[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 140.683586][ T32] kauditd_printk_skb: 4 callbacks suppressed [ 140.683631][ T32] audit: type=1800 audit(1583308471.725:39): pid=11776 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 140.726616][ T32] audit: type=1800 audit(1583308471.765:40): pid=11776 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 143.170679][ T32] audit: type=1400 audit(1583308474.215:41): avc: denied { map } for pid=11951 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.238' (ECDSA) to the list of known hosts. [ 152.122388][ T32] audit: type=1400 audit(1583308483.165:42): avc: denied { map } for pid=11963 comm="syz-executor990" path="/root/syz-executor990665677" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 152.165742][T11964] IPVS: ftp: loaded support on port[0] = 21 [ 152.291403][T11964] chnl_net:caif_netlink_parms(): no params data found [ 152.383131][T11964] bridge0: port 1(bridge_slave_0) entered blocking state [ 152.390824][T11964] bridge0: port 1(bridge_slave_0) entered disabled state [ 152.400209][T11964] device bridge_slave_0 entered promiscuous mode [ 152.411127][T11964] bridge0: port 2(bridge_slave_1) entered blocking state [ 152.418534][T11964] bridge0: port 2(bridge_slave_1) entered disabled state [ 152.427260][T11964] device bridge_slave_1 entered promiscuous mode [ 152.459274][T11964] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 152.474056][T11964] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 152.505641][T11964] team0: Port device team_slave_0 added [ 152.516976][T11964] team0: Port device team_slave_1 added [ 152.544392][T11964] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 152.551472][T11964] 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. [ 152.577551][T11964] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 152.591751][T11964] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 152.598919][T11964] 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. [ 152.624959][T11964] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 152.698234][T11964] device hsr_slave_0 entered promiscuous mode [ 152.745107][T11964] device hsr_slave_1 entered promiscuous mode [ 152.924970][ T32] audit: type=1400 audit(1583308483.975:43): avc: denied { create } for pid=11964 comm="syz-executor990" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 152.932306][T11964] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 152.950260][ T32] audit: type=1400 audit(1583308483.975:44): avc: denied { write } for pid=11964 comm="syz-executor990" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 152.950367][ T32] audit: type=1400 audit(1583308483.975:45): avc: denied { read } for pid=11964 comm="syz-executor990" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 153.040654][T11964] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 153.100123][T11964] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 153.160060][T11964] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 153.258257][T11964] bridge0: port 2(bridge_slave_1) entered blocking state [ 153.265787][T11964] bridge0: port 2(bridge_slave_1) entered forwarding state [ 153.274694][T11964] bridge0: port 1(bridge_slave_0) entered blocking state [ 153.282490][T11964] bridge0: port 1(bridge_slave_0) entered forwarding state [ 153.305915][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 153.317436][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 153.415757][T11964] 8021q: adding VLAN 0 to HW filter on device bond0 [ 153.441590][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 153.451571][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 153.470456][T11964] 8021q: adding VLAN 0 to HW filter on device team0 [ 153.487660][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 153.497883][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 153.507328][ T4013] bridge0: port 1(bridge_slave_0) entered blocking state [ 153.514756][ T4013] bridge0: port 1(bridge_slave_0) entered forwarding state [ 153.532459][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 153.543076][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 153.552778][ T2667] bridge0: port 2(bridge_slave_1) entered blocking state [ 153.560274][ T2667] bridge0: port 2(bridge_slave_1) entered forwarding state [ 153.576768][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 153.597195][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 153.618084][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 153.628367][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 153.639621][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 153.654513][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 