[ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts. syzkaller login: [ 63.253097][ T6820] IPVS: ftp: loaded support on port[0] = 21 [ 63.339567][ T6820] chnl_net:caif_netlink_parms(): no params data found [ 63.392408][ T6820] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.400128][ T6820] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.409223][ T6820] device bridge_slave_0 entered promiscuous mode [ 63.419432][ T6820] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.427588][ T6820] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.435691][ T6820] device bridge_slave_1 entered promiscuous mode [ 63.456533][ T6820] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.468059][ T6820] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.491921][ T6820] team0: Port device team_slave_0 added [ 63.499998][ T6820] team0: Port device team_slave_1 added [ 63.518960][ T6820] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 63.526086][ T6820] 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. [ 63.553776][ T6820] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 63.567676][ T6820] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 63.575763][ T6820] 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. [ 63.603495][ T6820] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 63.685074][ T6820] device hsr_slave_0 entered promiscuous mode [ 63.741852][ T6820] device hsr_slave_1 entered promiscuous mode [ 63.892720][ T6820] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 63.935091][ T6820] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 63.983879][ T6820] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 64.024154][ T6820] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 64.098041][ T6820] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.105728][ T6820] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.113881][ T6820] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.120948][ T6820] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.166663][ T6820] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.179912][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.190509][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.199108][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.208405][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 64.221610][ T6820] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.234642][ T2567] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.243179][ T2567] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.250381][ T2567] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.263379][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.273130][ T2498] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.280186][ T2498] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.303876][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.313067][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.323013][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.335507][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 64.344779][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.357406][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 64.368914][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.380313][ T6820] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.399342][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 64.407338][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 64.420185][ T6820] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.446327][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 64.457008][ T2498] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 64.478266][ T6820] device veth0_vlan entered promiscuous mode [ 64.485621][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 64.494856][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 64.505034][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 64.513863][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 64.526299][ T6820] device veth1_vlan entered promiscuous mode [ 64.547751][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 64.556891][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 64.565413][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 64.574393][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 64.586434][ T6820] device veth0_macvtap entered promiscuous mode [ 64.598431][ T6820] device veth1_macvtap entered promiscuous mode [ 64.616238][ T6820] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 64.624246][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 64.633031][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 64.642149][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 64.650683][ T2518] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 64.664318][ T6820] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 64.671828][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 64.680422][ T2579] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program [ 65.204454][ T7036] device gretap0 entered promiscuous mode [ 65.264125][ C1] ------------[ cut here ]------------ [ 65.264131][ C1] WARNING: CPU: 1 PID: 7036 at net/core/dev.c:8992 rollback_registered_many+0xbdb/0xf60 [ 65.264133][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 65.264137][ C1] CPU: 1 PID: 7036 Comm: syz-executor966 Not tainted 5.8.0-rc2-syzkaller #0 [ 65.264141][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.264142][ C1] Call Trace: [ 65.264144][ C1] dump_stack+0x18f/0x20d [ 65.264145][ C1] panic+0x2e3/0x75c [ 65.264147][ C1] ? __warn_printk+0xf3/0xf3 [ 65.264149][ C1] ? printk+0xba/0xed [ 65.264151][ C1] ? log_store.cold+0x16/0x16 [ 65.264152][ C1] ? __warn.cold+0x5/0x45 [ 65.264154][ C1] ? __warn+0xd6/0x1f2 [ 65.264156][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 65.264158][ C1] __warn.cold+0x20/0x45 [ 65.264160][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 65.264162][ C1] report_bug+0x1bd/0x210 [ 65.264164][ C1] exc_invalid_op+0x24d/0x400 [ 65.264166][ C1] ? exc_overflow+0x40/0x40 [ 65.264168][ C1] ? mark_lock+0xbc/0x1710 [ 65.264170][ C1] asm_exc_invalid_op+0x12/0x20 [ 65.264172][ C1] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 65.264180][ C1] Code: 00 00 31 f6 4c 89 f7 e8 f3 d9 fc ff e9 4f fe ff ff 4c 89 e7 e9 48 fd ff ff e8 31 65 3e fb 0f 0b e9 da fd ff ff e8 25 65 3e fb <0f> 0b e9 18 fe ff ff e8 19 65 3e fb 0f b6 2d de 64 74 04 31 ff 89 [ 65.264182][ C1] RSP: 0018:ffffc90001f5ef60 EFLAGS: 00010293 [ 65.264186][ C1] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8634e915 [ 65.264190][ C1] RDX: ffff8880949f0000 RSI: ffffffff8634eb2b RDI: 0000000000000005 [ 65.264193][ C1] RBP: ffff888094a6e0b8 R08: 0000000000000000 R09: ffffffff8a7b01c7 [ 65.264196][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a693ea00 [ 65.264199][ C1] R13: 0000000000034960 R14: ffff888094a6e000 R15: 0000000000000000 [ 65.264201][ C1] ? rollback_registered_many+0x9c5/0xf60 [ 65.264203][ C1] ? rollback_registered_many+0xbdb/0xf60 [ 65.264205][ C1] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 65.264207][ C1] ? dev_set_mtu_ext+0x590/0x590 [ 65.264209][ C1] unregister_netdevice_queue+0x2dd/0x570 [ 65.264212][ C1] ? unregister_netdevice_many+0x50/0x50 [ 65.264213][ C1] ? is_hsr_master+0x9/0x70 [ 65.264215][ C1] ? hsr_add_port+0x4f3/0x790 [ 65.264217][ C1] hsr_dev_finalize+0x5ce/0x746 [ 65.264219][ C1] hsr_newlink+0x27c/0x520 [ 65.264221][ C1] ? hsr_dellink+0x70/0x70 [ 65.264223][ C1] ? rtnl_create_link+0x184/0xad0 [ 65.264225][ C1] ? hsr_dellink+0x70/0x70 [ 65.264227][ C1] __rtnl_newlink+0x1090/0x1730 [ 65.264228][ C1] ? rtnl_setlink+0x3c0/0x3c0 [ 65.264230][ C1] ? lock_downgrade+0x820/0x820 [ 65.264233][ C1] ? check_preemption_disabled+0x38/0x220 [ 65.264235][ C1] ? is_bpf_text_address+0xcb/0x160 [ 65.264237][ C1] ? kernel_text_address+0xbd/0xf0 [ 65.264239][ C1] ? __kernel_text_address+0x9/0x30 [ 65.264241][ C1] ? unwind_get_return_address+0x51/0x90 [ 65.264243][ C1] ? profile_setup.cold+0xc1/0xc1 [ 65.264245][ C1] ? arch_stack_walk+0x97/0xf0 [ 65.264247][ C1] ? stack_trace_save+0x8c/0xc0 [ 65.264249][ C1] ? stack_trace_consume_entry+0x160/0x160 [ 65.264251][ C1] ? __kasan_slab_free+0xf5/0x140 [ 65.264253][ C1] ? kmem_cache_free+0x7f/0x310 [ 65.264255][ C1] ? mark_lock+0xbc/0x1710 [ 65.264257][ C1] ? trace_kmalloc+0xfd/0x130 [ 65.264259][ C1] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 65.264261][ C1] rtnl_newlink+0x64/0xa0 [ 65.264263][ C1] ? __rtnl_newlink+0x1730/0x1730 [ 65.264265][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 65.264267][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 65.264269][ C1] ? lock_acquire+0x1f1/0xad0 [ 65.264271][ C1] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 65.264273][ C1] netlink_rcv_skb+0x15a/0x430 [ 65.264275][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 65.264277][ C1] ? netlink_ack+0xa10/0xa10 [ 65.264279][ C1] netlink_unicast+0x533/0x7d0 [ 65.264281][ C1] ? netlink_attachskb+0x810/0x810 [ 65.264283][ C1] ? _copy_from_iter_full+0x247/0x890 [ 65.264285][ C1] ? __phys_addr+0x9a/0x110 [ 65.264287][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 65.264289][ C1] ? __check_object_size+0x171/0x3e4 [ 65.264291][ C1] netlink_sendmsg+0x856/0xd90 [ 65.264293][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 65.264295][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 65.264296][ C1] sock_sendmsg+0xcf/0x120 [ 65.264298][ C1] ____sys_sendmsg+0x6e8/0x810 [ 65.264300][ C1] ? kernel_sendmsg+0x50/0x50 [ 65.264302][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 65.264304][ C1] ? find_held_lock+0x2d/0x110 [ 65.264306][ C1] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.264308][ C1] ? __wake_up_common_lock+0xde/0x130 [ 65.264310][ C1] ___sys_sendmsg+0xf3/0x170 [ 65.264312][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 65.264314][ C1] ? lock_downgrade+0x820/0x820 [ 65.264316][ C1] ? __might_fault+0x190/0x1d0 [ 65.264318][ C1] ? _copy_to_user+0x126/0x160 [ 65.264320][ C1] ? move_addr_to_user+0xb5/0x200 [ 65.264322][ C1] ? __fget_light+0x215/0x280 [ 65.264324][ C1] __sys_sendmsg+0xe5/0x1b0 [ 65.264326][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 65.264327][ C1] ? do_syscall_64+0x1c/0xe0 [ 65.264330][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.264332][ C1] do_syscall_64+0x60/0xe0 [ 65.264334][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.264335][ C1] RIP: 0033:0x443ee9 [ 65.264337][ C1] Code: Bad RIP value. [ 65.264339][ C1] RSP: 002b:00007ffe34db5118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 65.264345][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443ee9 [ 65.264348][ C1] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 65.264351][ C1] RBP: 00007ffe34db5120 R08: 0000000000000000 R09: 0000000000000000 [ 65.264354][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000fdfc [ 65.264359][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.265876][ C1] Kernel Offset: disabled