[ 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 '10.128.1.87' (ECDSA) to the list of known hosts. syzkaller login: [ 34.327479] IPVS: ftp: loaded support on port[0] = 21 [ 34.420718] chnl_net:caif_netlink_parms(): no params data found [ 34.480250] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.486778] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.494839] device bridge_slave_0 entered promiscuous mode [ 34.502974] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.509415] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.516313] device bridge_slave_1 entered promiscuous mode [ 34.533527] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 34.542389] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 34.560934] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 34.568400] team0: Port device team_slave_0 added [ 34.574223] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 34.581812] team0: Port device team_slave_1 added [ 34.596460] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 34.602741] 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. [ 34.628154] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 34.640740] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 34.646965] 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. [ 34.672365] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 34.683081] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 34.690692] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 34.710360] device hsr_slave_0 entered promiscuous mode [ 34.716039] device hsr_slave_1 entered promiscuous mode [ 34.722364] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 34.729531] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 34.792396] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.798821] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.805932] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.812378] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.843032] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 34.851103] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.858775] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 34.867960] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.877089] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.885048] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.892625] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 34.903850] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 34.910191] 8021q: adding VLAN 0 to HW filter on device team0 [ 34.919308] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 34.926890] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.933291] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.942871] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 34.952146] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.958555] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.976806] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 34.987193] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 34.998685] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 35.006484] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 35.015132] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 35.023061] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 35.031221] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 35.039947] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 35.046715] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 35.058611] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 35.067940] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 35.075466] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 35.086357] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 35.097489] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 35.109610] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 35.143980] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 35.151537] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 35.157997] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 35.168752] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 35.177263] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 35.184722] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 35.193636] device veth0_vlan entered promiscuous mode [ 35.202912] device veth1_vlan entered promiscuous mode [ 35.208711] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 35.215354] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 35.224861] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 35.236572] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 35.246074] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 35.253785] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 35.264448] device veth0_macvtap entered promiscuous mode [ 35.271076] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 35.278850] device veth1_macvtap entered promiscuous mode [ 35.287962] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 35.297976] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 35.307733] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 35.314954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 