[ 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 '10.128.1.30' (ECDSA) to the list of known hosts. syzkaller login: [ 46.580163] audit: type=1400 audit(1598654715.998:8): avc: denied { execmem } for pid=6355 comm="syz-executor523" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 47.722938] IPVS: ftp: loaded support on port[0] = 21 [ 47.796823] chnl_net:caif_netlink_parms(): no params data found [ 47.862068] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.868768] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.876942] device bridge_slave_0 entered promiscuous mode [ 47.884423] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.891328] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.898162] device bridge_slave_1 entered promiscuous mode [ 47.914872] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 47.923687] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 47.941921] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 47.949110] team0: Port device team_slave_0 added [ 47.955217] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 47.962691] team0: Port device team_slave_1 added [ 47.977335] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 47.983659] 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. [ 48.009778] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 48.021541] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 48.027766] 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. [ 48.053755] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 48.064592] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 48.072347] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 48.090271] device hsr_slave_0 entered promiscuous mode [ 48.095932] device hsr_slave_1 entered promiscuous mode [ 48.102404] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 48.109332] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 48.168741] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.175164] bridge0: port 2(bridge_slave_1) entered forwarding state [ 48.182048] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.188417] bridge0: port 1(bridge_slave_0) entered forwarding state [ 48.217079] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 48.224569] 8021q: adding VLAN 0 to HW filter on device bond0 [ 48.232898] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.241516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.259656] bridge0: port 1(bridge_slave_0) entered disabled state [ 48.266738] bridge0: port 2(bridge_slave_1) entered disabled state [ 48.276701] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 48.283052] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.291264] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 48.298787] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.305182] bridge0: port 1(bridge_slave_0) entered forwarding state [ 48.313969] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 48.322662] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.328981] bridge0: port 2(bridge_slave_1) entered forwarding state [ 48.346953] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 48.356906] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 48.368294] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 48.376041] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 48.383883] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 48.392053] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 48.399563] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 48.407107] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 48.413975] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 48.425172] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 48.433295] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 48.439927] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 48.449980] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 48.498944] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 48.508882] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 48.534740] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 48.542245] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 48.548618] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 48.557710] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 48.565301] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 48.572884] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 48.582629] device veth0_vlan entered promiscuous mode [ 48.592427] device veth1_vlan entered promiscuous mode [ 48.598197] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 48.607168] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 48.617698] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 48.626918] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 48.634459] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 48.642033] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 48.651832] device veth0_macvtap entered promiscuous mode [ 48.657803] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 48.666338] device veth1_macvtap entered promiscuous mode [ 48.674631] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 48.684131] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 48.693738] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 48.701166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 48.709125] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 48.718822] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 48.726183] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program executing program [ 48.781476] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready executing program [ 48.844701] kasan: CONFIG_KASAN_INLINE enabled [ 48.849414] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.856816] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.863034] Modules linked in: [ 48.866208] CPU: 0 PID: 6614 Comm: syz-executor523 Not tainted 4.14.195-syzkaller #0 [ 48.874063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.883395] task: ffff888094a704c0 task.stack: ffff888094828000 [ 48.889449] RIP: 0010:fq_codel_enqueue+0x7ce/0xfc0 [ 48.894360] RSP: 0018:ffff88809482f790 EFLAGS: 00010246 [ 48.899697] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 48.906950] RDX: 0000000000000000 RSI: ffff88809b47b8e8 RDI: ffff88809b47b8a8 [ 48.914199] RBP: ffff88809b47b6c0 R08: ffff88821fff7018 R09: ffff88821fff700f [ 48.921445] R10: ffff88821fff7017 R11: 0000000c9c749bdd R12: ffff88809482f908 [ 48.928692] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888080840500 [ 48.935951] FS: 00007f4dbae8c700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 48.944262] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.950126] CR2: 00000000200001c0 CR3: 000000008fe14000 CR4: 00000000001406f0 [ 48.957375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.964621] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.971870] Call Trace: [ 48.974442] ? __dev_queue_xmit+0x1108/0x2480 [ 48.978912] ? fq_codel_walk+0x2a0/0x2a0 [ 48.982949] __dev_queue_xmit+0x121d/0x2480 [ 48.987247] ? __netlink_lookup+0x345/0x5d0 [ 48.991541] ? netdev_pick_tx+0x2e0/0x2e0 [ 48.995667] ? skb_clone+0x126/0x9a0 [ 48.999355] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 49.004778] ? memcpy+0x35/0x50 [ 49.008028] ? memcpy+0x35/0x50 [ 49.011296] ? skb_clone+0x6ac/0x9a0 [ 49.015006] netlink_deliver_tap+0x60c/0x7d0 [ 49.019392] netlink_unicast+0x485/0x610 [ 49.023427] ? netlink_sendskb+0xd0/0xd0 [ 49.027459] netlink_sendmsg+0x62e/0xb80 [ 49.031496] ? nlmsg_notify+0x170/0x170 [ 49.035444] ? kernel_recvmsg+0x210/0x210 [ 49.039563] ? security_socket_sendmsg+0x83/0xb0 [ 49.044292] ? nlmsg_notify+0x170/0x170 [ 49.048240] sock_sendmsg+0xb5/0x100 [ 49.051930] ___sys_sendmsg+0x6c8/0x800 [ 49.055884] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 49.060615] ? __fget+0x1fe/0x360 [ 49.064044] ? lock_acquire+0x170/0x3f0 [ 49.067990] ? lock_downgrade+0x740/0x740 [ 49.072113] ? __fget+0x225/0x360 [ 49.075540] ? __fdget+0x196/0x1f0 [ 49.079053] ? sockfd_lookup_light+0xb2/0x160 [ 49.083522] __sys_sendmsg+0xa3/0x120 [ 49.087295] ? SyS_shutdown+0x160/0x160 [ 49.091246] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 49.096244] ? _raw_spin_unlock_irq+0x5a/0x80 [ 49.100828] SyS_sendmsg+0x27/0x40 [ 49.104344] ? __sys_sendmsg+0x120/0x120 [ 49.108381] do_syscall_64+0x1d5/0x640 [ 49.112243] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 49.117455] RIP: 0033:0x44a179 [ 49.120648] RSP: 002b:00007f4dbae8bdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 49.128332] RAX: ffffffffffffffda RBX: 00000000006dfc58 RCX: 000000000044a179 [ 49.135594] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 49.142838] RBP: 00000000006dfc50 R08: 00007f4dbae8c700 R09: 0000000000000000 [ 49.150084] R10: 00007f4dbae8c700 R11: 0000000000000246 R12: 00000000006dfc5c [ 49.157329] R13: 00007ffc7635104f R14: 00007f4dbae8c9c0 R15: 00000000006dfc5c [ 49.164576] Code: a9 43 2f fc 3b 6c 24 08 0f 83 bb 00 00 00 e8 9a 43 2f fc 48 8b 44 24 10 80 38 00 0f 85 05 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 d9 05 00 00 48 8b 10 48 8d 78 28 49 89 17 [ 49.183681] RIP: fq_codel_enqueue+0x7ce/0xfc0 RSP: ffff88809482f790 [ 49.190111] ---[ end trace 4806baa93fce454a ]--- [ 49.194849] Kernel panic - not syncing: Fatal exception in interrupt [ 49.202667] Kernel Offset: disabled [ 49.206278] Rebooting in 86400 seconds..