[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts. 2021/01/22 19:28:15 fuzzer started 2021/01/22 19:28:16 connecting to host at 10.128.0.26:36159 2021/01/22 19:28:16 checking machine... 2021/01/22 19:28:16 checking revisions... 2021/01/22 19:28:16 testing simple program... syzkaller login: [ 69.879499][ T8478] IPVS: ftp: loaded support on port[0] = 21 [ 70.072056][ T8478] chnl_net:caif_netlink_parms(): no params data found [ 70.125825][ T8478] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.134725][ T8478] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.143887][ T8478] device bridge_slave_0 entered promiscuous mode [ 70.154499][ T8478] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.163063][ T8478] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.172147][ T8478] device bridge_slave_1 entered promiscuous mode [ 70.194430][ T8478] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.206445][ T8478] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.229603][ T8478] team0: Port device team_slave_0 added [ 70.237179][ T8478] team0: Port device team_slave_1 added [ 70.255096][ T8478] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.262357][ T8478] 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. [ 70.289277][ T8478] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.302548][ T8478] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.310649][ T8478] 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. [ 70.336994][ T8478] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.365087][ T8478] device hsr_slave_0 entered promiscuous mode [ 70.372329][ T8478] device hsr_slave_1 entered promiscuous mode [ 70.477400][ T8478] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.487909][ T8478] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.504906][ T8478] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.515791][ T8478] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.541035][ T8478] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.548243][ T8478] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.556016][ T8478] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.563260][ T8478] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.614442][ T8478] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.627773][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.640829][ T3190] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.650603][ T3190] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.660096][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 70.676475][ T8478] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.688414][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 70.697360][ T3202] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.704878][ T3202] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.717263][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 70.726012][ T3202] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.733752][ T3202] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.760675][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.770837][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.779695][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.788233][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.803411][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 70.814194][ T8478] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.835393][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.843034][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.856899][ T8478] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 70.876438][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 70.897692][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 70.906250][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 70.914347][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 70.926408][ T8478] device veth0_vlan entered promiscuous mode [ 70.939453][ T8478] device veth1_vlan entered promiscuous mode [ 70.963336][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 70.972659][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 70.981828][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 70.994286][ T8478] device veth0_macvtap entered promiscuous mode [ 71.004819][ T8478] device veth1_macvtap entered promiscuous mode [ 71.027614][ T8478] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.035362][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.045312][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.057660][ T8478] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.065990][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.075075][ T3190] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 71.088496][ T8478] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.097814][ T8478] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.107691][ T8478] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.117018][ T8478] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.217073][ T204] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.225780][ T204] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.253166][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 71.266919][ T136] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 71.276406][ T136] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 71.286789][ T3202] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/01/22 19:28:19 building call list... executing program [ 72.134384][ T24] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 72.410360][ T24] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 72.632077][ T24] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 72.846411][ T24] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 74.928229][ T8465] can: request_module (can-proto-0) failed. [ 75.414996][ T24] device hsr_slave_0 left promiscuous mode [ 75.422883][ T24] device hsr_slave_1 left promiscuous mode [ 75.430014][ T24] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 75.437579][ T24] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 75.447662][ T24] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 75.455918][ T24] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 75.465448][ T24] device bridge_slave_1 left promiscuous mode [ 75.473443][ T24] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.486672][ T24] device bridge_slave_0 left promiscuous mode [ 75.493157][ T24] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.509318][ T24] device veth1_macvtap left promiscuous mode [ 75.515561][ T24] device veth0_macvtap left promiscuous mode [ 75.522083][ T24] device veth1_vlan left promiscuous mode [ 75.528248][ T24] device veth0_vlan left promiscuous mode executing program [ 79.152086][ T24] ------------[ cut here ]------------ [ 79.158356][ T24] WARNING: CPU: 0 PID: 24 at net/wireless/core.c:1455 cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.169821][ T24] Modules linked in: [ 79.173868][ T24] CPU: 1 PID: 24 Comm: kworker/u4:1 Not tainted 5.11.0-rc4-next-20210122-syzkaller #0 [ 79.184310][ T24] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.196270][ T24] Workqueue: netns cleanup_net [ 79.202034][ T24] RIP: 0010:cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.211067][ T24] Code: be e4 3c f9 49 8d 7d 68 be ff ff ff ff e8 a0 cd c6 00 31 ff 89 c3 89 c6 e8 25 ec 3c f9 85 db 0f 85 64 f9 ff ff e8 98 e4 3c f9 <0f> 0b e9 58 f9 ff ff e8 8c e4 3c f9 49 8d 7d 68 be ff ff ff ff e8 [ 79.232341][ T24] RSP: 0018:ffffc90000def720 EFLAGS: 00010293 [ 79.240261][ T24] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 79.248558][ T24] RDX: ffff888010f13800 RSI: ffffffff883638c8 RDI: 0000000000000003 [ 79.256830][ T24] RBP: ffff8880288bc000 R08: 0000000000000000 R09: ffffffff88362cdd [ 79.264932][ T24] R10: ffffffff883638bb R11: 0000000000000006 R12: 1ffff920001bdee9 [ 79.273581][ T24] R13: ffff88801abfa580 R14: ffff88801b3c6000 R15: 0000000000000002 [ 79.282084][ T24] FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 79.291383][ T24] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.298423][ T24] CR2: 0000000000a9b158 CR3: 0000000013b32000 CR4: 00000000001506e0 [ 79.306836][ T24] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.315236][ T24] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.323680][ T24] Call Trace: [ 79.327137][ T24] ? mark_lock+0xef/0x17b0 [ 79.332243][ T24] ? cfg80211_register_wdev+0x320/0x320 [ 79.338325][ T24] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 79.344647][ T24] ? lock_chain_count+0x20/0x20 [ 79.349798][ T24] ? find_held_lock+0x2d/0x110 [ 79.354954][ T24] ? rt_flush_dev+0x1c9/0x260 [ 79.359770][ T24] ? mark_held_locks+0x9f/0xe0 [ 79.365148][ T24] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 79.371181][ T24] ? _find_next_bit.constprop.0+0x1a0/0x200 [ 79.377712][ T24] ? cpumask_next+0x3c/0x40 [ 79.382250][ T24] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 79.388250][ T24] ? rt_flush_dev+0x88/0x260 [ 79.393783][ T24] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 79.400416][ T24] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 79.406820][ T24] ? ipmr_device_event+0x1ab/0x220 [ 79.412466][ T24] notifier_call_chain+0xb5/0x200 [ 79.417946][ T24] call_netdevice_notifiers_info+0xb5/0x130 [ 79.424347][ T24] unregister_netdevice_many+0x943/0x1750 [ 79.430627][ T24] ? net_tx_action+0xbf0/0xbf0 [ 79.436256][ T24] ? unregister_netdevice_many+0x1750/0x1750 [ 79.442974][ T24] ? sysfs_remove_group+0xc2/0x170 [ 79.449045][ T24] ? br_dev_delete+0x112/0x190 [ 79.453844][ T24] default_device_exit_batch+0x2fa/0x3c0 [ 79.459935][ T24] ? unregister_netdev+0x20/0x20 [ 79.464954][ T24] ? __init_waitqueue_head+0xd0/0xd0 [ 79.470991][ T24] ? cfg802154_switch_netns+0x440/0x440 [ 79.476813][ T24] ? unregister_netdev+0x20/0x20 [ 79.482139][ T24] ? dev_change_net_namespace+0x1200/0x1200 [ 79.488210][ T24] ops_exit_list+0x10d/0x160 [ 79.492887][ T24] cleanup_net+0x4ea/0xb10 [ 79.498569][ T24] ? ops_free_list.part.0+0x3d0/0x3d0 [ 79.503999][ T24] process_one_work+0x98d/0x15f0 [ 79.509891][ T24] ? pwq_dec_nr_in_flight+0x320/0x320 [ 79.515805][ T24] ? rwlock_bug.part.0+0x90/0x90 [ 79.521602][ T24] ? _raw_spin_lock_irq+0x41/0x50 [ 79.527384][ T24] worker_thread+0x64c/0x1120 [ 79.533299][ T24] ? process_one_work+0x15f0/0x15f0 [ 79.539987][ T24] kthread+0x3b1/0x4a0 [ 79.544267][ T24] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 79.551998][ T24] ret_from_fork+0x1f/0x30 [ 79.556764][ T24] Kernel panic - not syncing: panic_on_warn set ... [ 79.564120][ T24] CPU: 1 PID: 24 Comm: kworker/u4:1 Not tainted 5.11.0-rc4-next-20210122-syzkaller #0 [ 79.574147][ T24] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.585364][ T24] Workqueue: netns cleanup_net [ 79.590234][ T24] Call Trace: [ 79.593822][ T24] dump_stack+0x107/0x163 [ 79.598619][ T24] panic+0x306/0x73d [ 79.602918][ T24] ? __warn_printk+0xf3/0xf3 [ 79.607850][ T24] ? __warn.cold+0x1a/0x44 [ 79.612814][ T24] ? cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.619558][ T24] __warn.cold+0x35/0x44 [ 79.624116][ T24] ? cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.630585][ T24] report_bug+0x1bd/0x210 [ 79.635329][ T24] handle_bug+0x3c/0x60 [ 79.639988][ T24] exc_invalid_op+0x14/0x40 [ 79.644529][ T24] asm_exc_invalid_op+0x12/0x20 [ 79.649588][ T24] RIP: 0010:cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.656520][ T24] Code: be e4 3c f9 49 8d 7d 68 be ff ff ff ff e8 a0 cd c6 00 31 ff 89 c3 89 c6 e8 25 ec 3c f9 85 db 0f 85 64 f9 ff ff e8 98 e4 3c f9 <0f> 0b e9 58 f9 ff ff e8 8c e4 3c f9 49 8d 7d 68 be ff ff ff ff e8 [ 79.677260][ T24] RSP: 0018:ffffc90000def720 EFLAGS: 00010293 [ 79.683578][ T24] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 79.691872][ T24] RDX: ffff888010f13800 RSI: ffffffff883638c8 RDI: 0000000000000003 [ 79.700240][ T24] RBP: ffff8880288bc000 R08: 0000000000000000 R09: ffffffff88362cdd [ 79.709027][ T24] R10: ffffffff883638bb R11: 0000000000000006 R12: 1ffff920001bdee9 [ 79.718210][ T24] R13: ffff88801abfa580 R14: ffff88801b3c6000 R15: 0000000000000002 [ 79.726373][ T24] ? cfg80211_netdev_notifier_call+0xd3b/0x1460 [ 79.732745][ T24] ? cfg80211_netdev_notifier_call+0x15d/0x1460 [ 79.739044][ T24] ? cfg80211_netdev_notifier_call+0xd48/0x1460 [ 79.745459][ T24] ? mark_lock+0xef/0x17b0 [ 79.749894][ T24] ? cfg80211_register_wdev+0x320/0x320 [ 79.755607][ T24] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 79.761879][ T24] ? lock_chain_count+0x20/0x20 [ 79.767075][ T24] ? find_held_lock+0x2d/0x110 [ 79.772442][ T24] ? rt_flush_dev+0x1c9/0x260 [ 79.777217][ T24] ? mark_held_locks+0x9f/0xe0 [ 79.782520][ T24] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 79.788677][ T24] ? _find_next_bit.constprop.0+0x1a0/0x200 [ 79.795193][ T24] ? cpumask_next+0x3c/0x40 [ 79.799796][ T24] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 79.805550][ T24] ? rt_flush_dev+0x88/0x260 [ 79.810147][ T24] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 79.816395][ T24] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 79.822672][ T24] ? ipmr_device_event+0x1ab/0x220 [ 79.827887][ T24] notifier_call_chain+0xb5/0x200 [ 79.833102][ T24] call_netdevice_notifiers_info+0xb5/0x130 [ 79.839193][ T24] unregister_netdevice_many+0x943/0x1750 [ 79.845044][ T24] ? net_tx_action+0xbf0/0xbf0 [ 79.850816][ T24] ? unregister_netdevice_many+0x1750/0x1750 [ 79.857549][ T24] ? sysfs_remove_group+0xc2/0x170 [ 79.863002][ T24] ? br_dev_delete+0x112/0x190 [ 79.867917][ T24] default_device_exit_batch+0x2fa/0x3c0 [ 79.873586][ T24] ? unregister_netdev+0x20/0x20 [ 79.878953][ T24] ? __init_waitqueue_head+0xd0/0xd0 [ 79.884622][ T24] ? cfg802154_switch_netns+0x440/0x440 [ 79.890211][ T24] ? unregister_netdev+0x20/0x20 [ 79.895327][ T24] ? dev_change_net_namespace+0x1200/0x1200 [ 79.901230][ T24] ops_exit_list+0x10d/0x160 [ 79.906308][ T24] cleanup_net+0x4ea/0xb10 [ 79.910969][ T24] ? ops_free_list.part.0+0x3d0/0x3d0 [ 79.916468][ T24] process_one_work+0x98d/0x15f0 [ 79.921675][ T24] ? pwq_dec_nr_in_flight+0x320/0x320 [ 79.927555][ T24] ? rwlock_bug.part.0+0x90/0x90 [ 79.932911][ T24] ? _raw_spin_lock_irq+0x41/0x50 [ 79.938310][ T24] worker_thread+0x64c/0x1120 [ 79.943234][ T24] ? process_one_work+0x15f0/0x15f0 [ 79.948701][ T24] kthread+0x3b1/0x4a0 [ 79.953625][ T24] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 79.960264][ T24] ret_from_fork+0x1f/0x30 [ 79.966247][ T24] Kernel Offset: disabled [ 79.970855][ T24] Rebooting in 86400 seconds..