[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 107.023958][ T33] audit: type=1800 audit(1583864169.072:25): pid=11351 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 107.054565][ T33] audit: type=1800 audit(1583864169.092:26): pid=11351 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 107.101959][ T33] audit: type=1800 audit(1583864169.132:27): pid=11351 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. syzkaller login: [ 118.894405][T11501] IPVS: ftp: loaded support on port[0] = 21 [ 118.983589][T11501] chnl_net:caif_netlink_parms(): no params data found [ 119.061504][T11501] bridge0: port 1(bridge_slave_0) entered blocking state [ 119.069203][T11501] bridge0: port 1(bridge_slave_0) entered disabled state [ 119.078114][T11501] device bridge_slave_0 entered promiscuous mode [ 119.087068][T11501] bridge0: port 2(bridge_slave_1) entered blocking state [ 119.094637][T11501] bridge0: port 2(bridge_slave_1) entered disabled state [ 119.103876][T11501] device bridge_slave_1 entered promiscuous mode [ 119.131519][T11501] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 119.144499][T11501] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 119.171354][T11501] team0: Port device team_slave_0 added [ 119.180069][T11501] team0: Port device team_slave_1 added [ 119.202170][T11501] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 119.209384][T11501] 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. [ 119.236246][T11501] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 119.248442][T11501] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 119.255640][T11501] 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. [ 119.286006][T11501] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 119.355610][T11501] device hsr_slave_0 entered promiscuous mode [ 119.402946][T11501] device hsr_slave_1 entered promiscuous mode [ 119.550928][T11501] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 119.606392][T11501] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 119.666618][T11501] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 119.726754][T11501] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 119.808975][T11501] bridge0: port 2(bridge_slave_1) entered blocking state [ 119.816292][T11501] bridge0: port 2(bridge_slave_1) entered forwarding state [ 119.824285][T11501] bridge0: port 1(bridge_slave_0) entered blocking state [ 119.831461][T11501] bridge0: port 1(bridge_slave_0) entered forwarding state [ 119.894662][T11501] 8021q: adding VLAN 0 to HW filter on device bond0 [ 119.910874][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 119.924560][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 119.934100][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 119.944947][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 119.961476][T11501] 8021q: adding VLAN 0 to HW filter on device team0 [ 119.977501][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 119.987478][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 119.996871][ T31] bridge0: port 1(bridge_slave_0) entered blocking state [ 120.004200][ T31] bridge0: port 1(bridge_slave_0) entered forwarding state [ 120.019089][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 120.029042][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 120.038608][T11507] bridge0: port 2(bridge_slave_1) entered blocking state [ 120.046334][T11507] bridge0: port 2(bridge_slave_1) entered forwarding state [ 120.059795][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 120.083567][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 120.094374][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 120.105034][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 120.114698][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 120.124098][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 120.142363][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 120.152221][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 120.161754][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 120.177728][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 120.186865][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 120.200351][T11501] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 120.223672][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 120.231386][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 120.249677][T11501] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 120.276325][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 120.285939][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 120.315089][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 120.324599][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 120.337463][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 120.346678][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 120.358409][T11501] device veth0_vlan entered promiscuous mode [ 120.374399][T11501] device veth1_vlan entered promiscuous mode [ 120.403601][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 120.412946][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 120.421748][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 120.431317][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 120.447196][T11501] device veth0_macvtap entered promiscuous mode [ 120.459806][T11501] device veth1_macvtap entered promiscuous mode [ 120.485079][T11501] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 120.492849][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 120.502883][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 120.511478][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 