[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 94.077412][ T27] audit: type=1400 audit(1584053105.912:37): avc: denied { watch } for pid=10728 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 98.486779][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 98.486793][ T27] audit: type=1400 audit(1584053110.322:41): avc: denied { map } for pid=10806 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts. [ 105.483211][ T27] audit: type=1400 audit(1584053117.312:42): avc: denied { map } for pid=10818 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2020/03/12 22:45:17 parsed 1 programs [ 107.467392][ T27] audit: type=1400 audit(1584053119.302:43): avc: denied { integrity } for pid=10818 comm="syz-execprog" lockdown_reason="debugfs access" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=lockdown permissive=1 [ 107.494479][ T27] audit: type=1400 audit(1584053119.302:44): avc: denied { map } for pid=10818 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=1103 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 2020/03/12 22:45:19 executed programs: 0 [ 107.722679][T10835] IPVS: ftp: loaded support on port[0] = 21 [ 107.787656][T10835] chnl_net:caif_netlink_parms(): no params data found [ 107.829672][T10835] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.837826][T10835] bridge0: port 1(bridge_slave_0) entered disabled state [ 107.846227][T10835] device bridge_slave_0 entered promiscuous mode [ 107.855620][T10835] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.862717][T10835] bridge0: port 2(bridge_slave_1) entered disabled state [ 107.870628][T10835] device bridge_slave_1 entered promiscuous mode [ 107.889658][T10835] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 107.901536][T10835] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 107.922522][T10835] team0: Port device team_slave_0 added [ 107.930387][T10835] team0: Port device team_slave_1 added [ 107.947404][T10835] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 107.954445][T10835] 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. [ 107.981337][T10835] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 107.994471][T10835] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 108.001483][T10835] 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. [ 108.027402][T10835] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 108.097380][T10835] device hsr_slave_0 entered promiscuous mode [ 108.155361][T10835] device hsr_slave_1 entered promiscuous mode [ 108.299268][ T27] audit: type=1400 audit(1584053120.132:45): avc: denied { create } for pid=10835 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 108.327051][ T27] audit: type=1400 audit(1584053120.162:46): avc: denied { write } for pid=10835 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 108.329523][T10835] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 108.352173][ T27] audit: type=1400 audit(1584053120.162:47): avc: denied { read } for pid=10835 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 108.418804][T10835] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 108.478219][T10835] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 108.558180][T10835] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 108.634180][T10835] bridge0: port 2(bridge_slave_1) entered blocking state [ 108.641388][T10835] bridge0: port 2(bridge_slave_1) entered forwarding state [ 108.649273][T10835] bridge0: port 1(bridge_slave_0) entered blocking state [ 108.656401][T10835] bridge0: port 1(bridge_slave_0) entered forwarding state [ 108.712738][T10835] 8021q: adding VLAN 0 to HW filter on device bond0 [ 108.729013][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 108.740324][ T3201] bridge0: port 1(bridge_slave_0) entered disabled state [ 108.748974][ T3201] bridge0: port 2(bridge_slave_1) entered disabled state [ 108.757458][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 108.772423][T10835] 8021q: adding VLAN 0 to HW filter on device team0 [ 108.786240][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 108.796308][ T2693] bridge0: port 1(bridge_slave_0) entered blocking state [ 108.803395][ T2693] bridge0: port 1(bridge_slave_0) entered forwarding state [ 108.816211][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 