[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 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 '10.128.0.173' (ECDSA) to the list of known hosts. syzkaller login: [ 59.863070][ T7076] IPVS: ftp: loaded support on port[0] = 21 [ 59.954374][ T7076] chnl_net:caif_netlink_parms(): no params data found [ 60.004953][ T7076] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.012553][ T7076] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.021107][ T7076] device bridge_slave_0 entered promiscuous mode [ 60.031018][ T7076] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.038558][ T7076] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.046174][ T7076] device bridge_slave_1 entered promiscuous mode [ 60.066606][ T7076] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.078286][ T7076] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.101046][ T7076] team0: Port device team_slave_0 added [ 60.109329][ T7076] team0: Port device team_slave_1 added [ 60.126435][ T7076] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 60.133420][ T7076] 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. [ 60.160253][ T7076] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 60.173097][ T7076] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 60.180510][ T7076] 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. [ 60.208064][ T7076] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 60.272971][ T7076] device hsr_slave_0 entered promiscuous mode [ 60.317956][ T7076] device hsr_slave_1 entered promiscuous mode [ 60.442971][ T7076] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 60.491092][ T7076] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.539744][ T7076] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.599723][ T7076] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.673098][ T7076] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.680275][ T7076] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.688165][ T7076] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.695228][ T7076] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.741476][ T7076] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.755175][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.765916][ T2997] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.774669][ T2997] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.783149][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 60.796536][ T7076] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.807546][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.815944][ T2714] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.823114][ T2714] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.834626][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.844349][ T2997] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.851450][ T2997] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.877896][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.886326][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.896211][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.909896][ T7076] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.921759][ T7076] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.930483][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.938816][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.958639][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.965995][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.980268][ T7076] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.000008][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 61.009626][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 61.033110][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 61.041952][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 61.051678][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 61.060066][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 61.070138][ T7076] device veth0_vlan entered promiscuous mode [ 61.081804][ T7076] device veth1_vlan entered promiscuous mode [ 61.103671][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 61.112485][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 61.121437][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 61.130315][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 61.141276][ T7076] device veth0_macvtap entered promiscuous mode [ 61.152420][ T7076] device veth1_macvtap entered promiscuous mode [ 61.169816][ T7076] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 61.177139][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 61.187938][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 61.195774][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 61.204497][ T2714] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 61.216614][ T7076] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 61.224327][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 61.234339][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 61.510905][ T7285] device ip6gretap0 entered promiscuous mode [ 61.581452][ T7285] device ip6gretap0 left promiscuous mode [ 61.719380][ T7286] sysctl duplicate entry: /net/ipv4/neigh/hsr1//mcast_solicit [ 61.727031][ T7286] CPU: 1 PID: 7286 Comm: syz-executor779 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 61.736900][ T7286] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.746932][ T7286] Call Trace: [ 61.750205][ T7286] dump_stack+0x188/0x20d [ 61.754579][ T7286] __register_sysctl_table+0x801/0xef0 [ 61.760031][ T7286] neigh_sysctl_register+0x347/0x680 [ 61.765309][ T7286] ? neigh_stat_seq_show+0x3f0/0x3f0 [ 61.770580][ T7286] ? lock_downgrade+0x840/0x840 [ 61.775409][ T7286] ? mark_held_locks+0x9f/0xe0 [ 61.780164][ T7286] ? __local_bh_enable_ip+0x159/0x270 [ 61.785564][ T7286] devinet_sysctl_register+0xb1/0x230 [ 61.790917][ T7286] inetdev_init+0x227/0x4b0 [ 61.795399][ T7286] inetdev_event+0xfdb/0x15b0 [ 61.800052][ T7286] ? update_gid_event_work_handler+0xb0/0xb0 [ 61.806026][ T7286] ? add_netdev_ips+0x40/0x40 [ 61.810694][ T7286] ? upper_device_filter+0x1a0/0x1a0 [ 61.815959][ T7286] ? is_ndev_for_default_gid_filter.part.0+0x250/0x250 [ 61.822817][ T7286] ? inetdev_init+0x4b0/0x4b0 [ 61.827470][ T7286] ? is_eth_port_of_netdev_filter.part.0+0x2c0/0x2c0 [ 61.834118][ T7286] ? skb_dequeue+0x153/0x1c0 [ 61.838732][ T7286] ? notifier_call_chain+0xc0/0x230 [ 61.843903][ T7286] notifier_call_chain+0xc0/0x230 [ 61.848951][ T7286] call_netdevice_notifiers_info+0xb5/0x130 [ 61.854857][ T7286] register_netdevice+0xd70/0x10b0 [ 61.859995][ T7286] ? netdev_change_features+0xb0/0xb0 [ 61.865464][ T7286] ? hsr_add_port+0x4f4/0x790 [ 61.870122][ T7286] hsr_dev_finalize+0x516/0x746 [ 61.874965][ T7286] hsr_newlink+0x27c/0x520 [ 61.879355][ T7286] ? hsr_fill_info+0x2d0/0x2d0 [ 61.884113][ T7286] ? rtnl_create_link+0x184/0xac0 [ 61.889134][ T7286] ? hsr_fill_info+0x2d0/0x2d0 [ 61.893873][ T7286] __rtnl_newlink+0xf18/0x1590 [ 61.898619][ T7286] ? rtnl_link_unregister+0x240/0x240 [ 61.903965][ T7286] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.910016][ T7286] ? is_bpf_text_address+0xcb/0x160 [ 61.915200][ T7286] ? kernel_text_address+0x6e/0xe0 [ 61.920284][ T7286] ? __kernel_text_address+0x9/0x30 [ 61.925455][ T7286] ? unwind_get_return_address+0x5a/0xa0 [ 61.931076][ T7286] ? profile_setup.cold+0xc1/0xc1 [ 61.936080][ T7286] ? arch_stack_walk+0x84/0xd0 [ 61.940825][ T7286] ? stack_trace_save+0x8c/0xc0 [ 61.945647][ T7286] ? stack_trace_consume_entry+0x160/0x160 [ 61.951457][ T7286] ? rtnl_newlink+0x46/0xa0 [ 61.955935][ T7286] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.961468][ T7286] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.967435][ T7286] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.973232][ T7286] rtnl_newlink+0x64/0xa0 [ 61.977538][ T7286] ? __rtnl_newlink+0x1590/0x1590 [ 61.982545][ T7286] rtnetlink_rcv_msg+0x44e/0xad0 [ 61.987458][ T7286] ? rtnl_bridge_getlink+0x870/0x870 [ 61.992731][ T7286] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 61.998000][ T7286] ? __copy_skb_header+0x210/0x5b0 [ 62.003100][ T7286] ? skb_splice_bits+0x1a0/0x1a0 [ 62.008012][ T7286] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.013796][ T7286] ? kmem_cache_alloc+0x261/0x740 [ 62.018901][ T7286] netlink_rcv_skb+0x15a/0x410 [ 62.023639][ T7286] ? rtnl_bridge_getlink+0x870/0x870 [ 62.028900][ T7286] ? netlink_ack+0xa10/0xa10 [ 62.033469][ T7286] netlink_unicast+0x537/0x740 [ 62.038209][ T7286] ? netlink_attachskb+0x810/0x810 [ 62.043304][ T7286] ? _copy_from_iter_full+0x25c/0x870 [ 62.048666][ T7286] ? __phys_addr_symbol+0x2c/0x70 [ 62.053682][ T7286] ? __check_object_size+0x171/0x437 [ 62.058953][ T7286] netlink_sendmsg+0x882/0xe10 [ 62.063701][ T7286] ? aa_af_perm+0x260/0x260 [ 62.068177][ T7286] ? netlink_unicast+0x740/0x740 [ 62.073092][ T7286] ? netlink_unicast+0x740/0x740 [ 62.078004][ T7286] sock_sendmsg+0xcf/0x120 [ 62.082395][ T7286] ____sys_sendmsg+0x6bf/0x7e0 [ 62.087139][ T7286] ? kernel_sendmsg+0x50/0x50 [ 62.091801][ T7286] ___sys_sendmsg+0x100/0x170 [ 62.096464][ T7286] ? sendmsg_copy_msghdr+0x70/0x70 [ 62.101556][ T7286] ? __fget_files+0x32f/0x500 [ 62.106218][ T7286] ? do_dup2+0x520/0x520 [ 62.110442][ T7286] ? mark_held_locks+0xe0/0xe0 [ 62.115182][ T7286] ? __fget_light+0x20e/0x270 [ 62.119851][ T7286] __sys_sendmsg+0xec/0x1b0 [ 62.124327][ T7286] ? __sys_sendmsg_sock+0xb0/0xb0 [ 62.129353][ T7286] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.135074][ T7286] ? do_syscall_64+0x21/0x7d0 [ 62.139764][ T7286] do_syscall_64+0xf6/0x7d0 [ 62.144242][ T7286] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.150109][ T7286] RIP: 0033:0x449409 [ 62.153981][ T7286] Code: e8 cc 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.173555][ T7286] RSP: 002b:00007fa3c08b0db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.181942][ T7286] RAX: ffffffffffffffda RBX: 00000000006dfc98 RCX: 0000000000449409 [ 62.189890][ T7286] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 62.197837][ T7286] RBP: 00000000006dfc90 R08: 0000000000000014 R09: 0000000000000000 [ 62.205781][ T7286] R10: 0000000000000001 R11: 0000000000000246 R12: 00000000006dfc9c [ 62.213728][ T7286] R13: 00007ffc318e2f1f R14: 00007fa3c08b19c0 R15: 00000000006dfc9c [ 62.349579][ T7291] sysctl duplicate entry: /net/ipv4/conf/hsr1//forwarding [ 62.356725][ T7291] CPU: 0 PID: 7291 Comm: syz-executor779 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 62.366588][ T7291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.376633][ T7291] Call Trace: [ 62.379901][ T7291] dump_stack+0x188/0x20d [ 62.384209][ T7291] __register_sysctl_table+0x801/0xef0 [ 62.389649][ T7291] __devinet_sysctl_register+0x156/0x280 [ 62.395258][ T7291] ? devinet_exit_net+0x170/0x170 [ 62.400264][ T7291] ? mark_held_locks+0x9f/0xe0 [ 62.405014][ T7291] ? __local_bh_enable_ip+0x159/0x270 [ 62.410378][ T7291] devinet_sysctl_register+0x160/0x230 [ 62.415812][ T7291] inetdev_init+0x227/0x4b0 [ 62.420289][ T7291] inetdev_event+0xfdb/0x15b0 [ 62.424939][ T7291] ? update_gid_event_work_handler+0xb0/0xb0 [ 62.430909][ T7291] ? add_netdev_ips+0x40/0x40 [ 62.435572][ T7291] ? upper_device_filter+0x1a0/0x1a0 [ 62.440848][ T7291] ? is_ndev_for_default_gid_filter.part.0+0x250/0x250 [ 62.447668][ T7291] ? inetdev_init+0x4b0/0x4b0 [ 62.452322][ T7291] ? is_eth_port_of_netdev_filter.part.0+0x2c0/0x2c0 [ 62.458970][ T7291] ? skb_dequeue+0x153/0x1c0 [ 62.463537][ T7291] ? notifier_call_chain+0xc0/0x230 [ 62.468723][ T7291] notifier_call_chain+0xc0/0x230 [ 62.473744][ T7291] call_netdevice_notifiers_info+0xb5/0x130 [ 62.479622][ T7291] register_netdevice+0xd70/0x10b0 [ 62.484715][ T7291] ? netdev_change_features+0xb0/0xb0 [ 62.490121][ T7291] ? hsr_add_port+0x4f4/0x790 [ 62.494790][ T7291] hsr_dev_finalize+0x516/0x746 [ 62.499663][ T7291] hsr_newlink+0x27c/0x520 [ 62.504091][ T7291] ? hsr_fill_info+0x2d0/0x2d0 [ 62.508835][ T7291] ? rtnl_create_link+0x184/0xac0 [ 62.513837][ T7291] ? hsr_fill_info+0x2d0/0x2d0 [ 62.518576][ T7291] __rtnl_newlink+0xf18/0x1590 [ 62.523324][ T7291] ? rtnl_link_unregister+0x240/0x240 [ 62.528683][ T7291] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.534730][ T7291] ? is_bpf_text_address+0xcb/0x160 [ 62.539901][ T7291] ? kernel_text_address+0x6e/0xe0 [ 62.545049][ T7291] ? __kernel_text_address+0x9/0x30 [ 62.550227][ T7291] ? unwind_get_return_address+0x5a/0xa0 [ 62.555848][ T7291] ? profile_setup.cold+0xc1/0xc1 [ 62.560861][ T7291] ? arch_stack_walk+0x84/0xd0 [ 62.565643][ T7291] ? stack_trace_save+0x8c/0xc0 [ 62.570473][ T7291] ? stack_trace_consume_entry+0x160/0x160 [ 62.576288][ T7291] ? rtnl_newlink+0x46/0xa0 [ 62.580772][ T7291] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.586294][ T7291] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.592251][ T7291] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.598043][ T7291] rtnl_newlink+0x64/0xa0 [ 62.602392][ T7291] ? __rtnl_newlink+0x1590/0x1590 [ 62.607402][ T7291] rtnetlink_rcv_msg+0x44e/0xad0 [ 62.612333][ T7291] ? rtnl_bridge_getlink+0x870/0x870 [ 62.617598][ T7291] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 62.622869][ T7291] ? __copy_skb_header+0x210/0x5b0 [ 62.627961][ T7291] ? skb_splice_bits+0x1a0/0x1a0 [ 62.632875][ T7291] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.638654][ T7291] ? kmem_cache_alloc+0x261/0x740 [ 62.643690][ T7291] netlink_rcv_skb+0x15a/0x410 [ 62.648432][ T7291] ? rtnl_bridge_getlink+0x870/0x870 [ 62.653694][ T7291] ? netlink_ack+0xa10/0xa10 [ 62.658390][ T7291] netlink_unicast+0x537/0x740 [ 62.663134][ T7291] ? netlink_attachskb+0x810/0x810 [ 62.668217][ T7291] ? _copy_from_iter_full+0x25c/0x870 [ 62.673562][ T7291] ? __phys_addr_symbol+0x2c/0x70 [ 62.678560][ T7291] ? __check_object_size+0x171/0x437 [ 62.683820][ T7291] netlink_sendmsg+0x882/0xe10 [ 62.688563][ T7291] ? aa_af_perm+0x260/0x260 [ 62.693039][ T7291] ? netlink_unicast+0x740/0x740 [ 62.697956][ T7291] ? netlink_unicast+0x740/0x740 [ 62.702877][ T7291] sock_sendmsg+0xcf/0x120 [ 62.707269][ T7291] ____sys_sendmsg+0x6bf/0x7e0 [ 62.712010][ T7291] ? kernel_sendmsg+0x50/0x50 [ 62.716679][ T7291] ___sys_sendmsg+0x100/0x170 [ 62.721334][ T7291] ? sendmsg_copy_msghdr+0x70/0x70 [ 62.726442][ T7291] ? __fget_files+0x32f/0x500 [ 62.731097][ T7291] ? do_dup2+0x520/0x520 [ 62.735316][ T7291] ? lock_downgrade+0x840/0x840 [ 62.740143][ T7291] ? __fget_light+0x20e/0x270 [ 62.744815][ T7291] __sys_sendmsg+0xec/0x1b0 [ 62.749305][ T7291] ? __sys_sendmsg_sock+0xb0/0xb0 [ 62.754313][ T7291] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.760275][ T7291] ? __x64_sys_futex+0x380/0x4f0 [ 62.765200][ T7291] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.770895][ T7291] ? do_syscall_64+0x21/0x7d0 [ 62.775562][ T7291] do_syscall_64+0xf6/0x7d0 [ 62.780043][ T7291] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.785906][ T7291] RIP: 0033:0x449409 [ 62.789778][ T7291] Code: e8 cc 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.809364][ T7291] RSP: 002b:00007fa3c084ddb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.817746][ T7291] RAX: ffffffffffffffda RBX: 00000000006dfcc8 RCX: 0000000000449409 [ 62.825703][ T7291] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000011 [ 62.833646][ T7291] RBP: 00000000006dfcc0 R08: 0000000000000008 R09: 0000000000000000 [ 62.841692][ T7291] R10: 0000000000000002 R11: 0000000000000246 R12: 00000000006dfccc [ 62.849636][ T7291] R13: 00007ffc318e2f1f R14: 00007fa3c084e9c0 R15: 00000000006dfccc [ 63.000174][ T7289] ------------[ cut here ]------------ [ 63.005873][ T7289] proc_dir_entry 'dev_snmp6/hsr1' already registered [ 63.012851][ T7289] WARNING: CPU: 0 PID: 7289 at fs/proc/generic.c:362 proc_register+0x40b/0x580 [ 63.021779][ T7289] Kernel panic - not syncing: panic_on_warn set ... [ 63.028372][ T7289] CPU: 0 PID: 7289 Comm: syz-executor779 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 63.038260][ T7289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.048318][ T7289] Call Trace: [ 63.051585][ T7289] dump_stack+0x188/0x20d [ 63.055903][ T7289] ? proc_register+0x3f0/0x580 [ 63.060640][ T7289] panic+0x2e3/0x75c [ 63.064508][ T7289] ? add_taint.cold+0x16/0x16 [ 63.069162][ T7289] ? __probe_kernel_read+0x188/0x1d0 [ 63.074416][ T7289] ? __warn.cold+0x14/0x35 [ 63.078842][ T7289] ? __warn+0xd5/0x1c8 [ 63.082884][ T7289] ? proc_register+0x40b/0x580 [ 63.087662][ T7289] __warn.cold+0x2f/0x35 [ 63.091881][ T7289] ? proc_register+0x40b/0x580 [ 63.096618][ T7289] report_bug+0x27b/0x2f0 [ 63.100924][ T7289] do_error_trap+0x12b/0x220 [ 63.105486][ T7289] ? proc_register+0x40b/0x580 [ 63.110226][ T7289] do_invalid_op+0x32/0x40 [ 63.114612][ T7289] ? proc_register+0x40b/0x580 [ 63.119348][ T7289] invalid_op+0x23/0x30 [ 63.123478][ T7289] RIP: 0010:proc_register+0x40b/0x580 [ 63.128823][ T7289] Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 5c 01 00 00 48 8b 04 24 48 c7 c7 a0 7a 39 88 48 8b b0 d8 00 00 00 e8 4d 2d 61 ff <0f> 0b 48 c7 c7 a0 ac ac 89 e8 f7 5b f3 05 48 8b 4c 24 28 48 b8 00 [ 63.148431][ T7289] RSP: 0018:ffffc90005956cc8 EFLAGS: 00010282 [ 63.154475][ T7289] RAX: 0000000000000000 RBX: ffff8880a9138ac8 RCX: 0000000000000000 [ 63.162423][ T7289] RDX: 0000000000000000 RSI: ffffffff815ce211 RDI: fffff52000b2ad8b [ 63.170367][ T7289] RBP: ffff8880a1ab3a80 R08: ffff888087c40340 R09: ffffed1015cc66b1 [ 63.178322][ T7289] R10: ffff8880ae633587 R11: ffffed1015cc66b0 R12: 0000000000000000 [ 63.186264][ T7289] R13: dffffc0000000000 R14: ffff8880a6561240 R15: 0000000000000004 [ 63.194217][ T7289] ? vprintk_func+0x81/0x17e [ 63.198796][ T7289] ? proc_register+0x40b/0x580 [ 63.203534][ T7289] ? snmp6_seq_show+0x180/0x180 [ 63.208373][ T7289] proc_create_single_data+0xdb/0x130 [ 63.213718][ T7289] ? proc_create_seq_private+0x180/0x180 [ 63.219322][ T7289] ? kmem_cache_alloc_trace+0x390/0x7d0 [ 63.224843][ T7289] snmp6_register_dev+0xbe/0x140 [ 63.229755][ T7289] ipv6_add_dev+0x54b/0x10b0 [ 63.234335][ T7289] addrconf_notify+0x960/0x2310 [ 63.239161][ T7289] ? lock_downgrade+0x840/0x840 [ 63.243984][ T7289] ? tls_dev_event+0x107/0xc40 [ 63.248722][ T7289] ? mark_held_locks+0x9f/0xe0 [ 63.253458][ T7289] ? inet6_ifinfo_notify+0x150/0x150 [ 63.258720][ T7289] ? clusterip_netdev_event+0x465/0x640 [ 63.264250][ T7289] ? __local_bh_enable_ip+0x159/0x270 [ 63.269595][ T7289] ? clusterip_netdev_event+0x465/0x640 [ 63.275110][ T7289] ? tee_netdev_event+0x431/0x5d0 [ 63.280107][ T7289] ? ip6mr_device_event+0x1ab/0x220 [ 63.285279][ T7289] ? notifier_call_chain+0xc0/0x230 [ 63.290454][ T7289] notifier_call_chain+0xc0/0x230 [ 63.295470][ T7289] call_netdevice_notifiers_info+0xb5/0x130 [ 63.301365][ T7289] register_netdevice+0xd70/0x10b0 [ 63.306487][ T7289] ? netdev_change_features+0xb0/0xb0 [ 63.311838][ T7289] ? hsr_add_port+0x4f4/0x790 [ 63.316517][ T7289] hsr_dev_finalize+0x516/0x746 [ 63.321346][ T7289] hsr_newlink+0x27c/0x520 [ 63.325738][ T7289] ? hsr_fill_info+0x2d0/0x2d0 [ 63.330478][ T7289] ? rtnl_create_link+0x184/0xac0 [ 63.335477][ T7289] ? hsr_fill_info+0x2d0/0x2d0 [ 63.340214][ T7289] __rtnl_newlink+0xf18/0x1590 [ 63.344962][ T7289] ? rtnl_link_unregister+0x240/0x240 [ 63.350309][ T7289] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 63.356352][ T7289] ? is_bpf_text_address+0xcb/0x160 [ 63.361522][ T7289] ? kernel_text_address+0x6e/0xe0 [ 63.366603][ T7289] ? __kernel_text_address+0x9/0x30 [ 63.371777][ T7289] ? unwind_get_return_address+0x5a/0xa0 [ 63.377396][ T7289] ? profile_setup.cold+0xc1/0xc1 [ 63.382393][ T7289] ? arch_stack_walk+0x84/0xd0 [ 63.387149][ T7289] ? stack_trace_save+0x8c/0xc0 [ 63.391974][ T7289] ? stack_trace_consume_entry+0x160/0x160 [ 63.397796][ T7289] ? rtnl_newlink+0x46/0xa0 [ 63.402271][ T7289] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.407789][ T7289] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.413741][ T7289] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 63.419528][ T7289] rtnl_newlink+0x64/0xa0 [ 63.423829][ T7289] ? __rtnl_newlink+0x1590/0x1590 [ 63.428826][ T7289] rtnetlink_rcv_msg+0x44e/0xad0 [ 63.433744][ T7289] ? rtnl_bridge_getlink+0x870/0x870 [ 63.439002][ T7289] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 63.444271][ T7289] ? __copy_skb_header+0x210/0x5b0 [ 63.449371][ T7289] ? skb_splice_bits+0x1a0/0x1a0 [ 63.454301][ T7289] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 63.460125][ T7289] ? kmem_cache_alloc+0x261/0x740 [ 63.465173][ T7289] netlink_rcv_skb+0x15a/0x410 [ 63.469922][ T7289] ? rtnl_bridge_getlink+0x870/0x870 [ 63.475199][ T7289] ? netlink_ack+0xa10/0xa10 [ 63.479783][ T7289] netlink_unicast+0x537/0x740 [ 63.484545][ T7289] ? netlink_attachskb+0x810/0x810 [ 63.489769][ T7289] ? _copy_from_iter_full+0x25c/0x870 [ 63.495121][ T7289] ? __phys_addr_symbol+0x2c/0x70 [ 63.500122][ T7289] ? __check_object_size+0x171/0x437 [ 63.505386][ T7289] netlink_sendmsg+0x882/0xe10 [ 63.510129][ T7289] ? aa_af_perm+0x260/0x260 [ 63.514642][ T7289] ? netlink_unicast+0x740/0x740 [ 63.519707][ T7289] ? netlink_unicast+0x740/0x740 [ 63.524620][ T7289] sock_sendmsg+0xcf/0x120 [ 63.529045][ T7289] ____sys_sendmsg+0x6bf/0x7e0 [ 63.533784][ T7289] ? kernel_sendmsg+0x50/0x50 [ 63.538447][ T7289] ___sys_sendmsg+0x100/0x170 [ 63.543112][ T7289] ? sendmsg_copy_msghdr+0x70/0x70 [ 63.548214][ T7289] ? __fget_files+0x32f/0x500 [ 63.552869][ T7289] ? do_dup2+0x520/0x520 [ 63.557086][ T7289] ? lock_downgrade+0x840/0x840 [ 63.561912][ T7289] ? __fget_light+0x20e/0x270 [ 63.566563][ T7289] __sys_sendmsg+0xec/0x1b0 [ 63.571042][ T7289] ? __sys_sendmsg_sock+0xb0/0xb0 [ 63.576038][ T7289] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.581990][ T7289] ? __x64_sys_futex+0x380/0x4f0 [ 63.586907][ T7289] ? trace_hardirqs_off_caller+0x55/0x230 [ 63.592600][ T7289] ? do_syscall_64+0x21/0x7d0 [ 63.597255][ T7289] do_syscall_64+0xf6/0x7d0 [ 63.601736][ T7289] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 63.607599][ T7289] RIP: 0033:0x449409 [ 63.611472][ T7289] Code: e8 cc 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.631047][ T7289] RSP: 002b:00007fa3c088fdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.639440][ T7289] RAX: ffffffffffffffda RBX: 00000000006dfca8 RCX: 0000000000449409 [ 63.647407][ T7289] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 000000000000000e [ 63.655350][ T7289] RBP: 00000000006dfca0 R08: 0000000000000014 R09: 0000000000000000 [ 63.663295][ T7289] R10: 0000000000000001 R11: 0000000000000246 R12: 00000000006dfcac [ 63.671239][ T7289] R13: 00007ffc318e2f1f R14: 00007fa3c08909c0 R15: 00000000006dfcac [ 63.680493][ T7289] Kernel Offset: disabled [ 63.684941][ T7289] Rebooting in 86400 seconds..