[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 95.822091][ T32] audit: type=1800 audit(1580407698.874:25): pid=10840 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 95.854463][ T32] audit: type=1800 audit(1580407698.904:26): pid=10840 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 95.901483][ T32] audit: type=1800 audit(1580407698.934:27): pid=10840 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 '10.128.0.242' (ECDSA) to the list of known hosts. syzkaller login: [ 106.807903][T10993] IPVS: ftp: loaded support on port[0] = 21 [ 106.897267][T10993] chnl_net:caif_netlink_parms(): no params data found [ 106.943661][T10993] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.951048][T10993] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.959647][T10993] device bridge_slave_0 entered promiscuous mode [ 106.968803][T10993] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.976236][T10993] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.984724][T10993] device bridge_slave_1 entered promiscuous mode [ 107.011061][T10993] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 107.022953][T10993] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 107.049966][T10993] team0: Port device team_slave_0 added [ 107.058169][T10993] team0: Port device team_slave_1 added [ 107.080774][T10993] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 107.088251][T10993] 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. [ 107.114490][T10993] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 107.126544][T10993] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 107.133558][T10993] 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. [ 107.159691][T10993] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 107.227796][T10993] device hsr_slave_0 entered promiscuous mode [ 107.264918][T10993] device hsr_slave_1 entered promiscuous mode [ 107.411469][T10993] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 107.468394][T10993] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 107.528408][T10993] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 107.588294][T10993] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 107.659614][T10993] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.666972][T10993] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.674839][T10993] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.682109][T10993] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.740157][T10993] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.757157][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 107.768029][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 107.777678][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 107.789009][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 107.804983][T10993] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.819122][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 107.828061][ T30] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.835356][ T30] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.849526][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 107.858933][T10995] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.867326][T10995] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.892052][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 107.915722][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 107.926288][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 107.935947][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 107.946148][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 107.956101][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 107.965332][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.975897][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 107.992196][T10993] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 108.005157][T10993] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 108.014074][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 108.024769][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 108.050040][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 108.058427][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 108.073603][T10993] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 108.100965][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 108.110705][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 108.136151][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 108.146943][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 108.158116][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 108.167284][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 108.180741][T10993] device veth0_vlan entered promiscuous mode [ 108.195947][T10993] device veth1_vlan entered promiscuous mode [ 108.222740][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 108.232412][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 108.241480][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 108.250657][T10995] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 108.264922][T10993] device veth0_macvtap entered promiscuous mode [ 108.278936][T10993] device veth1_macvtap entered promiscuous mode [ 108.303429][T10993] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 108.311610][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 108.320744][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready executing program [ 108.330537][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 108.340124][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 108.354706][T10993] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 108.362280][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 108.372021][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 108.439039][T10998] device veth0_to_hsr entered promiscuous mode [ 108.505323][T10998] device batadv0 entered promiscuous mode executing program [ 108.630038][T10999] veth0_to_hsr: This device is already a HSR slave. executing program [ 108.779029][T11000] veth0_to_hsr: This device is already a HSR slave. executing program [ 108.908180][T11001] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.059121][T11002] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.198775][T11003] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.328709][T11004] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.478867][T11005] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.619105][T11006] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.778774][T11007] veth0_to_hsr: