[ 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 '10.128.0.37' (ECDSA) to the list of known hosts. syzkaller login: [ 35.741442] IPVS: ftp: loaded support on port[0] = 21 [ 35.807761] chnl_net:caif_netlink_parms(): no params data found [ 35.866353] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.872962] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.880850] device bridge_slave_0 entered promiscuous mode [ 35.888705] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.895813] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.902801] device bridge_slave_1 entered promiscuous mode [ 35.920515] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 35.929654] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 35.948455] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 35.956230] team0: Port device team_slave_0 added [ 35.961668] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 35.969514] team0: Port device team_slave_1 added [ 35.984943] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 35.991188] 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. [ 36.016525] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 36.027966] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 36.034406] 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. [ 36.059666] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 36.070963] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 36.078617] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 36.097392] device hsr_slave_0 entered promiscuous mode [ 36.103095] device hsr_slave_1 entered promiscuous mode [ 36.109478] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 36.116773] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 36.179954] bridge0: port 2(bridge_slave_1) entered blocking state [ 36.186406] bridge0: port 2(bridge_slave_1) entered forwarding state [ 36.193121] bridge0: port 1(bridge_slave_0) entered blocking state [ 36.199497] bridge0: port 1(bridge_slave_0) entered forwarding state [ 36.230641] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 36.237918] 8021q: adding VLAN 0 to HW filter on device bond0 [ 36.247055] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 36.255857] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 36.264552] bridge0: port 1(bridge_slave_0) entered disabled state [ 36.271663] bridge0: port 2(bridge_slave_1) entered disabled state [ 36.279072] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 36.289183] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 36.295515] 8021q: adding VLAN 0 to HW filter on device team0 [ 36.305015] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 36.312584] bridge0: port 1(bridge_slave_0) entered blocking state [ 36.318995] bridge0: port 1(bridge_slave_0) entered forwarding state [ 36.328986] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 36.337305] bridge0: port 2(bridge_slave_1) entered blocking state [ 36.343710] bridge0: port 2(bridge_slave_1) entered forwarding state [ 36.358695] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 36.366398] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 36.377555] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 36.389497] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 36.399829] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 36.410569] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 36.417360] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 36.425533] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 36.432975] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 36.446065] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 36.453488] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 36.460513] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 36.470405] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 36.484471] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 36.494678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 36.527794] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 36.535194] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 36.541700] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 36.551532] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 36.560030] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 36.567202] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 36.577239] device veth0_vlan entered promiscuous mode [ 36.586202] device veth1_vlan entered promiscuous mode [ 36.592063] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 36.601494] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 36.612250] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 