120.522513][T11507] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 120.538964][T11501] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 120.547079][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 120.556627][ T3398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 120.793188][ C1] ===================================================== [ 120.800269][ C1] BUG: KMSAN: use-after-free in find_match+0x317/0x1480 [ 120.807192][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.6.0-rc2-syzkaller #0 [ 120.815330][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.825408][ C1] Call Trace: [ 120.828683][ C1] dump_stack+0x1c9/0x220 [ 120.833005][ C1] kmsan_report+0xf7/0x1e0 [ 120.837403][ C1] __msan_warning+0x58/0xa0 [ 120.841898][ C1] find_match+0x317/0x1480 [ 120.846311][ C1] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 120.852444][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 120.857644][ C1] __find_rr_leaf+0x3f9/0x1160 [ 120.862427][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 120.867541][ C1] fib6_table_lookup+0x586/0x1420 [ 120.872588][ C1] ip6_pol_route+0x203/0x2960 [ 120.877283][ C1] ip6_pol_route_input+0x123/0x140 [ 120.882657][ C1] fib6_rule_lookup+0x38f/0xa10 [ 120.887509][ C1] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 120.893250][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 120.898509][ C1] ip6_route_input+0xb9d/0xcf0 [ 120.903782][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 120.908983][ C1] ip6_rcv_finish_core+0x1f9/0x470 [ 120.914088][ C1] ipv6_rcv+0x628/0x710 [ 120.918238][ C1] ? local_bh_enable+0x40/0x40 [ 120.923040][ C1] process_backlog+0xa41/0x1410 [ 120.927881][ C1] ? __list_add_valid+0xb8/0x420 [ 120.932804][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 120.937901][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 120.943084][ C1] ? rps_trigger_softirq+0x2e0/0x2e0 [ 120.948347][ C1] net_rx_action+0x786/0x1aa0 [ 120.953070][ C1] ? net_tx_action+0xc30/0xc30 [ 120.957816][ C1] __do_softirq+0x311/0x83d [ 120.962323][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 120.967509][ C1] ? takeover_tasklets+0x8f0/0x8f0 [ 120.972599][ C1] run_ksoftirqd+0x25/0x40 [ 120.976997][ C1] smpboot_thread_fn+0x493/0x980 [ 120.981977][ C1] kthread+0x4b5/0x4f0 [ 120.986062][ C1] ? cpu_report_death+0x180/0x180 [ 120.991120][ C1] ? kthread_blkcg+0xf0/0xf0 [ 120.995710][ C1] ret_from_fork+0x35/0x40 [ 121.000116][ C1] [ 121.002424][ C1] Uninit was created at: [ 121.006654][ C1] kmsan_internal_poison_shadow+0x66/0xd0 [ 121.012350][ C1] kmsan_slab_free+0x6e/0xb0 [ 121.016918][ C1] kfree+0x565/0x30a0 [ 121.020881][ C1] netdev_name_node_alt_destroy+0x587/0x690 [ 121.026753][ C1] rtnl_linkprop+0x939/0xc00 [ 121.031324][ C1] rtnl_dellinkprop+0x9d/0xb0 [ 121.035981][ C1] rtnetlink_rcv_msg+0x1153/0x1570 [ 121.041078][ C1] netlink_rcv_skb+0x451/0x650 [ 121.045822][ C1] rtnetlink_rcv+0x50/0x60 [ 121.050216][ C1] netlink_unicast+0xf9e/0x1100 [ 121.055043][ C1] netlink_sendmsg+0x1246/0x14d0 [ 121.060042][ C1] ____sys_sendmsg+0x12b6/0x1350 [ 121.064956][ C1] __sys_sendmsg+0x451/0x5f0 [ 121.069521][ C1] __se_sys_sendmsg+0x97/0xb0 [ 121.074186][ C1] __x64_sys_sendmsg+0x4a/0x70 [ 121.078939][ C1] do_syscall_64+0xb8/0x160 [ 121.083420][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 121.089284][ C1] ===================================================== [ 121.096194][ C1] Disabling lock debugging due to kernel taint [ 121.102323][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 121.108901][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 121.118599][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.128633][ C1] Call Trace: [ 121.131910][ C1] dump_stack+0x1c9/0x220 [ 121.136453][ C1] panic+0x3d5/0xc3e [ 121.140382][ C1] kmsan_report+0x1df/0x1e0 [ 121.144890][ C1] __msan_warning+0x58/0xa0 [ 121.149403][ C1] find_match+0x317/0x1480 [ 121.153837][ C1] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 121.159971][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 121.165170][ C1] __find_rr_leaf+0x3f9/0x1160 [ 121.170039][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 121.175196][ C1] fib6_table_lookup+0x586/0x1420 [ 121.180281][ C1] ip6_pol_route+0x203/0x2960 [ 121.184965][ C1] ip6_pol_route_input+0x123/0x140 [ 121.190104][ C1] fib6_rule_lookup+0x38f/0xa10 [ 121.194940][ C1] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 121.200517][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 121.205725][ C1] ip6_route_input+0xb9d/0xcf0 [ 121.210484][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 121.215693][ C1] ip6_rcv_finish_core+0x1f9/0x470 [ 121.221224][ C1] ipv6_rcv+0x628/0x710 [ 121.225390][ C1] ? local_bh_enable+0x40/0x40 [ 121.230146][ C1] process_backlog+0xa41/0x1410 [ 121.235007][ C1] ? __list_add_valid+0xb8/0x420 [ 121.239945][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 121.245151][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 121.250343][ C1] ? rps_trigger_softirq+0x2e0/0x2e0 [ 121.255625][ C1] net_rx_action+0x786/0x1aa0 [ 121.260304][ C1] ? net_tx_action+0xc30/0xc30 [ 121.265051][ C1] __do_softirq+0x311/0x83d [ 121.269554][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 121.274811][ C1] ? takeover_tasklets+0x8f0/0x8f0 [ 121.280035][ C1] run_ksoftirqd+0x25/0x40 [ 121.284456][ C1] smpboot_thread_fn+0x493/0x980 [ 121.289390][ C1] kthread+0x4b5/0x4f0 [ 121.293441][ C1] ? cpu_report_death+0x180/0x180 [ 121.298463][ C1] ? kthread_blkcg+0xf0/0xf0 [ 121.303048][ C1] ret_from_fork+0x35/0x40 [ 121.309125][ C1] Kernel Offset: 0x19e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 121.320758][ C1] Rebooting in 86400 seconds..