108.824800][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 108.834169][ T3201] bridge0: port 2(bridge_slave_1) entered blocking state [ 108.841410][ T3201] bridge0: port 2(bridge_slave_1) entered forwarding state [ 108.865279][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 108.874098][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 108.883034][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 108.891831][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 108.901712][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 108.911512][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 108.921462][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 108.934081][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 108.942991][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 108.956799][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 108.966281][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 108.979442][T10835] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 109.001502][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 109.009820][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 109.023935][T10835] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 109.047492][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 109.057264][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 109.080044][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 109.088930][ T2693] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 109.099242][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 109.107717][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 109.118364][T10835] device veth0_vlan entered promiscuous mode [ 109.131991][T10835] device veth1_vlan entered promiscuous mode [ 109.158863][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 109.167454][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 109.176526][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 109.184918][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 109.198085][T10835] device veth0_macvtap entered promiscuous mode [ 109.209764][T10835] device veth1_macvtap entered promiscuous mode [ 109.229131][T10835] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 109.236637][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 109.245632][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 109.253680][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 109.262971][ T2694] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 109.276794][T10835] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 109.284068][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 109.293771][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 109.493947][ T27] audit: type=1400 audit(1584053121.322:48): avc: denied { associate } for pid=10835 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 109.623514][T10843] ------------[ cut here ]------------ [ 109.629304][T10843] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 109.639495][T10843] WARNING: CPU: 1 PID: 10843 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 109.649120][T10843] Kernel panic - not syncing: panic_on_warn set ... [ 109.655701][T10843] CPU: 1 PID: 10843 Comm: syz-executor.0 Not tainted 5.6.0-rc5-syzkaller #0 [ 109.664391][T10843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 109.674433][T10843] Call Trace: [ 109.677715][T10843] dump_stack+0x188/0x20d [ 109.682034][T10843] ? debug_print_object+0x140/0x250 [ 109.687258][T10843] panic+0x2e3/0x75c [ 109.691171][T10843] ? add_taint.cold+0x16/0x16 [ 109.695855][T10843] ? __probe_kernel_read+0x188/0x1d0 [ 109.701132][T10843] ? __warn.cold+0x14/0x35 [ 109.705616][T10843] ? __warn+0xd5/0x1c8 [ 109.709668][T10843] ? debug_print_object+0x160/0x250 [ 109.714847][T10843] __warn.cold+0x2f/0x35 [ 109.719087][T10843] ? debug_print_object+0x160/0x250 [ 109.724267][T10843] report_bug+0x27b/0x2f0 [ 109.728598][T10843] do_error_trap+0x12b/0x220 [ 109.733193][T10843] ? debug_print_object+0x160/0x250 [ 109.738395][T10843] do_invalid_op+0x32/0x40 [ 109.743255][T10843] ? debug_print_object+0x160/0x250 [ 109.748452][T10843] invalid_op+0x23/0x30 [ 109.752610][T10843] RIP: 0010:debug_print_object+0x160/0x250 [ 109.758406][T10843] Code: dd c0 f3 