[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.39' (ECDSA) to the list of known hosts. syzkaller login: [ 142.535789][ T8218] IPVS: ftp: loaded support on port[0] = 21 [ 142.693764][ T8218] chnl_net:caif_netlink_parms(): no params data found [ 142.785365][ T8218] bridge0: port 1(bridge_slave_0) entered blocking state [ 142.792619][ T8218] bridge0: port 1(bridge_slave_0) entered disabled state [ 142.804710][ T8218] device bridge_slave_0 entered promiscuous mode [ 142.816491][ T8218] bridge0: port 2(bridge_slave_1) entered blocking state [ 142.824380][ T8218] bridge0: port 2(bridge_slave_1) entered disabled state [ 142.833904][ T8218] device bridge_slave_1 entered promiscuous mode [ 142.919118][ T8218] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 142.935819][ T8218] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 142.981192][ T8218] team0: Port device team_slave_0 added [ 142.994043][ T8218] team0: Port device team_slave_1 added [ 143.032106][ T8218] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 143.039346][ T8218] 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. [ 143.066365][ T8218] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 143.080248][ T8218] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 143.087922][ T8218] 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. [ 143.114260][ T8218] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 143.159044][ T8218] device hsr_slave_0 entered promiscuous mode [ 143.166594][ T8218] device hsr_slave_1 entered promiscuous mode [ 143.346178][ T8218] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 143.359376][ T8218] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 143.379585][ T8218] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 143.396640][ T8218] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 143.489372][ T8218] bridge0: port 2(bridge_slave_1) entered blocking state [ 143.496586][ T8218] bridge0: port 2(bridge_slave_1) entered forwarding state [ 143.504745][ T8218] bridge0: port 1(bridge_slave_0) entered blocking state [ 143.511943][ T8218] bridge0: port 1(bridge_slave_0) entered forwarding state [ 143.588726][ T8218] 8021q: adding VLAN 0 to HW filter on device bond0 [ 143.610004][ T2078] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 143.620739][ T2078] bridge0: port 1(bridge_slave_0) entered disabled state [ 143.631307][ T2078] bridge0: port 2(bridge_slave_1) entered disabled state [ 143.641949][ T2078] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 143.663942][ T8218] 8021q: adding VLAN 0 to HW filter on device team0 [ 143.683516][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 143.694524][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 143.703898][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 143.711162][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 143.733430][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 143.744139][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 143.753334][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 143.760670][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 143.769775][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 143.786873][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 143.803472][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 143.814173][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 143.824693][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 143.843012][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 143.844860][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 143.877862][ T8218] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 143.888492][ T8218] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 143.904441][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 143.914273][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 143.924590][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 143.933962][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 143.944238][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 143.970820][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 143.978545][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 144.000075][ T8218] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 