[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.164' (ECDSA) to the list of known hosts. 2021/01/27 15:18:32 fuzzer started 2021/01/27 15:18:32 connecting to host at 10.128.0.26:45991 2021/01/27 15:18:32 checking machine... 2021/01/27 15:18:32 checking revisions... 2021/01/27 15:18:33 testing simple program... syzkaller login: [ 69.096707][ T8425] IPVS: ftp: loaded support on port[0] = 21 [ 69.318071][ T8425] chnl_net:caif_netlink_parms(): no params data found [ 69.371745][ T8425] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.379955][ T8425] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.389712][ T8425] device bridge_slave_0 entered promiscuous mode [ 69.400598][ T8425] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.407882][ T8425] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.416542][ T8425] device bridge_slave_1 entered promiscuous mode [ 69.437358][ T8425] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.448336][ T8425] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.471503][ T8425] team0: Port device team_slave_0 added [ 69.478871][ T8425] team0: Port device team_slave_1 added [ 69.496174][ T8425] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 69.503327][ T8425] 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. [ 69.529760][ T8425] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 69.542668][ T8425] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 69.550595][ T8425] 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. [ 69.576632][ T8425] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 69.604132][ T8425] device hsr_slave_0 entered promiscuous mode [ 69.610773][ T8425] device hsr_slave_1 entered promiscuous mode [ 69.626531][ T8425] [ 69.628861][ T8425] ============================================ [ 69.635073][ T8425] WARNING: possible recursive locking detected [ 69.641203][ T8425] 5.11.0-rc5-next-20210127-syzkaller #0 Not tainted [ 69.647769][ T8425] -------------------------------------------- [ 69.653910][ T8425] syz-executor.0/8425 is trying to acquire lock: [ 69.660282][ T8425] ffff8881446785e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0x615/0x1180 [ 69.670931][ T8425] [ 69.670931][ T8425] but task is already holding lock: [ 69.678457][ T8425] ffff8881446785e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: virt_wifi_newlink+0x4cb/0x940 [ 69.688030][ T8425] [ 69.688030][ T8425] other info that might help us debug this: [ 69.696140][ T8425] Possible unsafe locking scenario: [ 69.696140][ T8425] [ 69.703755][ T8425] CPU0 [ 69.707071][ T8425] ---- [ 69.710329][ T8425] lock(&rdev->wiphy.mtx); [ 69.714810][ T8425] lock(&rdev->wiphy.mtx); [ 69.719432][ T8425] [ 69.719432][ T8425] *** DEADLOCK *** [ 69.719432][ T8425] [ 69.727556][ T8425] May be due to missing lock nesting notation [ 69.727556][ T8425] [ 69.735943][ T8425] 2 locks held by syz-executor.0/8425: [ 69.741379][ T8425] #0: ffffffff8cc71b08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 [ 69.750761][ T8425] #1: ffff8881446785e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: virt_wifi_newlink+0x4cb/0x940 [ 69.760679][ T8425] [ 69.760679][ T8425] stack backtrace: [ 69.766563][ T8425] CPU: 1 PID: 8425 Comm: syz-executor.0 Not tainted 5.11.0-rc5-next-20210127-syzkaller #0 [ 69.776429][ T8425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.786469][ T8425] Call Trace: [ 69.789737][ T8425] dump_stack+0x107/0x163 [ 69.794064][ T8425] __lock_acquire.cold+0x14c/0x3b4 [ 69.799454][ T8425] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.805458][ T8425] lock_acquire+0x1a8/0x720 [ 69.809952][ T8425] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 69.816200][ T8425] ? lock_release+0x710/0x710 [ 69.820879][ T8425] ? __lock_acquire+0x16b3/0x54c0 [ 69.825904][ T8425] __mutex_lock+0x134/0x1110 [ 69.830495][ T8425] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 69.836740][ T8425] ? cfg80211_netdev_notifier_call+0x615/0x1180 [ 69.842986][ T8425] ? mutex_lock_io_nested+0xf60/0xf60 [ 69.848347][ T8425] ? find_held_lock+0x2d/0x110 [ 69.853097][ T8425] ? __debug_object_init+0x409/0xd10 [ 69.858368][ T8425] ? mark_held_locks+0x9f/0xe0 [ 69.863162][ T8425] cfg80211_netdev_notifier_call+0x615/0x1180 [ 69.869382][ T8425] ? cfg80211_register_netdevice+0x2a0/0x2a0 [ 69.875379][ T8425] ? __devinet_sysctl_register+0x1ca/0x280 [ 69.881183][ T8425] ? debug_object_destroy+0x210/0x210 [ 69.886562][ T8425] ? lockdep_init_map_type+0x2c3/0x790 [ 69.892010][ T8425] ? lockdep_init_map_type+0x2c3/0x790 [ 69.897451][ T8425] ? add_grec+0x10e0/0x10e0 [ 69.901984][ T8425] ? __raw_spin_lock_init+0x36/0x110 [ 69.907254][ T8425] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 69.913480][ T8425] ? inetdev_init+0x2bb/0x4f0 [ 69.918141][ T8425] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 69.924373][ T8425] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 69.930671][ T8425] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 69.936894][ T8425] ? ipmr_device_event+0x1ab/0x220 [ 69.942035][ T8425] ? __sanitizer_cov_trace_switch+0x63/0xf0 [ 69.947914][ T8425] notifier_call_chain+0xb5/0x200 [ 69.952926][ T8425] call_netdevice_notifiers_info+0xb5/0x130 [ 69.958804][ T8425] register_netdevice+0x1034/0x14a0 [ 69.964002][ T8425] ? netdev_change_features+0xb0/0xb0 [ 69.969357][ T8425] ? kasan_unpoison+0x2c/0x50 [ 69.974034][ T8425] virt_wifi_newlink+0x4d3/0x940 [ 69.978955][ T8425] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 69.985178][ T8425] ? virt_wifi_rx_handler+0x320/0x320 [ 69.990532][ T8425] __rtnl_newlink+0x108b/0x16e0 [ 69.995384][ T8425] ? rtnl_setlink+0x3b0/0x3b0 [ 70.000045][ T8425] ? unwind_next_frame+0xe3b/0x1f90 [ 70.005225][ T8425] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.011291][ T8425] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 70.016999][ T8425] ? is_bpf_text_address+0xcb/0x160 [ 70.022199][ T8425] ? kernel_text_address+0xbd/0xf0 [ 70.027298][ T8425] ? __kernel_text_address+0x9/0x30 [ 70.032483][ T8425] ? unwind_get_return_address+0x51/0x90 [ 70.038107][ T8425] ? create_prof_cpu_mask+0x20/0x20 [ 70.043297][ T8425] ? arch_stack_walk+0x93/0xe0 [ 70.048050][ T8425] ? stack_trace_save+0x8c/0xc0 [ 70.052895][ T8425] ? fs_reclaim_release+0x9c/0xe0 [ 70.057932][ T8425] ? kasan_unpoison+0x2c/0x50 [ 70.062597][ T8425] rtnl_newlink+0x64/0xa0 [ 70.066914][ T8425] ? __rtnl_newlink+0x16e0/0x16e0 [ 70.071943][ T8425] rtnetlink_rcv_msg+0x44e/0xad0 [ 70.076868][ T8425] ? rtnetlink_put_metrics+0x510/0x510 [ 70.082316][ T8425] netlink_rcv_skb+0x153/0x420 [ 70.087066][ T8425] ? rtnetlink_put_metrics+0x510/0x510 [ 70.092510][ T8425] ? netlink_ack+0xaa0/0xaa0 [ 70.097081][ T8425] ? netlink_deliver_tap+0x227/0xb70 [ 70.102356][ T8425] ? _copy_from_iter_full+0x2fa/0x1120 [ 70.107803][ T8425] netlink_unicast+0x533/0x7d0 [ 70.112552][ T8425] ? netlink_attachskb+0x870/0x870 [ 70.117777][ T8425] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 70.124016][ T8425] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 70.130248][ T8425] ? __phys_addr_symbol+0x2c/0x70 [ 70.135262][ T8425] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 70.140969][ T8425] ? __check_object_size+0x171/0x3f0 [ 70.146261][ T8425] netlink_sendmsg+0x856/0xd90 [ 70.151016][ T8425] ? netlink_unicast+0x7d0/0x7d0 [ 70.155940][ T8425] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 70.162168][ T8425] ? netlink_unicast+0x7d0/0x7d0 [ 70.167107][ T8425] sock_sendmsg+0xcf/0x120 [ 70.171510][ T8425] __sys_sendto+0x21c/0x320 [ 70.176009][ T8425] ? __ia32_sys_getpeername+0xb0/0xb0 [ 70.181363][ T8425] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 70.187161][ T8425] ? debug_object_active_state+0x260/0x350 [ 70.192955][ T8425] ? kmem_cache_free+0x643/0x740 [ 70.197881][ T8425] ? blkcg_maybe_throttle_current+0x64d/0xd80 [ 70.203936][ T8425] ? __blkcg_punt_bio_submit+0x1d0/0x1d0 [ 70.209558][ T8425] __x64_sys_sendto+0xdd/0x1b0 [ 70.214308][ T8425] ? lockdep_hardirqs_on+0x79/0x100 [ 70.219494][ T8425] ? syscall_enter_from_user_mode+0x1d/0x50 [ 70.225391][ T8425] do_syscall_64+0x2d/0x70 [ 70.229794][ T8425] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.235671][ T8425] RIP: 0033:0x417c97 [ 70.239554][ T8425] 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 [ 70.259144][ T8425] RSP: 002b:00007ffd43a145b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 70.267541][ T8425] RAX: ffffffffffffffda RBX: 00000000016b4300 RCX: 0000000000417c97 [ 70.275496][ T8425] RDX: 000000000000004c RSI: 00000000016b4350 RDI: 0000000000000003 [ 70.283451][ T8425] RBP: 0000000000000000 R08: 00007ffd43a145c0 R09: 000000000000000c [ 70.291408][ T8425] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 70.299369][ T8425] R13: 0000000000000000 R14: 00000000016b4350 R15: 0000000000000003 executing program [ 71.133610][ T2943] Bluetooth: hci0: command 0x0409 tx timeout [ 73.213404][ T2943] Bluetooth: hci0: command 0x041b tx timeout executing program [ 75.293270][ T2943] Bluetooth: hci0: command 0x040f tx timeout executing program [ 77.373085][ T2943] Bluetooth: hci0: command 0x0419 tx timeout