[ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.250' (ECDSA) to the list of known hosts. syzkaller login: [ 41.889619][ T7023] IPVS: ftp: loaded support on port[0] = 21 [ 41.972688][ T7023] chnl_net:caif_netlink_parms(): no params data found [ 42.016688][ T7023] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.024977][ T7023] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.033979][ T7023] device bridge_slave_0 entered promiscuous mode [ 42.044111][ T7023] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.051944][ T7023] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.059851][ T7023] device bridge_slave_1 entered promiscuous mode [ 42.077692][ T7023] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 42.089518][ T7023] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 42.109466][ T7023] team0: Port device team_slave_0 added [ 42.118732][ T7023] team0: Port device team_slave_1 added [ 42.134871][ T7023] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 42.142584][ T7023] 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. [ 42.169410][ T7023] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 42.183396][ T7023] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 42.190355][ T7023] 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. [ 42.217901][ T7023] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 42.294200][ T7023] device hsr_slave_0 entered promiscuous mode [ 42.331615][ T7023] device hsr_slave_1 entered promiscuous mode [ 42.467671][ T7023] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 42.503890][ T7023] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 42.553690][ T7023] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 42.593439][ T7023] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 42.645802][ T7023] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.653091][ T7023] bridge0: port 2(bridge_slave_1) entered forwarding state [ 42.661207][ T7023] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.669028][ T7023] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.706581][ T7023] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.721714][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.732446][ T26] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.742913][ T26] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.753118][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 42.767365][ T7023] 8021q: adding VLAN 0 to HW filter on device team0 [ 42.778362][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 42.787711][ T2695] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.795001][ T2695] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.811653][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 42.820122][ T26] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.827238][ T26] bridge0: port 2(bridge_slave_1) entered forwarding state [ 42.846162][ T7023] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 42.857172][ T7023] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 42.870347][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 42.879359][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 42.888291][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 42.898870][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 42.913721][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 42.921512][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 42.946076][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 42.954511][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 42.966924][ T7023] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 42.983826][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 42.995056][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 43.012755][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 43.022086][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 43.032909][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 43.041633][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 43.050593][ T7023] device veth0_vlan entered promiscuous mode [ 43.063006][ T7023] device veth1_vlan entered promiscuous mode [ 43.086581][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 43.095657][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 43.104471][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 43.113385][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 43.125414][ T7023] device veth0_macvtap entered promiscuous mode [ 43.137708][ T7023] device veth1_macvtap entered promiscuous mode [ 43.152835][ T7023] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 43.160402][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 43.171846][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 43.179662][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 43.190567][ T2695] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 43.202756][ T7023] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 43.212001][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 43.220435][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 43.398429][ T7233] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 78.813253][ T7023] ------------[ cut here ]------------ [ 78.818852][ T7023] WARNING: CPU: 0 PID: 7023 at fs/inode.c:303 drop_nlink+0xb9/0x100 [ 78.826801][ T7023] Kernel panic - not syncing: panic_on_warn set ... [ 78.833366][ T7023] CPU: 0 PID: 7023 Comm: syz-executor433 Not tainted 5.7.0-rc2-syzkaller #0 [ 78.842529][ T7023] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.852593][ T7023] Call Trace: [ 78.855863][ T7023] dump_stack+0x1e9/0x30e [ 78.860181][ T7023] panic+0x264/0x7a0 [ 78.864059][ T7023] ? __warn+0x102/0x210 [ 78.868200][ T7023] ? drop_nlink+0xb9/0x100 [ 78.872587][ T7023] __warn+0x209/0x210 [ 78.876543][ T7023] ? drop_nlink+0xb9/0x100 [ 78.881040][ T7023] report_bug+0x1ac/0x2d0 [ 78.885347][ T7023] do_error_trap+0xca/0x1c0 [ 78.889825][ T7023] do_invalid_op+0x32/0x40 [ 78.894213][ T7023] ? drop_nlink+0xb9/0x100 [ 78.898598][ T7023] invalid_op+0x23/0x30 [ 78.902726][ T7023] RIP: 0010:drop_nlink+0xb9/0x100 [ 78.907723][ T7023] Code: 49 8b 1e 48 8d bb b8 07 00 00 be 08 00 00 00 e8 fd 65 ef ff f0 48 ff 83 b8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 f7 b8 b1 ff <0f> 0b eb 8a 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 63 ff ff ff 4c [ 78.927312][ T7023] RSP: 0018:ffffc900015d7da0 EFLAGS: 00010293 [ 78.933355][ T7023] RAX: ffffffff81c1a899 RBX: 1ffff11010d63ab1 RCX: ffff8880a7e88200 [ 78.941431][ T7023] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 78.949414][ T7023] RBP: 0000000000000000 R08: ffffffff81c1a81e R09: ffffed1010d63ab9 [ 78.957647][ T7023] R10: ffffed1010d63ab9 R11: 0000000000000000 R12: ffff888086b1d588 [ 78.965594][ T7023] R13: 1ffff110114efcf2 R14: ffff888086b1d540 R15: dffffc0000000000 [ 78.974161][ T7023] ? drop_nlink+0x3e/0x100 [ 78.978564][ T7023] ? drop_nlink+0xb9/0x100 [ 78.982977][ T7023] minix_unlink+0xc7/0x100 [ 78.987453][ T7023] vfs_unlink+0x30c/0x5a0 [ 78.991775][ T7023] do_unlinkat+0x377/0x7e0 [ 78.996297][ T7023] do_syscall_64+0xf3/0x1b0 [ 79.000845][ T7023] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 79.006840][ T7023] RIP: 0033:0x449ac7 [ 79.010745][ T7023] Code: 0f 1f 00 b8 58 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8d cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 79.030335][ T7023] RSP: 002b:00007ffe753dcec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 79.038744][ T7023] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000449ac7 [ 79.046712][ T7023] RDX: 0000000001fb39e3 RSI: 00007ffe753dcee0 RDI: 00007ffe753dcf70 [ 79.054685][ T7023] RBP: 0000000000000002 R08: 0000000000000000 R09: 000000000000000d [ 79.062630][ T7023] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000001fb3980 [ 79.070578][ T7023] R13: 00007ffe753de060 R14: 0000000000000000 R15: 0000000000000000 [ 79.079990][ T7023] Kernel Offset: disabled [ 79.084466][ T7023] Rebooting in 86400 seconds..