144.037321][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 144.047633][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 144.082527][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 144.091894][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 144.103084][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 144.111930][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 144.130060][ T8218] device veth0_vlan entered promiscuous mode [ 144.150163][ T8218] device veth1_vlan entered promiscuous mode [ 144.189160][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 144.198249][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 144.207530][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 144.216724][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 144.232742][ T8218] device veth0_macvtap entered promiscuous mode [ 144.247603][ T8218] device veth1_macvtap entered promiscuous mode [ 144.279061][ T8218] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 144.287329][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 144.296742][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 144.305674][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 144.318074][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 144.337265][ T8218] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 144.345242][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 144.356557][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 144.371842][ T8218] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 144.383622][ T8218] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 144.392489][ T8218] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 144.401506][ T8218] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 147.273242][ T8484] ===================================================== [ 147.280250][ T8484] BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x9c/0xb0 [ 147.287698][ T8484] CPU: 1 PID: 8484 Comm: syz-executor306 Not tainted 5.10.0-rc4-syzkaller #0 [ 147.296438][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.306520][ T8484] Call Trace: [ 147.309811][ T8484] dump_stack+0x21c/0x280 [ 147.314235][ T8484] kmsan_report+0xfb/0x1e0 [ 147.318636][ T8484] kmsan_internal_check_memory+0x202/0x520 [ 147.324459][ T8484] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 147.330546][ T8484] ? should_fail+0x72/0x9e0 [ 147.335038][ T8484] kmsan_copy_to_user+0x9c/0xb0 [ 147.339874][ T8484] _copy_to_iter+0x637/0x2ed0 [ 147.344629][ T8484] ? kmsan_get_metadata+0x116/0x180 [ 147.350607][ T8484] ? kmsan_internal_set_origin+0x85/0xc0 [ 147.356345][ T8484] simple_copy_to_iter+0xf6/0x150 [ 147.361890][ T8484] __skb_datagram_iter+0x2cb/0x1210 [ 147.367346][ T8484] ? skb_copy_datagram_iter+0x200/0x200 [ 147.373203][ T8484] skb_copy_datagram_iter+0xd8/0x200 [ 147.378840][ T8484] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 147.384656][ T8484] packet_recvmsg+0x764/0x2060 [ 147.389535][ T8484] ? packet_sendmsg+0x9a60/0x9a60 [ 147.394586][ T8484] ____sys_recvmsg+0x57f/0xd50 [ 147.401950][ T8484] ? import_iovec+0x223/0x240 [ 147.406620][ T8484] ? kmsan_get_metadata+0x116/0x180 [ 147.411843][ T8484] do_recvmmsg+0xaa7/0x22f0 [ 147.416337][ T8484] ? handle_mm_fault+0x3563/0x4c20 [ 147.421459][ T8484] ? __se_sys_recvmmsg+0xd6/0x410 [ 147.426749][ T8484] __se_sys_recvmmsg+0x24a/0x410 [ 147.431674][ T8484] __x64_sys_recvmmsg+0x62/0x80 [ 147.436526][ T8484] do_syscall_64+0x9f/0x140 [ 147.441027][ T8484] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.446926][ T8484] RIP: 0033:0x443789 [ 147.450904][ T8484] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 147.470512][ T8484] RSP: 002b:00007ffcf2b89a68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b [ 147.479269][ T8484] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443789 [ 147.487514][ T8484] RDX: 0000000000000001 RSI: 0000000020001500 RDI: 0000000000000003 [ 147.495756][ T8484] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000d [ 147.504093][ T8484] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf2b89a80 [ 147.513278][ T8484] R13: 00000000000f4240 R14: 0000000000023ea9 R15: 00007ffcf2b89a74 [ 147.521234][ T8484] [ 147.523676][ T8484] Uninit was stored to memory at: [ 147.528864][ T8484] kmsan_internal_chain_origin+0xad/0x130 [ 147.534648][ T8484] kmsan_memcpy_memmove_metadata+0x25e/0x2d0 [ 147.541083][ T8484] kmsan_memcpy_metadata+0xb/0x10 [ 147.546703][ T8484] __msan_memcpy+0x46/0x60 [ 147.551128][ T8484] pskb_expand_head+0x3d6/0x1e20 [ 147.556174][ T8484] batadv_skb_head_push+0x2cc/0x410 [ 147.561445][ T8484] batadv_send_skb_packet+0x1ed/0x970 [ 147.566817][ T8484] batadv_send_broadcast_skb+0x76/0x90 [ 147.572261][ T8484] batadv_iv_send_outstanding_bat_ogm_packet+0xb2d/0xef0 [ 147.579274][ T8484] process_one_work+0x1219/0x1fe0 [ 147.584280][ T8484] worker_thread+0x123c/0x2730 [ 147.589027][ T8484] kthread+0x51c/0x560 [ 147.593107][ T8484] ret_from_fork+0x1f/0x30 [ 147.597494][ T8484] [ 147.599814][ T8484] Uninit was created at: [ 147.604042][ T8484] kmsan_save_stack_with_flags+0x3c/0x90 [ 147.609652][ T8484] kmsan_alloc_page+0xd3/0x1f0 [ 147.614404][ T8484] __alloc_pages_nodemask+0x827/0xf90 [ 147.619756][ T8484] page_frag_alloc+0x357/0x890 [ 147.624637][ T8484] __napi_alloc_skb+0x1bf/0xaa0 [ 147.629572][ T8484] page_to_skb+0x142/0x1640 [ 147.634073][ T8484] receive_mergeable+0xef5/0x5bb0 [ 147.639091][ T8484] receive_buf+0x2dc/0x2bb0 [ 147.643596][ T8484] virtnet_poll+0xa51/0x1d10 [ 147.648180][ T8484] napi_poll+0x40a/0x1020 [ 147.652500][ T8484] net_rx_action+0x34c/0xd30 [ 147.657087][ T8484] __do_softirq+0x1a9/0x6fa [ 147.661605][ T8484] [ 147.663917][ T8484] Bytes 52-53 of 146 are uninitialized [ 147.669354][ T8484] Memory access of size 146 starts at ffff88812ecb1c40 [ 147.676185][ T8484] Data copied to user address 00000000200001c0 [ 147.682426][ T8484] ===================================================== [ 147.690263][ T8484] Disabling lock debugging due to kernel taint [ 147.696395][ T8484] Kernel panic - not syncing: panic_on_warn set ... [ 147.702985][ T8484] CPU: 1 PID: 8484 Comm: syz-executor306 Tainted: G B 5.10.0-rc4-syzkaller #0 [ 147.713380][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.723426][ T8484] Call Trace: [ 147.726723][ T8484] dump_stack+0x21c/0x280 [ 147.731070][ T8484] panic+0x4c6/0xea7 [ 147.734950][ T8484] ? add_taint+0x17c/0x210 [ 147.739350][ T8484] kmsan_report+0x1de/0x1e0 [ 147.743851][ T8484] kmsan_internal_check_memory+0x202/0x520 [ 147.749662][ T8484] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 147.755717][ T8484] ? should_fail+0x72/0x9e0 [ 147.760214][ T8484] kmsan_copy_to_user+0x9c/0xb0 [ 147.765428][ T8484] _copy_to_iter+0x637/0x2ed0 [ 147.770093][ T8484] ? kmsan_get_metadata+0x116/0x180 [ 147.775275][ T8484] ? kmsan_internal_set_origin+0x85/0xc0 [ 147.780898][ T8484] simple_copy_to_iter+0xf6/0x150 [ 147.785930][ T8484] __skb_datagram_iter+0x2cb/0x1210 [ 147.791884][ T8484] ? skb_copy_datagram_iter+0x200/0x200 [ 147.797606][ T8484] skb_copy_datagram_iter+0xd8/0x200 [ 147.802896][ T8484] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 147.808706][ T8484] packet_recvmsg+0x764/0x2060 [ 147.813474][ T8484] ? packet_sendmsg+0x9a60/0x9a60 [ 147.818482][ T8484] ____sys_recvmsg+0x57f/0xd50 [ 147.823254][ T8484] ? import_iovec+0x223/0x240 [ 147.827929][ T8484] ? kmsan_get_metadata+0x116/0x180 [ 147.833126][ T8484] do_recvmmsg+0xaa7/0x22f0 [ 147.837638][ T8484] ? handle_mm_fault+0x3563/0x4c20 [ 147.842759][ T8484] ? __se_sys_recvmmsg+0xd6/0x410 [ 147.847787][ T8484] __se_sys_recvmmsg+0x24a/0x410 [ 147.852726][ T8484] __x64_sys_recvmmsg+0x62/0x80 [ 147.857587][ T8484] do_syscall_64+0x9f/0x140 [ 147.862088][ T8484] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.867968][ T8484] RIP: 0033:0x443789 [ 147.871943][ T8484] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 147.892508][ T8484] RSP: 002b:00007ffcf2b89a68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b [ 147.901930][ T8484] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443789 [ 147.909893][ T8484] RDX: 0000000000000001 RSI: 0000000020001500 RDI: 0000000000000003 [ 147.917867][ T8484] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000d [ 147.925826][ T8484] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf2b89a80 [ 147.933779][ T8484] R13: 00000000000f4240 R14: 0000000000023ea9 R15: 00007ffcf2b89a74 [ 147.942199][ T8484] Kernel Offset: disabled [ 147.946800][ T8484] Rebooting in 86400 seconds..