[ OK ] Started OpenBSD Secure Shell server. [ 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 '10.128.0.217' (ECDSA) to the list of known hosts. syzkaller login: [ 113.620516][ T8463] IPVS: ftp: loaded support on port[0] = 21 [ 113.768205][ T8463] chnl_net:caif_netlink_parms(): no params data found [ 114.044387][ T8463] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.051798][ T8463] bridge0: port 1(bridge_slave_0) entered disabled state [ 114.061063][ T8463] device bridge_slave_0 entered promiscuous mode [ 114.071376][ T8463] bridge0: port 2(bridge_slave_1) entered blocking state [ 114.078867][ T8463] bridge0: port 2(bridge_slave_1) entered disabled state [ 114.088187][ T8463] device bridge_slave_1 entered promiscuous mode [ 114.119659][ T8463] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 114.131758][ T8463] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 114.168662][ T8463] team0: Port device team_slave_0 added [ 114.177036][ T8463] team0: Port device team_slave_1 added [ 114.208670][ T8463] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 114.215951][ T8463] 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. [ 114.242204][ T8463] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 114.256074][ T8463] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 114.263373][ T8463] 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. [ 114.290307][ T8463] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 114.357076][ T8463] device hsr_slave_0 entered promiscuous mode [ 114.412730][ T8463] device hsr_slave_1 entered promiscuous mode [ 114.626362][ T8463] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 114.666874][ T8463] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 114.716608][ T8463] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 114.781570][ T8463] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 114.906325][ T8463] 8021q: adding VLAN 0 to HW filter on device bond0 [ 114.924877][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 114.934274][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 114.947182][ T8463] 8021q: adding VLAN 0 to HW filter on device team0 [ 114.963940][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 114.976404][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 114.985746][ T2310] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.993126][ T2310] bridge0: port 1(bridge_slave_0) entered forwarding state [ 115.002315][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 115.011463][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 115.020996][ T2310] bridge0: port 2(bridge_slave_1) entered blocking state [ 115.028341][ T2310] bridge0: port 2(bridge_slave_1) entered forwarding state [ 115.044170][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 115.053536][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 115.069211][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 115.086628][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 115.096985][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 115.123106][ T8463] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 115.133965][ T8463] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 115.148804][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 115.158457][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 115.168655][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 115.179212][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 115.188718][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 115.198883][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 115.208410][ T3610] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 115.225377][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 115.253633][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 115.261314][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 115.286087][ T8463] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 115.313552][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 115.324195][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 115.357699][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 115.366654][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 115.382359][ T8463] device veth0_vlan entered promiscuous mode [ 115.394672][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 115.404190][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 115.421511][ T8463] device veth1_vlan entered promiscuous mode [ 115.455528][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 115.464305][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 115.473295][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 115.483107][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 115.504448][ T8463] device veth0_macvtap entered promiscuous mode [ 115.516888][ T8463] device veth1_macvtap entered promiscuous mode [ 115.542582][ T8463] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 115.551133][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 115.560890][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 115.570141][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 115.579962][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 115.598506][ T8463] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 