153.665083][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 153.694745][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 153.704875][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 153.715766][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 153.726094][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 153.742152][T11964] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 153.784940][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 153.792724][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 153.817283][T11964] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 153.862351][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 153.872570][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 153.914589][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 153.925530][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 153.938767][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 153.950541][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 153.964805][T11964] device veth0_vlan entered promiscuous mode [ 153.988801][T11964] device veth1_vlan entered promiscuous mode [ 154.040263][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 154.049587][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 154.059113][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 154.068702][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 154.088565][T11964] device veth0_macvtap entered promiscuous mode [ 154.106069][T11964] device veth1_macvtap entered promiscuous mode [ 154.142872][T11964] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 154.151139][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 154.161505][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 154.171100][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 154.180757][ T4013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 154.203361][T11964] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 154.211180][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 154.221391][ T2667] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 154.504574][ C0] ===================================================== [ 154.513252][ C0] BUG: KMSAN: use-after-free in find_match+0x317/0x1480 [ 154.520207][ C0] CPU: 0 PID: 2667 Comm: kworker/0:2 Not tainted 5.6.0-rc2-syzkaller #0 [ 154.528547][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 154.538765][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 154.544927][ C0] Call Trace: [ 154.548454][ C0] [ 154.551368][ C0] dump_stack+0x1c9/0x220 [ 154.555842][ C0] kmsan_report+0xf7/0x1e0 [ 154.560288][ C0] __msan_warning+0x58/0xa0 [ 154.564799][ C0] find_match+0x317/0x1480 [ 154.569221][ C0] ? kernel_text_address+0x281/0x320 [ 154.574543][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.580021][ C0] __find_rr_leaf+0x3f9/0x1160 [ 154.585931][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 154.591604][ C0] fib6_table_lookup+0x586/0x1420 [ 154.596779][ C0] ip6_pol_route+0x203/0x2960 [ 154.601927][ C0] ip6_pol_route_input+0x123/0x140 [ 154.607335][ C0] fib6_rule_lookup+0x38f/0xa10 [ 154.613276][ C0] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 154.619016][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.624347][ C0] ip6_route_input+0xb9d/0xcf0 [ 154.629359][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.635224][ C0] ip6_rcv_finish_core+0x1f9/0x470 [ 154.640366][ C0] ipv6_rcv+0x628/0x710 [ 154.644825][ C0] ? local_bh_enable+0x40/0x40 [ 154.650801][ C0] process_backlog+0xa41/0x1410 [ 154.655676][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 154.660811][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.666482][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 154.672207][ C0] net_rx_action+0x786/0x1aa0 [ 154.677098][ C0] ? net_tx_action+0xc30/0xc30 [ 154.682287][ C0] __do_softirq+0x311/0x83d [ 154.686995][ C0] do_softirq_own_stack+0x49/0x80 [ 154.692011][ C0] [ 154.695191][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 154.700405][ C0] local_bh_enable+0x36/0x40 [ 154.705296][ C0] ip6_finish_output2+0x2113/0x2640 [ 154.711260][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.716720][ C0] __ip6_finish_output+0x824/0x8e0 [ 154.722689][ C0] ip6_finish_output+0x166/0x410 [ 154.727678][ C0] ip6_output+0x60a/0x770 [ 154.732211][ C0] ? ip6_output+0x770/0x770 [ 154.736816][ C0] ? ac6_seq_show+0x200/0x200 [ 154.741505][ C0] ndisc_send_skb+0x1047/0x15a0 [ 154.746572][ C0] ? ndisc_error_report+0x1a0/0x1a0 [ 154.751995][ C0] ndisc_send_ns+0xe38/0xe80 [ 154.756911][ C0] ? __queue_delayed_work+0x27f/0x450 [ 154.762381][ C0] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 154.768308][ C0] addrconf_dad_work+0xc0b/0x2aa0 [ 