[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.438114][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 85.438127][ T27] audit: type=1800 audit(1579613958.572:29): pid=9963 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 85.465671][ T27] audit: type=1800 audit(1579613958.572:30): pid=9963 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.139' (ECDSA) to the list of known hosts. 2020/01/21 13:39:26 parsed 1 programs 2020/01/21 13:39:28 executed programs: 0 syzkaller login: [ 95.478358][T10132] IPVS: ftp: loaded support on port[0] = 21 [ 95.539502][T10132] chnl_net:caif_netlink_parms(): no params data found [ 95.572032][T10132] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.579933][T10132] bridge0: port 1(bridge_slave_0) entered disabled state [ 95.588286][T10132] device bridge_slave_0 entered promiscuous mode [ 95.596951][T10132] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.604418][T10132] bridge0: port 2(bridge_slave_1) entered disabled state [ 95.612273][T10132] device bridge_slave_1 entered promiscuous mode [ 95.631030][T10132] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 95.642137][T10132] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 95.662519][T10132] team0: Port device team_slave_0 added [ 95.670239][T10132] team0: Port device team_slave_1 added [ 95.687157][T10132] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 95.694290][T10132] 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. [ 95.720993][T10132] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 95.734323][T10132] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 95.741445][T10132] 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. [ 95.767863][T10132] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 95.845977][T10132] device hsr_slave_0 entered promiscuous mode [ 95.883846][T10132] device hsr_slave_1 entered promiscuous mode [ 95.991970][T10132] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 96.067373][T10132] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 96.126159][T10132] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 96.186276][T10132] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 96.237544][T10132] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.244972][T10132] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.252824][T10132] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.260558][T10132] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.307034][T10132] 8021q: adding VLAN 0 to HW filter on device bond0 [ 96.325819][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 96.336804][ T2762] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.346079][ T2762] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.355391][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 96.369025][T10132] 8021q: adding VLAN 0 to HW filter on device team0 [ 96.380446][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 96.389284][ T2789] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.397076][ T2789] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.409251][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 96.419170][ T2762] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.427606][ T2762] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.449385][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 96.458881][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 96.471723][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 96.490672][T10132] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 96.503127][T10132] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 96.515976][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 96.525615][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 96.534973][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 96.553842][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 96.561443][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 96.578116][T10132] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 96.598316][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 96.607524][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 96.628887][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 96.638401][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 96.647851][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 96.656461][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 96.666178][T10132] device veth0_vlan entered promiscuous mode [ 96.678746][T10132] device veth1_vlan entered promiscuous mode [ 96.700830][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 96.709993][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 96.718435][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 96.727378][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 96.739975][T10132] device veth0_macvtap entered promiscuous mode [ 96.750785][T10132] device veth1_macvtap entered promiscuous mode [ 96.768201][T10132] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 96.776635][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 96.786008][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 96.794660][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 96.803747][ T2762] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 96.815144][T10132] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 96.823796][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 96.832419][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 96.942119][T10136] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 96.952197][T10136] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.018155][T10137] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.027318][T10137] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.038175][T10137] A link change request failed with some changes committed already. Interface tunl0 may have been left with an inconsistent configuration, please check. [ 97.079614][T10140] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.088469][T10140] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.136924][T10140] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.146447][T10140] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.155737][T10140] A link change request failed with some changes committed already. Interface tunl0 may have been left with an inconsistent configuration, please check. [ 