115.613714][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 115.623904][ T2310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 115.862986][ T8682] ===================================================== [ 115.870070][ T8682] BUG: KMSAN: uninit-value in kmsan_check_memory+0xd/0x10 [ 115.877336][ T8682] CPU: 0 PID: 8682 Comm: syz-executor281 Not tainted 5.8.0-rc5-syzkaller #0 [ 115.886125][ T8682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 115.896188][ T8682] Call Trace: [ 115.899474][ T8682] dump_stack+0x1df/0x240 [ 115.903790][ T8682] kmsan_report+0xf7/0x1e0 [ 115.908308][ T8682] kmsan_internal_check_memory+0x238/0x3d0 [ 115.915157][ T8682] kmsan_check_memory+0xd/0x10 [ 115.920002][ T8682] _copy_to_iter+0x3d4/0x26e0 [ 115.924973][ T8682] bcm_recvmsg+0x25a/0x740 [ 115.929397][ T8682] ? bcm_sendmsg+0x8cf0/0x8cf0 [ 115.934930][ T8682] ? inet_sendpage+0x2c0/0x2c0 [ 115.939793][ T8682] __sys_recvfrom+0xacd/0xae0 [ 115.944464][ T8682] ? __fpregs_load_activate+0x38c/0x3c0 [ 115.949989][ T8682] ? kmsan_get_metadata+0x11d/0x180 [ 115.955289][ T8682] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 115.961076][ T8682] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 115.967209][ T8682] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 115.973082][ T8682] __se_sys_recvfrom+0x111/0x130 [ 115.978007][ T8682] __x64_sys_recvfrom+0x6e/0x90 [ 115.982867][ T8682] do_syscall_64+0xb0/0x150 [ 115.987377][ T8682] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 115.993811][ T8682] RIP: 0033:0x448cd9 [ 115.997694][ T8682] Code: Bad RIP value. [ 116.001820][ T8682] RSP: 002b:00007f5fbb95fd88 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 116.010214][ T8682] RAX: ffffffffffffffda RBX: 00000000006dec68 RCX: 0000000000448cd9 [ 116.018221][ T8682] RDX: 0000000000000032 RSI: 0000000020000040 RDI: 0000000000000003 [ 116.026178][ T8682] RBP: 00000000006dec60 R08: 0000000000000000 R09: 0000000000000000 [ 116.034165][ T8682] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec6c [ 116.042165][ T8682] R13: ffffff7f00000001 R14: 0000000000000000 R15: 000000306e616376 [ 116.050130][ T8682] [ 116.052528][ T8682] Uninit was stored to memory at: [ 116.057535][ T8682] kmsan_internal_chain_origin+0xad/0x130 [ 116.063232][ T8682] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 116.069191][ T8682] kmsan_memcpy_metadata+0xb/0x10 [ 116.074192][ T8682] __msan_memcpy+0x43/0x50 [ 116.078582][ T8682] bcm_send_to_user+0x250/0x820 [ 116.083410][ T8682] bcm_tx_timeout_handler+0x5d0/0x620 [ 116.088758][ T8682] __hrtimer_run_queues+0xa61/0x1340 [ 116.094026][ T8682] hrtimer_run_softirq+0x1b2/0x2b0 [ 116.099112][ T8682] __do_softirq+0x311/0x83d [ 116.103716][ T8682] [ 116.106025][ T8682] Local variable ----msg_head@bcm_tx_timeout_handler created at: [ 116.113718][ T8682] bcm_tx_timeout_handler+0x4f/0x620 [ 116.119052][ T8682] bcm_tx_timeout_handler+0x4f/0x620 [ 116.124304][ T8682] [ 116.126655][ T8682] Bytes 12-15 of 50 are uninitialized [ 116.132171][ T8682] Memory access of size 50 starts at ffff88b629809600 [ 116.138924][ T8682] ===================================================== [ 116.145851][ T8682] Disabling lock debugging due to kernel taint [ 116.152241][ T8682] Kernel panic - not syncing: panic_on_warn set ... [ 116.158817][ T8682] CPU: 0 PID: 8682 Comm: syz-executor281 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 116.168945][ T8682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.179236][ T8682] Call Trace: [ 116.182534][ T8682] dump_stack+0x1df/0x240 [ 116.186846][ T8682] panic+0x3d5/0xc3e [ 116.190818][ T8682] kmsan_report+0x1df/0x1e0 [ 116.195474][ T8682] kmsan_internal_check_memory+0x238/0x3d0 [ 116.201280][ T8682] kmsan_check_memory+0xd/0x10 [ 116.206112][ T8682] _copy_to_iter+0x3d4/0x26e0 [ 116.210776][ T8682] bcm_recvmsg+0x25a/0x740 [ 116.215173][ T8682] ? bcm_sendmsg+0x8cf0/0x8cf0 [ 116.219915][ T8682] ? inet_sendpage+0x2c0/0x2c0 [ 116.224658][ T8682] __sys_recvfrom+0xacd/0xae0 [ 116.229321][ T8682] ? __fpregs_load_activate+0x38c/0x3c0 [ 116.234856][ T8682] ? kmsan_get_metadata+0x11d/0x180 [ 116.240040][ T8682] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 116.245900][ T8682] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 116.252131][ T8682] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 116.258008][ T8682] __se_sys_recvfrom+0x111/0x130 [ 116.262933][ T8682] __x64_sys_recvfrom+0x6e/0x90 [ 116.267767][ T8682] do_syscall_64+0xb0/0x150 [ 116.272342][ T8682] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 116.278233][ T8682] RIP: 0033:0x448cd9 [ 116.282316][ T8682] Code: Bad RIP value. [ 116.286357][ T8682] RSP: 002b:00007f5fbb95fd88 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 116.295322][ T8682] RAX: ffffffffffffffda RBX: 00000000006dec68 RCX: 0000000000448cd9 [ 116.303296][ T8682] RDX: 0000000000000032 RSI: 0000000020000040 RDI: 0000000000000003 [ 116.311244][ T8682] RBP: 00000000006dec60 R08: 0000000000000000 R09: 0000000000000000 [ 116.319193][ T8682] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec6c [ 116.327144][ T8682] R13: ffffff7f00000001 R14: 0000000000000000 R15: 000000306e616376 [ 116.336701][ T8682] Kernel Offset: 0x28a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 116.348571][ T8682] Rebooting in 86400 seconds..