36.621941] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 36.629214] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 36.636686] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 36.646251] device veth0_macvtap entered promiscuous mode [ 36.652587] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 36.661071] device veth1_macvtap entered promiscuous mode [ 36.669649] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 36.679229] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 36.689224] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 36.696302] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 36.704674] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 36.714953] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 36.721694] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 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 [ 36.938324] ------------[ cut here ]------------ [ 36.943344] hsr_addr_subst_dest: Unknown node [ 36.948272] WARNING: CPU: 0 PID: 8411 at net/hsr/hsr_framereg.c:313 hsr_addr_subst_dest+0x3ae/0x450 [ 36.957444] Kernel panic - not syncing: panic_on_warn set ... [ 36.957444] [ 36.964800] CPU: 0 PID: 8411 Comm: syz-executor402 Not tainted 4.19.169-syzkaller #0 [ 36.972659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.981986] Call Trace: [ 36.984560] dump_stack+0x1fc/0x2ef [ 36.988169] panic+0x26a/0x50e [ 36.991350] ? __warn_printk+0xf3/0xf3 [ 36.995223] ? hsr_addr_subst_dest+0x3ae/0x450 [ 36.999787] ? __probe_kernel_read+0x130/0x1b0 [ 37.004356] ? __warn.cold+0x5/0x5a [ 37.007961] ? __warn+0xe4/0x200 [ 37.011310] ? hsr_addr_subst_dest+0x3ae/0x450 [ 37.015871] __warn.cold+0x20/0x5a [ 37.019395] ? hsr_addr_subst_dest+0x3ae/0x450 [ 37.023959] report_bug+0x262/0x2b0 [ 37.027566] do_error_trap+0x1d7/0x310 [ 37.031434] ? math_error+0x310/0x310 [ 37.035220] ? irq_work_claim+0xa6/0xc0 [ 37.039185] ? irq_work_queue+0x29/0x80 [ 37.043140] ? error_entry+0x72/0xd0 [ 37.046921] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.051920] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.056752] invalid_op+0x14/0x20 [ 37.060190] RIP: 0010:hsr_addr_subst_dest+0x3ae/0x450 [ 37.065357] Code: d1 7a f9 84 db 0f 85 49 fd ff ff e8 4c d0 7a f9 48 c7 c6 60 4c 70 89 48 c7 c7 20 4c 70 89 c6 05 46 fd 26 03 01 e8 12 0d 08 00 <0f> 0b e9 23 fd ff ff e8 f6 84 b0 f9 e9 c2 fd ff ff 48 89 ef e8 79 [ 37.084239] RSP: 0018:ffff88809ebe77a0 EFLAGS: 00010282 [ 37.089713] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 37.097043] RDX: 0000000000000000 RSI: ffffffff814de1b1 RDI: ffffed1013d7cee6 [ 37.104300] RBP: ffff88809bc9ed42 R08: 0000000000000001 R09: 0000000000000000 [ 37.111570] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000085830a48 [ 37.118824] R13: ffff8880af714d60 R14: 00000000d60ff9ff R15: 000000000000a943 [ 37.126093] ? vprintk_func+0x81/0x180 [ 37.129973] hsr_forward_skb+0x1284/0x1c30 [ 37.134229] hsr_dev_xmit+0x6b/0xa0 [ 37.137844] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.142865] dev_hard_start_xmit+0x1a8/0x920 [ 37.147267] __dev_queue_xmit+0x269d/0x2e00 [ 37.151573] ? copyin+0xa4/0xf0 [ 37.154835] ? netdev_pick_tx+0x2f0/0x2f0 [ 37.158981] ? _copy_from_iter+0x30e/0xb80 [ 37.163213] ? skb_copy_datagram_from_iter+0x45f/0x680 [ 37.168475] packet_sendmsg+0x2474/0x6b00 [ 37.172605] ? rate_limit_us_store+0x130/0x180 [ 37.177166] ? __lock_acquire+0x660/0x3ff0 [ 37.181387] ? aa_sk_perm+0x534/0x930 [ 37.185168] ? compat_packet_setsockopt+0x160/0x160 [ 37.190166] ? aa_af_perm+0x230/0x230 [ 37.193953] ? compat_packet_setsockopt+0x160/0x160 [ 37.198951] sock_sendmsg+0xc3/0x120 [ 37.202651] __sys_sendto+0x21a/0x320 [ 37.206434] ? __ia32_sys_getpeername+0xb0/0xb0 [ 37.211087] ? __sys_getsockname+0x155/0x1f0 [ 37.215473] ? __ia32_sys_connect+0xb0/0xb0 [ 37.219777] ? __sys_sendmsg+0x1b0/0x1b0 [ 37.223829] __x64_sys_sendto+0xdd/0x1b0 [ 37.227873] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.232434] do_syscall_64+0xf9/0x620 [ 37.236217] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.241385] RIP: 0033:0x443fb9 [ 37.244558] Code: e8 6c 05 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 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.263438] RSP: 002b:00007ffddb706f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 37.271123] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443fb9 [ 37.278369] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000004 [ 37.285620] RBP: 00007ffddb706f20 R08: 00000000200002c0 R09: 0000000000000014 [ 37.292880] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009048 [ 37.300128] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.308348] Kernel Offset: disabled [ 37.312012] Rebooting in 86400 seconds..