Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. syzkaller login: [ 138.126998][ T8235] IPVS: ftp: loaded support on port[0] = 21 [ 138.287442][ T8235] chnl_net:caif_netlink_parms(): no params data found [ 138.374551][ T8235] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.381865][ T8235] bridge0: port 1(bridge_slave_0) entered disabled state [ 138.391247][ T8235] device bridge_slave_0 entered promiscuous mode [ 138.402211][ T8235] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.409631][ T8235] bridge0: port 2(bridge_slave_1) entered disabled state [ 138.419443][ T8235] device bridge_slave_1 entered promiscuous mode [ 138.455380][ T8235] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 138.468297][ T8235] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 138.502777][ T8235] team0: Port device team_slave_0 added [ 138.511958][ T8235] team0: Port device team_slave_1 added [ 138.541882][ T8235] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 138.548917][ T8235] 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. [ 138.575126][ T8235] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 138.588477][ T8235] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 138.595706][ T8235] 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. [ 138.622022][ T8235] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 138.664006][ T8235] device hsr_slave_0 entered promiscuous mode [ 138.671362][ T8235] device hsr_slave_1 entered promiscuous mode [ 138.847398][ T8235] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 138.860886][ T8235] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 138.891573][ T8235] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 138.903666][ T8235] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 138.988007][ T8235] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.995244][ T8235] bridge0: port 2(bridge_slave_1) entered forwarding state [ 139.002980][ T8235] bridge0: port 1(bridge_slave_0) entered blocking state [ 139.010182][ T8235] bridge0: port 1(bridge_slave_0) entered forwarding state [ 139.087778][ T8235] 8021q: adding VLAN 0 to HW filter on device bond0 [ 139.108878][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 139.119772][ T18] bridge0: port 1(bridge_slave_0) entered disabled state [ 139.130334][ T18] bridge0: port 2(bridge_slave_1) entered disabled state [ 139.142185][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 139.160827][ T8235] 8021q: adding VLAN 0 to HW filter on device team0 [ 139.178587][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 139.187322][ T2093] bridge0: port 1(bridge_slave_0) entered blocking state [ 139.194737][ T2093] bridge0: port 1(bridge_slave_0) entered forwarding state [ 139.210666][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 139.219871][ T50] bridge0: port 2(bridge_slave_1) entered blocking state [ 139.227246][ T50] bridge0: port 2(bridge_slave_1) entered forwarding state [ 139.255438][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 139.275119][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 139.285374][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 139.296576][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 139.313705][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 139.323693][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 139.339985][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 139.349134][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 139.370962][ T8235] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 139.384552][ T8235] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 139.394077][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 139.403297][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 139.438027][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 139.445738][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 139.465288][ T8235] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 139.499036][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 139.508495][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 139.540336][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 139.549758][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 139.560535][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 139.569737][ T2093] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 