[ 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 '10.128.0.208' (ECDSA) to the list of known hosts. 2020/08/27 04:47:57 parsed 1 programs 2020/08/27 04:47:57 executed programs: 0 syzkaller login: [ 61.451830][ T6895] IPVS: ftp: loaded support on port[0] = 21 [ 61.627354][ T6895] chnl_net:caif_netlink_parms(): no params data found [ 61.682439][ T6895] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.690081][ T6895] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.699093][ T6895] device bridge_slave_0 entered promiscuous mode [ 61.708539][ T6895] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.715614][ T6895] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.724265][ T6895] device bridge_slave_1 entered promiscuous mode [ 61.744546][ T6895] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.755198][ T6895] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.778666][ T6895] team0: Port device team_slave_0 added [ 61.785774][ T6895] team0: Port device team_slave_1 added [ 61.803032][ T6895] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 61.810032][ T6895] 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. [ 61.837737][ T6895] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 61.850495][ T6895] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 61.857891][ T6895] 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. [ 61.884220][ T6895] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 61.910383][ T6895] device hsr_slave_0 entered promiscuous mode [ 61.917029][ T6895] device hsr_slave_1 entered promiscuous mode [ 62.009175][ T6895] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.020396][ T6895] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.036853][ T6895] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.045606][ T6895] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.069722][ T6895] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.076899][ T6895] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.084447][ T6895] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.091578][ T6895] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.138852][ T6895] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.152128][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.161937][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.170315][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.178650][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 62.191481][ T6895] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.202221][ T2582] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.211197][ T2582] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.218435][ T2582] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.238978][ T7115] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.247858][ T7115] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.254893][ T7115] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.264979][ T7115] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.284279][ T6895] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 62.294912][ T6895] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 62.309037][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.317310][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.325558][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.334860][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.357006][ T6895] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.364957][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.372833][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.380708][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.400065][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.418833][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.428107][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.435753][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.447600][ T6895] device veth0_vlan entered promiscuous mode [ 62.458885][ T6895] device veth1_vlan entered promiscuous mode [ 62.480008][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.488079][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 62.497156][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.508394][ T6895] device veth0_macvtap entered promiscuous mode [ 62.518332][ T6895] device veth1_macvtap entered promiscuous mode [ 62.535506][ T6895] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.542901][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.552900][ T7116] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 62.564468][ T6895] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.572258][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.584438][ T6895] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.594552][ T6895] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.603306][ T6895] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.612048][ T6895] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.863949][ T7133] ------------[ cut here ]------------ [ 62.869455][ T7133] ODEBUG: free active (active state 1) object type: rcu_head hint: 0x0 [ 62.878166][ T7133] WARNING: CPU: 1 PID: 7133 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 62.887609][ T7133] Modules linked in: [ 62.891514][ T7133] CPU: 1 PID: 7133 Comm: syz-executor.0 Not tainted 5.9.0-rc2-next-20200826-syzkaller #0 [ 62.901305][ T7133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.911371][ T7133] RIP: 0010:debug_print_object+0x160/0x250 [ 62.917178][ T7133] Code: dd e0 6f 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd e0 6f 94 88 48 c7 c7 40 65 94 88 e8 ab 69 a4 fd <0f> 0b 83 05 13 04 1b 