7d0/0x7d0 [ 73.389475][ T8451] sock_sendmsg+0xcf/0x120 [ 73.393890][ T8451] __sys_sendto+0x21c/0x320 [ 73.398476][ T8451] ? __ia32_sys_getpeername+0xb0/0xb0 [ 73.403835][ T8451] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 73.409630][ T8451] ? debug_object_active_state+0x260/0x350 [ 73.415425][ T8451] ? kmem_cache_free+0x643/0x740 [ 73.420788][ T8451] ? blkcg_maybe_throttle_current+0x64d/0xd80 [ 73.426850][ T8451] ? __blkcg_punt_bio_submit+0x1d0/0x1d0 [ 73.432569][ T8451] __x64_sys_sendto+0xdd/0x1b0 [ 73.437580][ T8451] ? lockdep_hardirqs_on+0x79/0x100 [ 73.443232][ T8451] ? syscall_enter_from_user_mode+0x1d/0x50 [ 73.449329][ T8451] do_syscall_64+0x2d/0x70 [ 73.453776][ T8451] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.459664][ T8451] RIP: 0033:0x417c97 [ 73.463549][ T8451] Code: 2c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 e7 fa ff ff 48 89 04 24 49 89 ca b8 2c 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 2d fb ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 73.483344][ T8451] RSP: 002b:00007ffdaf80f3e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 73.492488][ T8451] RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 [ 73.501159][ T8451] RDX: 000000000000004c RSI: 00000000016b4350 RDI: 0000000000000003 [ 73.509548][ T8451] RBP: 0000000000000000 R08: 00007ffdaf80f3f0 R09: 000000000000000c [ 73.517694][ T8451] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 73.525663][ T8451] R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 executing program [ 74.320956][ T19] Bluetooth: hci0: command 0x0409 tx timeout [ 76.400767][ T19] Bluetooth: hci0: command 0x041b tx timeout executing program [ 78.480587][ T19] Bluetooth: hci0: command 0x040f tx timeout executing program [ 80.560455][ T19] Bluetooth: hci0: command 0x0419 tx timeout