This device is already a HSR slave. executing program [ 109.918963][T11008] veth0_to_hsr: This device is already a HSR slave. executing program [ 110.068303][T11009] veth0_to_hsr: This device is already a HSR slave. executing program [ 110.198321][T11010] veth0_to_hsr: This device is already a HSR slave. executing program [ 110.338940][T11011] veth0_to_hsr: This device is already a HSR slave. executing program [ 110.485573][ C0] ===================================================== [ 110.492744][ C0] BUG: KMSAN: uninit-value in batadv_bla_tx+0x2675/0x3730 [ 110.499907][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.5.0-rc5-syzkaller #0 [ 110.507965][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.518098][ C0] Call Trace: [ 110.521498][ C0] dump_stack+0x1c9/0x220 [ 110.525828][ C0] kmsan_report+0xf7/0x1e0 [ 110.530258][ C0] __msan_warning+0x58/0xa0 [ 110.534849][ C0] batadv_bla_tx+0x2675/0x3730 [ 110.539661][ C0] ? arch_stack_walk+0x34c/0x3e0 [ 110.544641][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.549881][ C0] batadv_interface_tx+0x67c/0x2450 [ 110.555248][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 110.562090][ C0] ? batadv_softif_is_valid+0xb0/0xb0 [ 110.567579][ C0] dev_hard_start_xmit+0x531/0xab0 [ 110.572776][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.577978][ C0] __dev_queue_xmit+0x37de/0x4220 [ 110.583073][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.588304][ C0] ? skb_clone+0x404/0x5d0 [ 110.592750][ C0] dev_queue_xmit+0x4b/0x60 [ 110.597253][ C0] hsr_forward_skb+0x2614/0x30d0 [ 110.602223][ C0] ? __msan_poison_alloca+0xf0/0x120 [ 110.607523][ C0] hsr_handle_frame+0x385/0x4b0 [ 110.612380][ C0] ? hsr_port_exists+0x90/0x90 [ 110.617191][ C0] __netif_receive_skb_core+0x21de/0x5840 [ 110.622915][ C0] ? __msan_poison_alloca+0xf0/0x120 [ 110.628187][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 110.633297][ C0] process_backlog+0x936/0x1410 [ 110.638156][ C0] ? __list_add_valid+0xb8/0x420 [ 110.643095][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 110.648211][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.653401][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 110.658848][ C0] net_rx_action+0x786/0x1ab0 [ 110.663570][ C0] ? net_tx_action+0xc30/0xc30 [ 110.668332][ C0] __do_softirq+0x311/0x83d [ 110.672851][ C0] ? ksoftirqd_should_run+0x30/0x30 [ 110.678146][ C0] ? takeover_tasklets+0x8f0/0x8f0 [ 110.683386][ C0] run_ksoftirqd+0x25/0x40 [ 110.687794][ C0] smpboot_thread_fn+0x493/0x980 [ 110.692815][ C0] kthread+0x4b5/0x4f0 [ 110.696937][ C0] ? cpu_report_death+0x180/0x180 [ 110.701964][ C0] ? kthread_blkcg+0xf0/0xf0 [ 110.706549][ C0] ret_from_fork+0x35/0x40 [ 110.711047][ C0] [ 110.713415][ C0] Uninit was stored to memory at: [ 110.718437][ C0] kmsan_internal_chain_origin+0xad/0x130 [ 110.724261][ C0] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 110.730256][ C0] kmsan_memcpy_metadata+0xb/0x10 [ 110.735263][ C0] __msan_memcpy+0x43/0x50 [ 110.739661][ C0] pskb_expand_head+0x38b/0x1b00 [ 110.744597][ C0] __skb_pad+0x47f/0x900 [ 110.749015][ C0] send_hsr_supervision_frame+0x122d/0x1500 [ 110.754900][ C0] hsr_announce+0x1e2/0x370 [ 110.759385][ C0] call_timer_fn+0x218/0x510 [ 110.764050][ C0] __run_timers+0xcff/0x1210 [ 110.768632][ C0] run_timer_softirq+0x2d/0x50 [ 110.773386][ C0] __do_softirq+0x311/0x83d [ 110.777873][ C0] [ 110.780202][ C0] Uninit was created at: [ 110.784452][ C0] kmsan_save_stack_with_flags+0x3c/0x90 [ 110.790103][ C0] kmsan_alloc_page+0x12a/0x310 [ 110.794987][ C0] __alloc_pages_nodemask+0x57f2/0x5f60 [ 110.800527][ C0] page_frag_alloc+0x3ae/0x910 [ 110.805290][ C0] __napi_alloc_skb+0x193/0xa60 [ 110.810137][ C0] page_to_skb+0x19f/0x1100 [ 110.814747][ C0] receive_buf+0xe57/0x8ac0 [ 110.819310][ C0] virtnet_poll+0x64b/0x19f0 [ 110.823895][ C0] net_rx_action+0x786/0x1ab0 [ 110.828719][ C0] __do_softirq+0x311/0x83d [ 110.833202][ C0] ===================================================== [ 110.840118][ C0] Disabling lock debugging due to kernel taint [ 110.846318][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 110.852987][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 110.862446][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.872947][ C0] Call Trace: [ 110.876242][ C0] dump_stack+0x1c9/0x220 [ 110.880614][ C0] panic+0x3d5/0xc3e [ 110.885200][ C0] kmsan_report+0x1df/0x1e0 [ 110.889811][ C0] __msan_warning+0x58/0xa0 [ 110.894326][ C0] batadv_bla_tx+0x2675/0x3730 [ 110.899181][ C0] ? arch_stack_walk+0x34c/0x3e0 [ 110.904253][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.909463][ C0] batadv_interface_tx+0x67c/0x2450 [ 110.914676][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 110.920853][ C0] ? batadv_softif_is_valid+0xb0/0xb0 [ 110.926217][ C0] dev_hard_start_xmit+0x531/0xab0 [ 110.931329][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.936540][ C0] __dev_queue_xmit+0x37de/0x4220 [ 110.941584][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 110.946787][ C0] ? skb_clone+0x404/0x5d0 [ 110.951247][ C0] dev_queue_xmit+0x4b/0x60 [ 110.955844][ C0] hsr_forward_skb+0x2614/0x30d0 [ 110.960777][ C0] ? __msan_poison_alloca+0xf0/0x120 [ 110.966288][ C0] hsr_handle_frame+0x385/0x4b0 [ 110.971160][ C0] ? hsr_port_exists+0x90/0x90 [ 110.975922][ C0] __netif_receive_skb_core+0x21de/0x5840 [ 110.981648][ C0] ? __msan_poison_alloca+0xf0/0x120 [ 110.986921][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 110.992020][ C0] process_backlog+0x936/0x1410 [ 110.996876][ C0] ? __list_add_valid+0xb8/0x420 [ 111.001815][ C0] ? kmsan_get_metadata+0x4f/0x180 [ 111.006924][ C0] ? kmsan_get_metadata+0x11d/0x180 [ 111.012288][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 111.017695][ C0] net_rx_action+0x786/0x1ab0 [ 111.022414][ C0] ? net_tx_action+0xc30/0xc30 [ 111.027191][ C0] __do_softirq+0x311/0x83d [ 111.031713][ C0] ? ksoftirqd_should_run+0x30/0x30 [ 111.036905][ C0] ? takeover_tasklets+0x8f0/0x8f0 [ 111.042012][ C0] run_ksoftirqd+0x25/0x40 [ 111.046573][ C0] smpboot_thread_fn+0x493/0x980 [ 111.051505][ C0] kthread+0x4b5/0x4f0 [ 111.055609][ C0] ? cpu_report_death+0x180/0x180 [ 111.060671][ C0] ? kthread_blkcg+0xf0/0xf0 [ 111.065261][ C0] ret_from_fork+0x35/0x40 [ 111.071026][ C0] Kernel Offset: 0x29a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 111.082673][ C0] Rebooting in 86400 seconds..