154.773908][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.779515][ C0] ? ipv6_get_saddr_eval+0x1350/0x1350 [ 154.785218][ C0] process_one_work+0x1555/0x1f40 [ 154.790536][ C0] worker_thread+0xef6/0x2450 [ 154.795561][ C0] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 154.801698][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 154.807126][ C0] kthread+0x4b5/0x4f0 [ 154.811331][ C0] ? process_one_work+0x1f40/0x1f40 [ 154.817084][ C0] ? kthread_blkcg+0xf0/0xf0 [ 154.821820][ C0] ret_from_fork+0x35/0x40 [ 154.826381][ C0] [ 154.828891][ C0] Uninit was created at: [ 154.834247][ C0] kmsan_internal_poison_shadow+0x66/0xd0 [ 154.840333][ C0] kmsan_slab_free+0x6e/0xb0 [ 154.844942][ C0] kfree+0x565/0x30a0 [ 154.848933][ C0] netdev_name_node_alt_destroy+0x587/0x690 [ 154.854948][ C0] rtnl_linkprop+0x939/0xc00 [ 154.859740][ C0] rtnl_dellinkprop+0x9d/0xb0 [ 154.864859][ C0] rtnetlink_rcv_msg+0x1153/0x1570 [ 154.871338][ C0] netlink_rcv_skb+0x451/0x650 [ 154.876601][ C0] rtnetlink_rcv+0x50/0x60 [ 154.881217][ C0] netlink_unicast+0xf9e/0x1100 [ 154.886353][ C0] netlink_sendmsg+0x1246/0x14d0 [ 154.891954][ C0] ____sys_sendmsg+0x12b6/0x1350 [ 154.897260][ C0] __sys_sendmsg+0x451/0x5f0 [ 154.902442][ C0] __ia32_compat_sys_sendmsg+0xed/0x130 [ 154.908219][ C0] do_fast_syscall_32+0x3c7/0x6e0 [ 154.913546][ C0] entry_SYSENTER_compat+0x68/0x77 [ 154.918865][ C0] ===================================================== [ 154.926332][ C0] Disabling lock debugging due to kernel taint [ 154.933065][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 154.940833][ C0] CPU: 0 PID: 2667 Comm: kworker/0:2 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 154.950967][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 154.962539][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 154.969095][ C0] Call Trace: [ 154.972570][ C0] [ 154.975426][ C0] dump_stack+0x1c9/0x220 [ 154.979776][ C0] panic+0x3d5/0xc3e [ 154.983735][ C0] kmsan_report+0x1df/0x1e0 [ 154.988264][ C0] __msan_warning+0x58/0xa0 [ 154.992787][ C0] find_match+0x317/0x1480 [ 154.997212][ C0] ? kernel_text_address+0x281/0x320 [ 155.002498][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.007736][ C0] __find_rr_leaf+0x3f9/0x1160 [ 155.012532][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 155.018758][ C0] fib6_table_lookup+0x586/0x1420 [ 155.027993][ C0] ip6_pol_route+0x203/0x2960 [ 155.033861][ C0] ip6_pol_route_input+0x123/0x140 [ 155.039266][ C0] fib6_rule_lookup+0x38f/0xa10 [ 155.044146][ C0] ? ip6_route_input_lookup+0x1f0/0x1f0 [ 155.049738][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.054946][ C0] ip6_route_input+0xb9d/0xcf0 [ 155.059836][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.065620][ C0] ip6_rcv_finish_core+0x1f9/0x470 [ 155.071227][ C0] ipv6_rcv+0x628/0x710 [ 155.076026][ C0] ? local_bh_enable+0x40/0x40 [ 155.080830][ C0] process_backlog+0xa41/0x1410 [ 155.085811][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 155.090947][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.096161][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 155.102751][ C0] net_rx_action+0x786/0x1aa0 [ 155.107464][ C0] ? net_tx_action+0xc30/0xc30 [ 155.112259][ C0] __do_softirq+0x311/0x83d [ 155.116800][ C0] do_softirq_own_stack+0x49/0x80 [ 155.121922][ C0] [ 155.124879][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 155.130218][ C0] local_bh_enable+0x36/0x40 [ 155.134821][ C0] ip6_finish_output2+0x2113/0x2640 [ 155.140068][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.145464][ C0] __ip6_finish_output+0x824/0x8e0 [ 155.150603][ C0] ip6_finish_output+0x166/0x410 [ 155.155552][ C0] ip6_output+0x60a/0x770 [ 155.160467][ C0] ? ip6_output+0x770/0x770 [ 155.164983][ C0] ? ac6_seq_show+0x200/0x200 [ 155.169953][ C0] ndisc_send_skb+0x1047/0x15a0 [ 155.174845][ C0] ? ndisc_error_report+0x1a0/0x1a0 [ 155.180062][ C0] ndisc_send_ns+0xe38/0xe80 [ 155.184680][ C0] ? __queue_delayed_work+0x27f/0x450 [ 155.190350][ C0] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 155.196437][ C0] addrconf_dad_work+0xc0b/0x2aa0 [ 155.201480][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.206894][ C0] ? ipv6_get_saddr_eval+0x1350/0x1350 [ 155.212486][ C0] process_one_work+0x1555/0x1f40 [ 155.218066][ C0] worker_thread+0xef6/0x2450 [ 155.223212][ C0] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 155.229268][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 155.234490][ C0] kthread+0x4b5/0x4f0 [ 155.238606][ C0] ? process_one_work+0x1f40/0x1f40 [ 155.244232][ C0] ? kthread_blkcg+0xf0/0xf0 [ 155.252587][ C0] ret_from_fork+0x35/0x40 [ 155.258667][ C0] Kernel Offset: 0xbe00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 155.271506][ C0] Rebooting in 86400 seconds..