35.323336] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 35.333223] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 35.341107] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program executing program executing program [ 35.461012] divide error: 0000 [#1] PREEMPT SMP KASAN [ 35.466312] CPU: 1 PID: 8375 Comm: syz-executor191 Not tainted 4.19.211-syzkaller #0 [ 35.474177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.483626] RIP: 0010:netem_enqueue+0x1217/0x3170 [ 35.488509] Code: f6 74 1f 4c 89 44 24 20 89 4c 24 18 89 44 24 10 e8 9e b4 02 fb 4c 8b 44 24 20 8b 4c 24 18 8b 44 24 10 2b 8d 84 00 00 00 31 d2 f1 48 b8 00 00 00 00 00 fc ff df 49 01 d6 4c 89 f1 48 c1 e9 03 [ 35.507399] RSP: 0018:ffff8880957a76d8 EFLAGS: 00010246 [ 35.512746] RAX: 00000000336d57df RBX: 0000000000000010 RCX: 0000000000000000 [ 35.520001] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88809f03ee44 [ 35.527321] RBP: ffff88809f03edc0 R08: ffff88809f03ee98 R09: 0000000000000000 [ 35.534576] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 35.541839] R13: 0000000000000000 R14: ffff88809bf71780 R15: ffff8880aed31680 [ 35.549092] FS: 00007f0c010d9700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.557385] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.563258] CR2: 00000000200000c0 CR3: 000000009b602000 CR4: 00000000003406e0 [ 35.570538] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.577788] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.585038] Call Trace: [ 35.587613] ? ___sys_sendmsg+0x7bb/0x8e0 [ 35.591741] ? __x64_sys_sendmsg+0x132/0x220 [ 35.596137] ? do_syscall_64+0xf9/0x620 [ 35.600190] ? netem_dequeue+0xd90/0xd90 [ 35.604245] ? __dev_queue_xmit+0x134e/0x2e00 [ 35.608749] __dev_queue_xmit+0x140a/0x2e00 [ 35.613063] ? memcpy+0x35/0x50 [ 35.616324] ? netdev_pick_tx+0x2f0/0x2f0 [ 35.620454] ? __copy_skb_header+0x414/0x500 [ 35.624842] ? kfree_skbmem+0x140/0x140 [ 35.628820] ? skb_clone+0x151/0x3d0 [ 35.632516] ? __skb_clone+0x5ce/0x7c0 [ 35.636387] ? kmem_cache_alloc+0x315/0x370 [ 35.640690] netlink_deliver_tap+0x8fb/0xb00 [ 35.645079] netlink_unicast+0x545/0x690 [ 35.649141] ? netlink_sendskb+0x110/0x110 [ 35.653358] ? _copy_from_iter_full+0x229/0x7c0 [ 35.658008] ? __check_object_size+0x30/0x3e0 [ 35.662496] netlink_sendmsg+0x6c3/0xc50 [ 35.666538] ? aa_af_perm+0x230/0x230 [ 35.670318] ? nlmsg_notify+0x1f0/0x1f0 [ 35.674271] ? kernel_recvmsg+0x220/0x220 [ 35.678402] ? nlmsg_notify+0x1f0/0x1f0 [ 35.682402] sock_sendmsg+0xc3/0x120 [ 35.686095] ___sys_sendmsg+0x7bb/0x8e0 [ 35.690049] ? copy_msghdr_from_user+0x440/0x440 [ 35.694789] ? __fget+0x32f/0x510 [ 35.698228] ? lock_downgrade+0x720/0x720 [ 35.702354] ? check_preemption_disabled+0x41/0x280 [ 35.707350] ? check_preemption_disabled+0x41/0x280 [ 35.712346] ? __fget+0x356/0x510 [ 35.715779] ? do_dup2+0x450/0x450 [ 35.719303] ? __fd_install+0x1b4/0x610 [ 35.723380] ? __fdget+0x1d0/0x230 [ 35.726911] __x64_sys_sendmsg+0x132/0x220 [ 35.731167] ? __sys_sendmsg+0x1b0/0x1b0 [ 35.735219] ? __se_sys_futex+0x298/0x3b0 [ 35.739601] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.744950] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.749952] ? do_syscall_64+0x21/0x620 [ 35.753915] do_syscall_64+0xf9/0x620 [ 35.757900] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.763075] RIP: 0033:0x7f0c01934e79 [ 35.766773] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 35.785671] RSP: 002b:00007f0c010d9308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.793360] RAX: ffffffffffffffda RBX: 00007f0c019b64a8 RCX: 00007f0c01934e79 [ 35.800608] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 [ 35.807869] RBP: 00007f0c019b64a0 R08: 0000000000000000 R09: 0000000000000000 [ 35.815114] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c019b64ac [ 35.822362] R13: 00007f0c01983818 R14: 0004000c00000000 R15: 0000000000022000 [ 35.829610] Modules linked in: [ 35.832822] ---[ end trace d03721d2bae6e2f8 ]--- [ 35.837578] RIP: 0010:netem_enqueue+0x1217/0x3170 [ 35.842412] Code: f6 74 1f 4c 89 44 24 20 89 4c 24 18 89 44 24 10 e8 9e b4 02 fb 4c 8b 44 24 20 8b 4c 24 18 8b 44 24 10 2b 8d 84 00 00 00 31 d2 f1 48 b8 00 00 00 00 00 fc ff df 49 01 d6 4c 89 f1 48 c1 e9 03 [ 35.861301] RSP: 0018:ffff8880957a76d8 EFLAGS: 00010246 [ 35.866649] RAX: 00000000336d57df RBX: 0000000000000010 RCX: 0000000000000000 [ 35.873922] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88809f03ee44 [ 35.881201] RBP: ffff88809f03edc0 R08: ffff88809f03ee98 R09: 0000000000000000 [ 35.888546] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 35.895805] R13: 0000000000000000 R14: ffff88809bf71780 R15: ffff8880aed31680 [ 35.903069] FS: 00007f0c010d9700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.911302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.917166] CR2: 00000000200000c0 CR3: 000000009b602000 CR4: 00000000003406e0 [ 35.924440] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.931721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.938984] Kernel panic - not syncing: Fatal exception in interrupt [ 35.945716] Kernel Offset: disabled [ 35.949325] Rebooting in 86400 seconds..