97.194158][T10145] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.202893][T10145] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.246799][T10145] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.256363][T10145] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.265597][T10145] A link change request failed with some changes committed already. Interface tunl0 may have been left with an inconsistent configuration, please check. [ 97.302229][T10150] netlink: 'syz-executor.0': attribute type 1 has an invalid length. [ 97.311177][T10150] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.357725][T10152] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.405477][T10156] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 97.478313][T10157] A link change request failed with some changes committed already. Interface tunl0 may have been left with an inconsistent configuration, please check. [ 98.229414][T10201] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready [ 98.239170][T10201] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 98.246751][T10201] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 98.300871][T10204] BUG: unable to handle page fault for address: ffff887f978c1fff [ 98.308626][T10204] #PF: supervisor read access in kernel mode [ 98.314622][T10204] #PF: error_code(0x0000) - not-present page [ 98.320602][T10204] PGD 0 P4D 0 [ 98.324040][T10204] Oops: 0000 [#1] PREEMPT SMP KASAN [ 98.329220][T10204] CPU: 0 PID: 10204 Comm: syz-executor.0 Not tainted 5.5.0-rc7-syzkaller #0 [ 98.338045][T10204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.348184][T10204] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 98.354326][T10204] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 9e 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 98.374021][T10204] RSP: 0018:ffffc90001077770 EFLAGS: 00010246 [ 98.380072][T10204] RAX: dffffc0000000000 RBX: ffff8880978b2000 RCX: ffffffff0000feff [ 98.388166][T10204] RDX: 1ffff10ff2f183ff RSI: ffff8880a897f130 RDI: 0000000000000005 [ 98.396129][T10204] RBP: ffffc900010778b0 R08: ffff888091e62100 R09: ffffed1012f1645d [ 98.404089][T10204] R10: ffffed1012f1645c R11: ffff8880978b22e3 R12: ffff887f978c1fff [ 98.412281][T10204] R13: 0000000000000100 R14: ffff8880978c1fff R15: ffff8880a897f0c0 [ 98.420421][T10204] FS: 00007f7fe9964700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.429342][T10204] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.436031][T10204] CR2: ffff887f978c1fff CR3: 0000000091393000 CR4: 00000000001406f0 [ 98.444137][T10204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.452318][T10204] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.460722][T10204] Call Trace: [ 98.464120][T10204] ? generic_xdp_tx+0x740/0x740 [ 98.468968][T10204] ? rcu_read_lock_held+0x9c/0xb0 [ 98.474085][T10204] do_xdp_generic+0x30/0x50 [ 98.478583][T10204] tun_get_user+0x2bcd/0x3fc0 [ 98.483253][T10204] ? __kasan_check_read+0x11/0x20 [ 98.489085][T10204] ? aa_file_perm+0x617/0x1600 [ 98.493843][T10204] ? tun_build_skb.isra.0+0x1470/0x1470 [ 98.499495][T10204] ? rcu_read_lock_held+0x9c/0xb0 [ 98.504528][T10204] ? __kasan_check_read+0x11/0x20 [ 98.509756][T10204] tun_chr_write_iter+0xbd/0x156 [ 98.514813][T10204] do_iter_readv_writev+0x5f8/0x8f0 [ 98.520028][T10204] ? no_seek_end_llseek_size+0x70/0x70 [ 98.525596][T10204] ? apparmor_file_permission+0x27/0x30 [ 98.531143][T10204] ? rw_verify_area+0x126/0x360 [ 98.535981][T10204] do_iter_write+0x184/0x610 [ 98.540701][T10204] ? dup_iter+0x260/0x260 [ 98.545046][T10204] vfs_writev+0x1b3/0x2f0 [ 98.549380][T10204] ? vfs_iter_write+0xb0/0xb0 [ 98.554083][T10204] ? __kasan_check_read+0x11/0x20 [ 98.559129][T10204] ? ksys_dup3+0x3e0/0x3e0 [ 98.563548][T10204] ? __kasan_check_read+0x11/0x20 [ 98.568571][T10204] ? __fget_light+0x1a9/0x230 [ 98.573251][T10204] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.579494][T10204] do_writev+0x15b/0x330 [ 98.583725][T10204] ? vfs_writev+0x2f0/0x2f0 [ 98.588280][T10204] ? do_syscall_64+0x26/0x790 [ 98.592957][T10204] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.599027][T10204] ? do_syscall_64+0x26/0x790 [ 98.603825][T10204] __x64_sys_writev+0x75/0xb0 [ 98.608498][T10204] do_syscall_64+0xfa/0x790 [ 98.613048][T10204] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.618922][T10204] RIP: 0033:0x45b201 [ 98.622827][T10204] Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b7 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 [ 98.643382][T10204] RSP: 002b:00007f7fe9963ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 [ 98.651811][T10204] RAX: ffffffffffffffda RBX: 000000000000005e RCX: 000000000045b201 [ 98.659799][T10204] RDX: 0000000000000001 RSI: 00007f7fe9963c00 RDI: 00000000000000f0 [ 98.667791][T10204] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 [ 98.675816][T10204] R10: 00000000000000a8 R11: 0000000000000293 R12: 00000000ffffffff [ 98.683866][T10204] R13: 0000000000000b4c R14: 00000000004cc318 R15: 000000000075bf2c [ 98.691979][T10204] Modules linked in: [ 98.695866][T10204] CR2: ffff887f978c1fff [ 98.700015][T10204] ---[ end trace dd0b362dc4b7e77b ]--- [ 98.705484][T10204] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 98.711671][T10204] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 9e 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 98.731880][T10204] RSP: 0018:ffffc90001077770 EFLAGS: 00010246 [ 98.738075][T10204] RAX: dffffc0000000000 RBX: ffff8880978b2000 RCX: ffffffff0000feff [ 98.749487][T10204] RDX: 1ffff10ff2f183ff RSI: ffff8880a897f130 RDI: 0000000000000005 [ 98.759867][T10204] RBP: ffffc900010778b0 R08: ffff888091e62100 R09: ffffed1012f1645d [ 98.767889][T10204] R10: ffffed1012f1645c R11: ffff8880978b22e3 R12: ffff887f978c1fff [ 98.775914][T10204] R13: 0000000000000100 R14: ffff8880978c1fff R15: ffff8880a897f0c0 [ 98.783952][T10204] FS: 00007f7fe9964700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.793034][T10204] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.799618][T10204] CR2: ffff887f978c1fff CR3: 0000000091393000 CR4: 00000000001406f0 [ 98.807581][T10204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.815548][T10204] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.823515][T10204] Kernel panic - not syncing: Fatal exception in interrupt [ 98.831665][T10204] Kernel Offset: disabled [ 98.836008][T10204] Rebooting in 86400 seconds..