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 62.936774][ T7133] RSP: 0018:ffffc90006767ba8 EFLAGS: 00010086 [ 62.942844][ T7133] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 62.950800][ T7133] RDX: ffff88808bae2480 RSI: ffffffff815daa77 RDI: fffff52000cecf67 [ 62.958850][ T7133] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720f8b [ 62.966799][ T7133] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89c674c0 [ 62.974761][ T7133] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 62.982712][ T7133] FS: 00007efd95cd3700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 62.991619][ T7133] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.998180][ T7133] CR2: 00007efd95cb1db8 CR3: 000000009434d000 CR4: 00000000001506e0 [ 63.006138][ T7133] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.014185][ T7133] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.022139][ T7133] Call Trace: [ 63.025419][ T7133] debug_check_no_obj_freed+0x301/0x41c [ 63.030997][ T7133] kmem_cache_free.part.0+0x16d/0x1f0 [ 63.036352][ T7133] task_work_run+0xdd/0x190 [ 63.040834][ T7133] get_signal+0xd89/0x1f00 [ 63.045232][ T7133] arch_do_signal+0x82/0x2520 [ 63.049930][ T7133] ? lock_downgrade+0x830/0x830 [ 63.054767][ T7133] ? __ia32_sys_epoll_create+0x1e0/0x1e0 [ 63.060378][ T7133] ? copy_siginfo_to_user32+0xa0/0xa0 [ 63.065730][ T7133] ? ep_unregister_pollwait.constprop.0+0x3c0/0x3c0 [ 63.072318][ T7133] ? __might_fault+0x190/0x1d0 [ 63.077110][ T7133] ? exit_to_user_mode_prepare+0xb9/0x1c0 [ 63.082807][ T7133] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 63.088820][ T7133] exit_to_user_mode_prepare+0x15d/0x1c0 [ 63.094433][ T7133] syscall_exit_to_user_mode+0x59/0x2b0 [ 63.100002][ T7133] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.105910][ T7133] RIP: 0033:0x45d5b9 [ 63.109785][ T7133] Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.129363][ T7133] RSP: 002b:00007efd95cd2c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 63.137751][ T7133] RAX: 0000000000000000 RBX: 0000000000002ac0 RCX: 000000000045d5b9 [ 63.145700][ T7133] RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000006 [ 63.153649][ T7133] RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 [ 63.161597][ T7133] R10: 0000000020000000 R11: 0000000000000246 R12: 000000000118cf4c [ 63.169548][ T7133] R13: 00007ffca6b68abf R14: 00007efd95cd39c0 R15: 000000000118cf4c [ 63.177506][ T7133] Kernel panic - not syncing: panic_on_warn set ... [ 63.184086][ T7133] CPU: 1 PID: 7133 Comm: syz-executor.0 Not tainted 5.9.0-rc2-next-20200826-syzkaller #0 [ 63.193887][ T7133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.203920][ T7133] Call Trace: [ 63.207192][ T7133] dump_stack+0x18f/0x20d [ 63.211500][ T7133] panic+0x2e3/0x75c [ 63.215374][ T7133] ? __warn_printk+0xf3/0xf3 [ 63.219945][ T7133] ? __warn.cold+0x1d/0xc1 [ 63.224353][ T7133] ? __warn.cold+0x14/0xc1 [ 63.228757][ T7133] ? debug_print_object+0x160/0x250 [ 63.233986][ T7133] __warn.cold+0x38/0xc1 [ 63.238224][ T7133] ? debug_print_object+0x160/0x250 [ 63.243397][ T7133] report_bug+0x1bd/0x210 [ 63.247711][ T7133] handle_bug+0x38/0x90 [ 63.251848][ T7133] exc_invalid_op+0x14/0x40 [ 63.256328][ T7133] asm_exc_invalid_op+0x12/0x20 [ 63.261161][ T7133] RIP: 0010:debug_print_object+0x160/0x250 [ 63.266943][ T7133] Code: dd e0 6f 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd e0 6f 94 88 48 c7 c7 40 65 94 88 e8 ab 69 a4 fd <0f> 0b 83 05 13 04 1b 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 63.286528][ T7133] RSP: 0018:ffffc90006767ba8 EFLAGS: 00010086 [ 63.292614][ T7133] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 63.300563][ T7133] RDX: ffff88808bae2480 RSI: ffffffff815daa77 RDI: fffff52000cecf67 [ 63.308554][ T7133] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720f8b [ 63.316538][ T7133] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89c674c0 [ 63.324486][ T7133] R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000 [ 63.332470][ T7133] ? vprintk_func+0x97/0x1a6 [ 63.337042][ T7133] ? debug_print_object+0x160/0x250 [ 63.342220][ T7133] debug_check_no_obj_freed+0x301/0x41c [ 63.347761][ T7133] kmem_cache_free.part.0+0x16d/0x1f0 [ 63.353108][ T7133] task_work_run+0xdd/0x190 [ 63.357591][ T7133] get_signal+0xd89/0x1f00 [ 63.361992][ T7133] arch_do_signal+0x82/0x2520 [ 63.366648][ T7133] ? lock_downgrade+0x830/0x830 [ 63.371479][ T7133] ? __ia32_sys_epoll_create+0x1e0/0x1e0 [ 63.377108][ T7133] ? copy_siginfo_to_user32+0xa0/0xa0 [ 63.382459][ T7133] ? ep_unregister_pollwait.constprop.0+0x3c0/0x3c0 [ 63.389024][ T7133] ? __might_fault+0x190/0x1d0 [ 63.393777][ T7133] ? exit_to_user_mode_prepare+0xb9/0x1c0 [ 63.399473][ T7133] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 63.405428][ T7133] exit_to_user_mode_prepare+0x15d/0x1c0 [ 63.411059][ T7133] syscall_exit_to_user_mode+0x59/0x2b0 [ 63.416596][ T7133] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.422474][ T7133] RIP: 0033:0x45d5b9 [ 63.426348][ T7133] Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.445933][ T7133] RSP: 002b:00007efd95cd2c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 [ 63.454332][ T7133] RAX: 0000000000000000 RBX: 0000000000002ac0 RCX: 000000000045d5b9 [ 63.462289][ T7133] RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000006 [ 63.470248][ T7133] RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 [ 63.478198][ T7133] R10: 0000000020000000 R11: 0000000000000246 R12: 000000000118cf4c [ 63.486156][ T7133] R13: 00007ffca6b68abf R14: 00007efd95cd39c0 R15: 000000000118cf4c [ 63.495488][ T7133] Kernel Offset: disabled [ 63.499875][ T7133] Rebooting in 86400 seconds..