[ 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 '10.128.0.40' (ECDSA) to the list of known hosts. syzkaller login: [ 27.872193] IPVS: ftp: loaded support on port[0] = 21 [ 27.939153] chnl_net:caif_netlink_parms(): no params data found [ 28.023831] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.030458] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.038019] device bridge_slave_0 entered promiscuous mode [ 28.044762] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.051615] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.058681] device bridge_slave_1 entered promiscuous mode [ 28.074641] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 28.083367] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 28.100906] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 28.108082] team0: Port device team_slave_0 added [ 28.113390] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 28.120808] team0: Port device team_slave_1 added [ 28.135462] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 28.141775] 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. [ 28.166991] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 28.178317] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 28.184541] 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. [ 28.209782] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 28.220308] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 28.227796] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 28.246213] device hsr_slave_0 entered promiscuous mode [ 28.251777] device hsr_slave_1 entered promiscuous mode [ 28.257909] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 28.264913] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 28.324917] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.331360] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.338267] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.344622] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.372613] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 28.379590] 8021q: adding VLAN 0 to HW filter on device bond0 [ 28.388084] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 28.397225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.415546] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.432557] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.442428] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 28.448565] 8021q: adding VLAN 0 to HW filter on device team0 [ 28.457291] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.464861] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.471265] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.486581] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.494234] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.500996] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.508316] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 28.516699] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 28.524641] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 28.540134] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.550189] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 28.560547] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 28.568849] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 28.575931] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.588412] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 28.596604] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.603262] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.613150] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 28.662247] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 28.672067] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.702151] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 28.709268] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 28.716939] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 28.727055] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.734454] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.741719] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.750081] device veth0_vlan entered promiscuous mode [ 28.758605] device veth1_vlan entered promiscuous mode [ 28.764555] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 28.773179] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 28.783434] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 28.792678] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 28.800007] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 28.807446] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.817026] device veth0_macvtap entered promiscuous mode [ 28.823113] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 28.832151] device veth1_macvtap entered promiscuous mode [ 28.840655] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 28.850094] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 28.860203] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 28.867524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.876033] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 28.887050] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 28.896491] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 28.925829] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 28.980972] kasan: CONFIG_KASAN_INLINE enabled [ 28.985897] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.993248] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.999496] Modules linked in: [ 29.002669] CPU: 1 PID: 8182 Comm: syz-executor300 Not tainted 4.14.273-syzkaller #0 [ 29.010523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.019855] task: ffff8880b3a506c0 task.stack: ffff8880b1b40000 [ 29.025892] RIP: 0010:addr_resolve+0x263/0xa10 [ 29.030446] RSP: 0018:ffff8880b1b47860 EFLAGS: 00010202 [ 29.035783] RAX: dffffc0000000000 RBX: ffff8880b347ca60 RCX: 1ffff1101674a1e9 [ 29.043030] RDX: 00000000000000a8 RSI: 0000000000000001 RDI: 0000000000000286 [ 29.050300] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 29.057548] R10: 0000000000000000 R11: ffff8880b3a506c0 R12: 00000000ffffff9d [ 29.064794] R13: ffff8880b3c843d0 R14: ffff8880abb15e40 R15: ffff8880b347cac4 [ 29.072042] FS: 0000555556064300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 29.080242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.086272] CR2: 00007f44310c3160 CR3: 00000000a0184000 CR4: 00000000003406e0 [ 29.093526] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.100776] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.108120] Call Trace: [ 29.110698] ? addr_resolve_neigh+0x800/0x800 [ 29.115264] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.120520] ? init_timer_key+0x68/0x300 [ 29.124566] rdma_resolve_ip+0x40d/0x6b0 [ 29.128612] ? rdma_resolve_addr+0x23b0/0x23b0 [ 29.133182] rdma_resolve_addr+0x2bc/0x23b0 [ 29.137781] ? lock_downgrade+0x740/0x740 [ 29.142053] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 29.147484] ? cma_remove_one+0x7c0/0x7c0 [ 29.151628] ? __radix_tree_lookup+0x1b5/0x2e0 [ 29.156198] ? wait_for_completion_io+0x10/0x10 [ 29.160937] ? __might_fault+0x177/0x1b0 [ 29.164981] ucma_resolve_addr+0x12c/0x1d0 [ 29.169194] ? ucma_query+0x170/0x170 [ 29.172988] ? lock_downgrade+0x740/0x740 [ 29.177117] ? __might_fault+0x177/0x1b0 [ 29.181158] ? _copy_from_user+0x96/0x100 [ 29.185380] ? ucma_query+0x170/0x170 [ 29.189173] ucma_write+0x206/0x2c0 [ 29.192817] ? ucma_set_ib_path+0x510/0x510 [ 29.197129] __vfs_write+0xe4/0x630 [ 29.201178] ? ucma_set_ib_path+0x510/0x510 [ 29.205484] ? __handle_mm_fault+0x80f/0x4620 [ 29.209963] ? kernel_read+0x110/0x110 [ 29.213832] ? common_file_perm+0x3ee/0x580 [ 29.218310] ? __fsnotify_inode_delete+0x20/0x20 [ 29.223065] ? __fsnotify_update_child_dentry_flags.part.0+0x2e0/0x2e0 [ 29.229882] ? security_file_permission+0x82/0x1e0 [ 29.234794] ? rw_verify_area+0xe1/0x2a0 [ 29.238834] vfs_write+0x17f/0x4d0 [ 29.242350] SyS_write+0xf2/0x210 [ 29.245781] ? SyS_read+0x210/0x210 [ 29.249387] ? __do_page_fault+0x159/0xad0 [ 29.253614] ? do_syscall_64+0x4c/0x640 [ 29.257563] ? SyS_read+0x210/0x210 [ 29.261350] do_syscall_64+0x1d5/0x640 [ 29.265233] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.270397] RIP: 0033:0x7f443104bd79 [ 29.274084] RSP: 002b:00007ffc1ed587d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 29.281774] RAX: ffffffffffffffda RBX: 00007ffc1ed58800 RCX: 00007f443104bd79 [ 29.289114] RDX: 0000000000000118 RSI: 0000000020000000 RDI: 0000000000000003 [ 29.296365] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 29.303617] R10: 000000000000000d R11: 0000000000000246 R12: 00007ffc1ed587f0 [ 29.310967] R13: 00000000000f4240 R14: 0000000000000000 R15: 0000000000000000 [ 29.318220] Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 ad 06 00 00 44 89 6b 64 e8 90 cd 0e fc 48 8b 54 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 78 06 00 00 48 8b 85 40 05 00 00 65 ff 08 e8 [ 29.337749] RIP: addr_resolve+0x263/0xa10 RSP: ffff8880b1b47860 [ 29.346506] ---[ end trace 79a42837fdb43637 ]--- [ 29.351285] Kernel panic - not syncing: Fatal exception [ 29.356805] Kernel Offset: disabled [ 29.360419] Rebooting in 86400 seconds..