139.587422][ T8235] device veth0_vlan entered promiscuous mode [ 139.607275][ T8235] device veth1_vlan entered promiscuous mode [ 139.646313][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 139.655614][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 139.665003][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 139.674742][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 139.688577][ T8235] device veth0_macvtap entered promiscuous mode [ 139.702715][ T8235] device veth1_macvtap entered promiscuous mode [ 139.734919][ T8235] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 139.742331][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 139.751818][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 139.761298][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 139.771047][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 139.789272][ T8235] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 139.797633][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 139.808225][ T50] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 139.824910][ T8235] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.834629][ T8235] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.843536][ T8235] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 139.852406][ T8235] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 139.994167][ C0] ===================================================== [ 140.001141][ C0] BUG: KMSAN: uninit-value in ip_rcv_core+0xf4c/0x1480 [ 140.008027][ C0] CPU: 0 PID: 8445 Comm: syz-executor199 Not tainted 5.11.0-rc7-syzkaller #0 [ 140.016797][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.026860][ C0] Call Trace: [ 140.030142][ C0] [ 140.033004][ C0] dump_stack+0x21c/0x280 [ 140.037360][ C0] kmsan_report+0xfb/0x1e0 [ 140.041805][ C0] __msan_warning+0x5f/0xa0 [ 140.046327][ C0] ip_rcv_core+0xf4c/0x1480 [ 140.050854][ C0] ip_rcv+0xc7/0x820 [ 140.054766][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.059987][ C0] __netif_receive_skb+0x1ec/0x640 [ 140.065117][ C0] ? kmsan_internal_set_origin+0x85/0xc0 [ 140.070782][ C0] ? ip_local_deliver_finish+0x370/0x370 [ 140.076442][ C0] process_backlog+0x517/0xbd0 [ 140.081195][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 140.086478][ C0] napi_poll+0x428/0x15c0 [ 140.090824][ C0] net_rx_action+0x34c/0xd30 [ 140.095434][ C0] ? net_tx_action+0xd30/0xd30 [ 140.100198][ C0] __do_softirq+0x1b9/0x715 [ 140.104692][ C0] asm_call_irq_on_stack+0xf/0x20 [ 140.109703][ C0] [ 140.112654][ C0] do_softirq_own_stack+0x6e/0x90 [ 140.117681][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 140.122877][ C0] local_bh_enable+0x36/0x40 [ 140.127461][ C0] __dev_queue_xmit+0x3b3e/0x45c0 [ 140.132500][ C0] dev_queue_xmit+0x4b/0x60 [ 140.136986][ C0] ? netdev_core_pick_tx+0x5a0/0x5a0 [ 140.142304][ C0] packet_sendmsg+0x8778/0x9a60 [ 140.147144][ C0] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 140.152977][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.158190][ C0] ? kmsan_internal_set_origin+0x85/0xc0 [ 140.163840][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.169032][ C0] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 140.174848][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.180908][ C0] ? packet_getsockopt+0x1120/0x1120 [ 140.186177][ C0] __sys_sendto+0x9ea/0xc60 [ 140.190676][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.195858][ C0] __se_sys_sendto+0x107/0x130 [ 140.200639][ C0] __x64_sys_sendto+0x6e/0x90 [ 140.205310][ C0] do_syscall_64+0x9f/0x140 [ 140.209800][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.215679][ C0] RIP: 0033:0x443789 [ 140.219554][ C0] 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 [ 140.239188][ C0] RSP: 002b:00007ffd015c28f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 140.247588][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443789 [ 140.255564][ C0] RDX: 000000000000000e RSI: 0000000020000200 RDI: 0000000000000003 [ 140.263531][ C0] RBP: 0000000000000000 R08: 0000000020000040 R09: 0000000000000014 [ 140.271503][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd015c2920 [ 140.279457][ C0] R13: 00000000000f4240 R14: 00000000004b8018 R15: 00000000004004b8 [ 140.287415][ C0] [ 140.289735][ C0] Uninit was stored to memory at: [ 140.294730][ C0] kmsan_internal_chain_origin+0xad/0x130 [ 140.300456][ C0] __msan_chain_origin+0x57/0xa0 [ 140.305378][ C0] iptunnel_xmit+0xbd6/0xf20 [ 140.309954][ C0] udp_tunnel_xmit_skb+0x526/0x640 [ 140.315049][ C0] geneve_xmit+0x209e/0x3c20 [ 140.319622][ C0] xmit_one+0x2b6/0x760 [ 140.323779][ C0] __dev_queue_xmit+0x3426/0x45c0 [ 140.328802][ C0] dev_queue_xmit+0x4b/0x60 [ 140.333306][ C0] packet_sendmsg+0x8778/0x9a60 [ 140.338139][ C0] __sys_sendto+0x9ea/0xc60 [ 140.342630][ C0] __se_sys_sendto+0x107/0x130 [ 140.347387][ C0] __x64_sys_sendto+0x6e/0x90 [ 140.352065][ C0] do_syscall_64+0x9f/0x140 [ 140.356569][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.362445][ C0] [ 140.364749][ C0] Uninit was created at: [ 140.368967][ C0] kmsan_internal_poison_shadow+0x5c/0xf0 [ 140.374701][ C0] kmsan_slab_alloc+0x8d/0xe0 [ 140.379364][ C0] __kmalloc_node_track_caller+0xa37/0x1430 [ 140.385244][ C0] __alloc_skb+0x2f8/0xb30 [ 140.389677][ C0] alloc_skb_with_frags+0x1f3/0xc10 [ 140.394861][ C0] sock_alloc_send_pskb+0xdc1/0xf90 [ 140.400042][ C0] packet_sendmsg+0x6aab/0x9a60 [ 140.404892][ C0] __sys_sendto+0x9ea/0xc60 [ 140.409382][ C0] __se_sys_sendto+0x107/0x130 [ 140.414131][ C0] __x64_sys_sendto+0x6e/0x90 [ 140.418794][ C0] do_syscall_64+0x9f/0x140 [ 140.423283][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.429159][ C0] ===================================================== [ 140.436077][ C0] Disabling lock debugging due to kernel taint [ 140.442206][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 140.448767][ C0] CPU: 0 PID: 8445 Comm: syz-executor199 Tainted: G B 5.11.0-rc7-syzkaller #0 [ 140.458914][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.468981][ C0] Call Trace: [ 140.472244][ C0] [ 140.475072][ C0] dump_stack+0x21c/0x280 [ 140.479406][ C0] panic+0x4c6/0xea7 [ 140.483292][ C0] ? add_taint+0x17c/0x210 [ 140.487698][ C0] kmsan_report+0x1de/0x1e0 [ 140.492190][ C0] __msan_warning+0x5f/0xa0 [ 140.496681][ C0] ip_rcv_core+0xf4c/0x1480 [ 140.501181][ C0] ip_rcv+0xc7/0x820 [ 140.505080][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.510281][ C0] __netif_receive_skb+0x1ec/0x640 [ 140.515391][ C0] ? kmsan_internal_set_origin+0x85/0xc0 [ 140.521010][ C0] ? ip_local_deliver_finish+0x370/0x370 [ 140.526633][ C0] process_backlog+0x517/0xbd0 [ 140.531426][ C0] ? rps_trigger_softirq+0x2e0/0x2e0 [ 140.536725][ C0] napi_poll+0x428/0x15c0 [ 140.541044][ C0] net_rx_action+0x34c/0xd30 [ 140.545640][ C0] ? net_tx_action+0xd30/0xd30 [ 140.550418][ C0] __do_softirq+0x1b9/0x715 [ 140.554912][ C0] asm_call_irq_on_stack+0xf/0x20 [ 140.559923][ C0] [ 140.562840][ C0] do_softirq_own_stack+0x6e/0x90 [ 140.567910][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 140.573095][ C0] local_bh_enable+0x36/0x40 [ 140.577672][ C0] __dev_queue_xmit+0x3b3e/0x45c0 [ 140.582694][ C0] dev_queue_xmit+0x4b/0x60 [ 140.587207][ C0] ? netdev_core_pick_tx+0x5a0/0x5a0 [ 140.592476][ C0] packet_sendmsg+0x8778/0x9a60 [ 140.597311][ C0] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 140.603108][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.608300][ C0] ? kmsan_internal_set_origin+0x85/0xc0 [ 140.613965][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.619153][ C0] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 140.624953][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.631013][ C0] ? packet_getsockopt+0x1120/0x1120 [ 140.636299][ C0] __sys_sendto+0x9ea/0xc60 [ 140.640858][ C0] ? kmsan_get_metadata+0x116/0x180 [ 140.646043][ C0] __se_sys_sendto+0x107/0x130 [ 140.650806][ C0] __x64_sys_sendto+0x6e/0x90 [ 140.655470][ C0] do_syscall_64+0x9f/0x140 [ 140.659966][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.665849][ C0] RIP: 0033:0x443789 [ 140.669725][ C0] 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 [ 140.689316][ C0] RSP: 002b:00007ffd015c28f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 140.697712][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443789 [ 140.705691][ C0] RDX: 000000000000000e RSI: 0000000020000200 RDI: 0000000000000003 [ 140.713676][ C0] RBP: 0000000000000000 R08: 0000000020000040 R09: 0000000000000014 [ 140.721650][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd015c2920 [ 140.729624][ C0] R13: 00000000000f4240 R14: 00000000004b8018 R15: 00000000004004b8 [ 140.738032][ C0] Kernel Offset: disabled [ 140.742355][ C0] Rebooting in 86400 seconds..