[ 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 '10.128.0.13' (ECDSA) to the list of known hosts. 2020/08/24 08:52:19 parsed 1 programs 2020/08/24 08:52:20 executed programs: 0 syzkaller login: [ 1582.901084][ T28] audit: type=1400 audit(1598259140.017:8): avc: denied { execmem } for pid=6860 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 1584.072949][ T6861] IPVS: ftp: loaded support on port[0] = 21 [ 1584.269826][ T6861] chnl_net:caif_netlink_parms(): no params data found [ 1584.350142][ T6861] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.357671][ T6861] bridge0: port 1(bridge_slave_0) entered disabled state [ 1584.366272][ T6861] device bridge_slave_0 entered promiscuous mode [ 1584.376215][ T6861] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.383387][ T6861] bridge0: port 2(bridge_slave_1) entered disabled state [ 1584.391940][ T6861] device bridge_slave_1 entered promiscuous mode [ 1584.414559][ T6861] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1584.425373][ T6861] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1584.447897][ T6861] team0: Port device team_slave_0 added [ 1584.457165][ T6861] team0: Port device team_slave_1 added [ 1584.474983][ T6861] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1584.482108][ T6861] 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. [ 1584.508195][ T6861] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1584.520988][ T6861] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1584.528874][ T6861] 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. [ 1584.554973][ T6861] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1584.582652][ T6861] device hsr_slave_0 entered promiscuous mode [ 1584.590275][ T6861] device hsr_slave_1 entered promiscuous mode [ 1584.691894][ T6861] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1584.702006][ T6861] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1584.713310][ T6861] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1584.724569][ T6861] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1584.752205][ T6861] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.759477][ T6861] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.767462][ T6861] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.774752][ T6861] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.823285][ T6861] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1584.838655][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1584.849508][ T2596] bridge0: port 1(bridge_slave_0) entered disabled state [ 1584.858351][ T2596] bridge0: port 2(bridge_slave_1) entered disabled state [ 1584.866534][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1584.880473][ T6861] 8021q: adding VLAN 0 to HW filter on device team0 [ 1584.892160][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1584.901214][ T6838] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.908355][ T6838] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.925097][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1584.934148][ T2596] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.941185][ T2596] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.965252][ T7002] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1584.975896][ T7002] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1584.984258][ T7002] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1584.999207][ T6861] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1585.011131][ T6861] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1585.020736][ T7002] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1585.028919][ T7002] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1585.048645][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1585.056701][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1585.071174][ T6861] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1585.090839][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1585.111435][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1585.121112][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1585.129582][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1585.140605][ T6861] device veth0_vlan entered promiscuous mode [ 1585.153314][ T6861] device veth1_vlan entered promiscuous mode [ 1585.176311][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1585.184845][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1585.192953][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1585.205511][ T6861] device veth0_macvtap entered promiscuous mode [ 1585.217070][ T6861] device veth1_macvtap entered promiscuous mode [ 1585.236226][ T6861] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1585.245627][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1585.256154][ T6838] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1585.267992][ T6861] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1585.276260][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1585.285975][ T2596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1585.298006][ T6861] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1585.309343][ T6861] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1585.318216][ T6861] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1585.327039][ T6861] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1586.075591][ T6830] Bluetooth: hci0: command 0x0409 tx timeout [ 1586.205280][ T6861] ================================================================== [ 1586.213575][ T6861] BUG: KASAN: use-after-free in __lock_acquire+0x41d0/0x5640 [ 1586.220944][ T6861] Read of size 8 at addr ffff8880a20040a0 by task syz-executor.0/6861 [ 1586.229087][ T6861] [ 1586.231513][ T6861] CPU: 1 PID: 6861 Comm: syz-executor.0 Not tainted 5.9.0-rc1-syzkaller #0 [ 1586.240081][ T6861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1586.250192][ T6861] Call Trace: [ 1586.253566][ T6861]