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 f3 51 88 48 c7 c7 20 e9 51 88 e8 f8 d6 b1 fd <0f> 0b 83 05 0b b5 d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 109.778005][T10843] RSP: 0018:ffffc90002207178 EFLAGS: 00010282 [ 109.784056][T10843] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 109.792021][T10843] RDX: 0000000000000000 RSI: ffffffff815bf511 RDI: fffff52000440e21 [ 109.799987][T10843] RBP: 0000000000000001 R08: ffff88809eb7e080 R09: ffffed1015ce6659 [ 109.807956][T10843] R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: ffffffff897acba0 [ 109.815919][T10843] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000440e3c [ 109.824046][T10843] ? vprintk_func+0x81/0x17e [ 109.828664][T10843] ? debug_print_object+0x160/0x250 [ 109.833851][T10843] ? lockdep_hardirqs_on+0x417/0x5d0 [ 109.839213][T10843] debug_object_activate+0x346/0x470 [ 109.844487][T10843] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 109.850313][T10843] ? debug_object_init_on_stack+0x20/0x20 [ 109.856030][T10843] ? find_held_lock+0x2d/0x110 [ 109.860790][T10843] ? free_object+0x70/0x70 [ 109.865485][T10843] ? lock_downgrade+0x7f0/0x7f0 [ 109.870331][T10843] ? delayed_work_timer_fn+0x90/0x90 [ 109.875613][T10843] call_rcu+0x2c/0x690 [ 109.879681][T10843] queue_rcu_work+0x82/0xa0 [ 109.884169][T10843] route4_change+0x19e8/0x2250 [ 109.888921][T10843] ? route4_destroy+0x800/0x800 [ 109.893765][T10843] ? wait_for_completion+0x3c0/0x3c0 [ 109.899037][T10843] tc_new_tfilter+0xa59/0x20b0 [ 109.903820][T10843] ? route4_destroy+0x800/0x800 [ 109.908683][T10843] ? tc_del_tfilter+0x1430/0x1430 [ 109.913714][T10843] ? __lock_acquire+0x80b/0x3ca0 [ 109.918683][T10843] ? rcu_read_lock_held+0x9c/0xb0 [ 109.923739][T10843] ? tc_del_tfilter+0x1430/0x1430 [ 109.928757][T10843] rtnetlink_rcv_msg+0x810/0xad0 [ 109.933695][T10843] ? rtnl_bridge_getlink+0x880/0x880 [ 109.938973][T10843] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 109.944250][T10843] ? __copy_skb_header+0x210/0x5b0 [ 109.949366][T10843] ? skb_splice_bits+0x1a0/0x1a0 [ 109.954312][T10843] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 109.960126][T10843] ? kmem_cache_alloc+0x261/0x730 [ 109.965146][T10843] netlink_rcv_skb+0x15a/0x410 [ 109.970000][T10843] ? rtnl_bridge_getlink+0x880/0x880 [ 109.975297][T10843] ? netlink_ack+0xa80/0xa80 [ 109.979899][T10843] netlink_unicast+0x537/0x740 [ 109.984656][T10843] ? netlink_attachskb+0x810/0x810 [ 109.989775][T10843] ? _copy_from_iter_full+0x25c/0x870 [ 109.995163][T10843] netlink_sendmsg+0x882/0xe10 [ 109.999930][T10843] ? netlink_unicast+0x740/0x740 [ 110.004879][T10843] ? netlink_unicast+0x740/0x740 [ 110.009835][T10843] sock_sendmsg+0xcf/0x120 [ 110.014233][T10843] ____sys_sendmsg+0x6b9/0x7d0 [ 110.019001][T10843] ? kernel_sendmsg+0x50/0x50 [ 110.023664][T10843] ? mark_lock+0xbc/0x1220 [ 110.028093][T10843] ___sys_sendmsg+0x100/0x170 [ 110.032759][T10843] ? sendmsg_copy_msghdr+0x70/0x70 [ 110.037870][T10843] ? __fget_files+0x329/0x4f0 [ 110.042538][T10843] ? ksys_dup3+0x3c0/0x3c0 [ 110.046939][T10843] ? lock_acquire+0x197/0x420 [ 110.051612][T10843] ? __might_fault+0xef/0x1d0 [ 110.056308][T10843] ? __fget_light+0x208/0x270 [ 110.061004][T10843] __sys_sendmsg+0xec/0x1b0 [ 110.065528][T10843] ? __sys_sendmsg_sock+0xb0/0xb0 [ 110.070542][T10843] ? __x64_sys_futex+0x380/0x4f0 [ 110.075494][T10843] ? trace_hardirqs_off_caller+0x55/0x230 [ 110.081223][T10843] ? do_syscall_64+0x21/0x7d0 [ 110.085907][T10843] do_syscall_64+0xf6/0x7d0 [ 110.090409][T10843] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 110.096290][T10843] RIP: 0033:0x45c679 [ 110.100168][T10843] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 110.119774][T10843] RSP: 002b:00007f5293ec0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 110.128190][T10843] RAX: ffffffffffffffda RBX: 00007f5293ec16d4 RCX: 000000000045c679 [ 110.136165][T10843] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000007 [ 110.144414][T10843] RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 110.152376][T10843] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 110.160350][T10843] R13: 00000000000009fa R14: 00000000004cc948 R15: 000000000076bfac [ 110.169562][T10843] Kernel Offset: disabled [ 110.173971][T10843] Rebooting in 86400 seconds..