[ 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 '10.128.0.242' (ECDSA) to the list of known hosts. 2020/09/05 20:25:55 parsed 1 programs 2020/09/05 20:25:55 executed programs: 0 syzkaller login: [ 1051.906429][ T6859] IPVS: ftp: loaded support on port[0] = 21 [ 1052.094779][ T6859] chnl_net:caif_netlink_parms(): no params data found [ 1052.152271][ T6859] bridge0: port 1(bridge_slave_0) entered blocking state [ 1052.159690][ T6859] bridge0: port 1(bridge_slave_0) entered disabled state [ 1052.168448][ T6859] device bridge_slave_0 entered promiscuous mode [ 1052.178480][ T6859] bridge0: port 2(bridge_slave_1) entered blocking state [ 1052.186050][ T6859] bridge0: port 2(bridge_slave_1) entered disabled state [ 1052.194579][ T6859] device bridge_slave_1 entered promiscuous mode [ 1052.216494][ T6859] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1052.227386][ T6859] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1052.252039][ T6859] team0: Port device team_slave_0 added [ 1052.259359][ T6859] team0: Port device team_slave_1 added [ 1052.278215][ T6859] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1052.285247][ T6859] 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. [ 1052.312059][ T6859] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1052.324967][ T6859] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1052.332463][ T6859] 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. [ 1052.358995][ T6859] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1052.387089][ T6859] device hsr_slave_0 entered promiscuous mode [ 1052.393808][ T6859] device hsr_slave_1 entered promiscuous mode [ 1052.494826][ T6859] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1052.505649][ T6859] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1052.520756][ T6859] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1052.532252][ T6859] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1052.558436][ T6859] bridge0: port 2(bridge_slave_1) entered blocking state [ 1052.565589][ T6859] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1052.573354][ T6859] bridge0: port 1(bridge_slave_0) entered blocking state [ 1052.580420][ T6859] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1052.627712][ T6859] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1052.644785][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1052.654979][ T6829] bridge0: port 1(bridge_slave_0) entered disabled state [ 1052.664139][ T6829] bridge0: port 2(bridge_slave_1) entered disabled state [ 1052.672401][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1052.685952][ T6859] 8021q: adding VLAN 0 to HW filter on device team0 [ 1052.697644][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1052.706860][ T6829] bridge0: port 1(bridge_slave_0) entered blocking state [ 1052.713974][ T6829] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1052.732427][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1052.742307][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 1052.749347][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1052.772781][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1052.782816][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1052.791782][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1052.799880][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1052.809443][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1052.821002][ T6859] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1052.838225][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1052.845686][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1052.860138][ T6859] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1052.878897][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1052.901579][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1052.909984][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1052.918703][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1052.928002][ T6859] device veth0_vlan entered promiscuous mode [ 1052.940755][ T6859] device veth1_vlan entered promiscuous mode [ 1052.964541][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1052.972607][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1052.981907][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1052.993239][ T6859] device veth0_macvtap entered promiscuous mode [ 1053.003039][ T6859] device veth1_macvtap entered promiscuous mode [ 1053.021974][ T6859] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1053.029311][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1053.040053][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1053.053549][ T6859] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1053.062500][ T6829] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1053.074824][ T6859] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1053.083591][ T6859] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1053.092406][ T6859] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1053.101219][ T6859] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1053.932054][ T6829] Bluetooth: hci0: command 0x0409 tx timeout [ 1056.001343][ T12] Bluetooth: hci0: command 0x041b tx timeout 2020/09/05 20:26:01 executed programs: 4 [ 1058.081539][ T6540] Bluetooth: hci0: command 0x040f tx timeout [ 1060.161125][ T7081] Bluetooth: hci0: command 0x0419 tx timeout 2020/09/05 20:26:07 executed programs: 11 [ 1062.241064][ T6540] Bluetooth: hci0: command 0x0405 tx timeout 2020/09/05 20:26:13 executed programs: 18 2020/09/05 20:26:18 executed programs: 25 2020/09/05 20:26:24 executed programs: 32 2020/09/05 20:26:30 executed programs: 39 2020/09/05 20:26:36 executed programs: 46 2020/09/05 20:26:41 executed programs: 53 [ 1099.441826][ T7081] ================================================================== [ 1099.450146][ T7081] BUG: KASAN: null-ptr-deref in l2cap_chan_put+0x28/0x230 [ 1099.457346][ T7081] Write of size 4 at addr 0000000000000018 by task kworker/0:2/7081 [ 1099.465329][ T7081] [ 1099.467642][ T7081] CPU: 0 PID: 7081 Comm: kworker/0:2 Not tainted 5.9.0-rc3-syzkaller #0 [ 1099.475963][ T7081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1099.486086][ T7081] Workqueue: events l2cap_chan_timeout [ 1099.491572][ T7081] Call Trace: [ 1099.494973][ T7081] dump_stack+0x198/0x1fd [ 1099.499289][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.504031][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.508871][ T7081] kasan_report.cold+0x5/0x37 [ 1099.513537][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.518287][ T7081] check_memory_region+0x13d/0x180 [ 1099.523383][ T7081] l2cap_chan_put+0x28/0x230 [ 1099.528011][ T7081] l2cap_sock_kill+0xbd/0x180 [ 1099.532711][ T7081] l2cap_chan_timeout+0x1c1/0x450 [ 1099.537823][ T7081] process_one_work+0x94c/0x1670 [ 1099.542828][ T7081] ? lock_release+0x8f0/0x8f0 [ 1099.547489][ T7081] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 1099.552856][ T7081] ? rwlock_bug.part.0+0x90/0x90 [ 1099.557866][ T7081] ? lockdep_hardirqs_off+0x96/0xd0 [ 1099.563052][ T7081] worker_thread+0x64c/0x1120 [ 1099.567731][ T7081] ? __kthread_parkme+0x13f/0x1e0 [ 1099.572751][ T7081] ? process_one_work+0x1670/0x1670 [ 1099.577927][ T7081] kthread+0x3b5/0x4a0 [ 1099.581978][ T7081] ? __kthread_bind_mask+0xc0/0xc0 [ 1099.587139][ T7081] ret_from_fork+0x1f/0x30 [ 1099.591546][ T7081] ================================================================== [ 1099.599593][ T7081] Disabling lock debugging due to kernel taint [ 1099.613125][ T7081] Kernel panic - not syncing: panic_on_warn set ... [ 1099.619733][ T7081] CPU: 0 PID: 7081 Comm: kworker/0:2 Tainted: G B 5.9.0-rc3-syzkaller #0 [ 1099.629426][ T7081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1099.639472][ T7081] Workqueue: events l2cap_chan_timeout [ 1099.644906][ T7081] Call Trace: [ 1099.648172][ T7081] dump_stack+0x198/0x1fd [ 1099.652481][ T7081] ? l2cap_add_psm+0x210/0x2c0 [ 1099.657269][ T7081] panic+0x347/0x7c0 [ 1099.661150][ T7081] ? __warn_printk+0xf3/0xf3 [ 1099.665725][ T7081] ? preempt_schedule_common+0x59/0xc0 [ 1099.671163][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.675921][ T7081] ? preempt_schedule_thunk+0x16/0x18 [ 1099.681316][ T7081] ? trace_hardirqs_on+0x55/0x220 [ 1099.686321][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.691055][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.695792][ T7081] end_report+0x4d/0x53 [ 1099.699936][ T7081] kasan_report.cold+0xd/0x37 [ 1099.704597][ T7081] ? l2cap_chan_put+0x28/0x230 [ 1099.709335][ T7081] check_memory_region+0x13d/0x180 [ 1099.714421][ T7081] l2cap_chan_put+0x28/0x230 [ 1099.718989][ T7081] l2cap_sock_kill+0xbd/0x180 [ 1099.723649][ T7081] l2cap_chan_timeout+0x1c1/0x450 [ 1099.728655][ T7081] process_one_work+0x94c/0x1670 [ 1099.733578][ T7081] ? lock_release+0x8f0/0x8f0 [ 1099.738254][ T7081] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 1099.743691][ T7081] ? rwlock_bug.part.0+0x90/0x90 [ 1099.748605][ T7081] ? lockdep_hardirqs_off+0x96/0xd0 [ 1099.753778][ T7081] worker_thread+0x64c/0x1120 [ 1099.758438][ T7081] ? __kthread_parkme+0x13f/0x1e0 [ 1099.763469][ T7081] ? process_one_work+0x1670/0x1670 [ 1099.768647][ T7081] kthread+0x3b5/0x4a0 [ 1099.772690][ T7081] ? __kthread_bind_mask+0xc0/0xc0 [ 1099.777784][ T7081] ret_from_fork+0x1f/0x30 [ 1099.783300][ T7081] Kernel Offset: disabled [ 1099.787611][ T7081] Rebooting in 86400 seconds..