[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 102.568756][ T32] audit: type=1800 audit(1584334712.614:25): pid=10870 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 102.614995][ T32] audit: type=1800 audit(1584334712.634:26): pid=10870 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 102.635966][ T32] audit: type=1800 audit(1584334712.644:27): pid=10870 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 syzkaller login: [ 108.554797][T11008] bash (11008) used greatest stack depth: 3904 bytes left Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts. [ 116.749809][T11021] IPVS: ftp: loaded support on port[0] = 21 [ 116.838529][T11021] chnl_net:caif_netlink_parms(): no params data found [ 116.915743][T11021] bridge0: port 1(bridge_slave_0) entered blocking state [ 116.925674][T11021] bridge0: port 1(bridge_slave_0) entered disabled state [ 116.938255][T11021] device bridge_slave_0 entered promiscuous mode [ 116.948069][T11021] bridge0: port 2(bridge_slave_1) entered blocking state [ 116.955819][T11021] bridge0: port 2(bridge_slave_1) entered disabled state [ 116.965120][T11021] device bridge_slave_1 entered promiscuous mode [ 116.991406][T11021] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 117.004201][T11021] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 117.031882][T11021] team0: Port device team_slave_0 added [ 117.040573][T11021] team0: Port device team_slave_1 added [ 117.063050][T11021] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 117.070212][T11021] 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. [ 117.100002][T11021] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 117.114632][T11021] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 117.122935][T11021] 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. [ 117.150935][T11021] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 117.217596][T11021] device hsr_slave_0 entered promiscuous mode [ 117.264576][T11021] device hsr_slave_1 entered promiscuous mode [ 117.414591][T11021] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 117.468763][T11021] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 117.528626][T11021] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 117.588405][T11021] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 117.670345][T11021] bridge0: port 2(bridge_slave_1) entered blocking state [ 117.679694][T11021] bridge0: port 2(bridge_slave_1) entered forwarding state [ 117.688042][T11021] bridge0: port 1(bridge_slave_0) entered blocking state [ 117.695362][T11021] bridge0: port 1(bridge_slave_0) entered forwarding state [ 117.758229][T11021] 8021q: adding VLAN 0 to HW filter on device bond0 [ 117.775307][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 117.786273][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 117.796307][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 117.809677][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 117.826489][T11021] 8021q: adding VLAN 0 to HW filter on device team0 [ 117.840070][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 117.850555][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 117.859840][ T30] bridge0: port 1(bridge_slave_0) entered blocking state [ 117.867013][ T30] bridge0: port 1(bridge_slave_0) entered forwarding state [ 117.880738][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 117.890423][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 117.899738][ T4125] bridge0: port 2(bridge_slave_1) entered blocking state [ 117.907369][ T4125] bridge0: port 2(bridge_slave_1) entered forwarding state [ 117.922060][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 117.944268][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 117.954565][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 117.965406][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 117.975704][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 117.985741][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 118.002398][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 118.011165][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 118.020517][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 118.035365][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 118.045242][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 118.061026][T11021] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 118.085047][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 118.093053][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 118.108791][T11021] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 118.132540][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 118.142669][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 118.169206][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 118.179285][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 118.191919][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 118.201113][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 118.214316][T11021] device veth0_vlan entered promiscuous mode [ 118.230314][T11021] device veth1_vlan entered promiscuous mode [ 118.259875][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 118.269363][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 118.278436][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 118.287815][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 118.301012][T11021] device veth0_macvtap entered promiscuous mode [ 118.313089][T11021] device veth1_macvtap entered promiscuous mode [ 118.338308][T11021] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 118.346995][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 118.356365][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 118.365592][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 118.375353][ T4125] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 118.390936][T11021] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 118.399952][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 118.409503][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 118.634578][ C0] ===================================================== [ 118.642004][ C0] BUG: KMSAN: use-after-free in find_match+0x317/0x1480 [ 118.649024][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.6.0-rc2-syzkaller #0 [ 118.657179][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.667227][ C0] Call Trace: [ 118.670514][ C0] dump_stack+0x1c9/0x220 [ 118.674831][ C0] kmsan_report+0xf7/0x1e0 [ 118.679311][ C0] __msan_warning+0x58/0xa0 [ 118.683861][ C0] find_match+0x317/0x1480 [ 118.688416][ C0] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 118.694990][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 118.700211][ C0] __find_rr_leaf+0x3f9/0x1160 [ 118.704973][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 118.710072][ C0] fib6_table_lookup+0x586/0x1420 [ 118.715103][ C0] ip6_pol_route+0x203/0x2960 [ 118.719769][ C0] ? nf_ip6_checksum+0x501/0x610 [ 118.724696][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 118.729901][ C0] ip6_pol_route_input+0x123/0x140 [ 118.735004][ C0] fib6_rule_lookup+0x38f/0xa10 [ 118.739926][ C0] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 118.745462][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 118.750645][ C0] ip6_route_input+0xb9d/0xcf0 [ 118.755418][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 118.760609][ C0] ip6_rcv_finish_core+0x1f9/0x470 [ 118.765718][ C0] ipv6_rcv+0x628/0x710 [ 118.769863][ C0] ? local_bh_enable+0x40/0x40 [ 118.774618][ C0] process_backlog+0xa41/0x1410 [ 118.779460][ C0] ? __list_add_valid+0xb8/0x420 [ 118.784389][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 118.789503][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 118.794715][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 118.800029][ C0] net_rx_action+0x786/0x1aa0 [ 118.804721][ C0] ? net_tx_action+0xc30/0xc30 [ 118.809483][ C0] __do_softirq+0x311/0x83d [ 118.814036][ C0] ? ksoftirqd_should_run+0x30/0x30 [ 118.819219][ C0] ? takeover_tasklets+0x8f0/0x8f0 [ 118.824318][ C0] run_ksoftirqd+0x25/0x40 [ 118.830422][ C0] smpboot_thread_fn+0x493/0x980 [ 118.835358][ C0] kthread+0x4b5/0x4f0 [ 118.839578][ C0] ? cpu_report_death+0x180/0x180 [ 118.844612][ C0] ? kthread_blkcg+0xf0/0xf0 [ 118.849191][ C0] ret_from_fork+0x35/0x40 [ 118.853594][ C0] [ 118.855903][ C0] Uninit was created at: [ 118.860171][ C0] kmsan_internal_poison_shadow+0x66/0xd0 [ 118.865922][ C0] kmsan_slab_free+0x6e/0xb0 [ 118.870518][ C0] kfree+0x565/0x30a0 [ 118.874494][ C0] netdev_name_node_alt_destroy+0x587/0x690 [ 118.880371][ C0] rtnl_linkprop+0x939/0xc00 [ 118.885000][ C0] rtnl_dellinkprop+0x9d/0xb0 [ 118.889671][ C0] rtnetlink_rcv_msg+0x1153/0x1570 [ 118.894763][ C0] netlink_rcv_skb+0x451/0x650 [ 118.899769][ C0] rtnetlink_rcv+0x50/0x60 [ 118.904181][ C0] netlink_unicast+0xf9e/0x1100 [ 118.909014][ C0] netlink_sendmsg+0x1246/0x14d0 [ 118.913936][ C0] ____sys_sendmsg+0x12b6/0x1350 [ 118.918854][ C0] __sys_sendmsg+0x451/0x5f0 [ 118.923514][ C0] __se_sys_sendmsg+0x97/0xb0 [ 118.928172][ C0] __x64_sys_sendmsg+0x4a/0x70 [ 118.932935][ C0] do_syscall_64+0xb8/0x160 [ 118.937429][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.943408][ C0] ===================================================== [ 118.950851][ C0] Disabling lock debugging due to kernel taint [ 118.956984][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 118.963659][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 118.973089][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.983146][ C0] Call Trace: [ 118.986434][ C0] dump_stack+0x1c9/0x220 [ 118.990749][ C0] panic+0x3d5/0xc3e [ 118.994750][ C0] kmsan_report+0x1df/0x1e0 [ 118.999254][ C0] __msan_warning+0x58/0xa0 [ 119.003752][ C0] find_match+0x317/0x1480 [ 119.008177][ C0] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 119.014316][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 119.019508][ C0] __find_rr_leaf+0x3f9/0x1160 [ 119.024277][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 119.029380][ C0] fib6_table_lookup+0x586/0x1420 [ 119.034417][ C0] ip6_pol_route+0x203/0x2960 [ 119.039080][ C0] ? nf_ip6_checksum+0x501/0x610 [ 119.044003][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 119.049211][ C0] ip6_pol_route_input+0x123/0x140 [ 119.054315][ C0] fib6_rule_lookup+0x38f/0xa10 [ 119.059152][ C0] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 119.064733][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 119.069921][ C0] ip6_route_input+0xb9d/0xcf0 [ 119.075828][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 119.081034][ C0] ip6_rcv_finish_core+0x1f9/0x470 [ 119.086134][ C0] ipv6_rcv+0x628/0x710 [ 119.090277][ C0] ? local_bh_enable+0x40/0x40 [ 119.095030][ C0] process_backlog+0xa41/0x1410 [ 119.099869][ C0] ? __list_add_valid+0xb8/0x420 [ 119.104795][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 119.109891][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 119.115164][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 119.120476][ C0] net_rx_action+0x786/0x1aa0 [ 119.125176][ C0] ? net_tx_action+0xc30/0xc30 [ 119.130044][ C0] __do_softirq+0x311/0x83d [ 119.134716][ C0] ? ksoftirqd_should_run+0x30/0x30 [ 119.140206][ C0] ? takeover_tasklets+0x8f0/0x8f0 [ 119.145322][ C0] run_ksoftirqd+0x25/0x40 [ 119.149722][ C0] smpboot_thread_fn+0x493/0x980 [ 119.154756][ C0] kthread+0x4b5/0x4f0 [ 119.158809][ C0] ? cpu_report_death+0x180/0x180 [ 119.163923][ C0] ? kthread_blkcg+0xf0/0xf0 [ 119.168526][ C0] ret_from_fork+0x35/0x40 [ 119.174339][ C0] Kernel Offset: 0x7a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 119.185886][ C0] Rebooting in 86400 seconds..