[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. syzkaller login: [ 61.387466][ T6811] IPVS: ftp: loaded support on port[0] = 21 [ 61.466986][ T6811] chnl_net:caif_netlink_parms(): no params data found [ 61.516418][ T6811] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.524087][ T6811] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.531776][ T6811] device bridge_slave_0 entered promiscuous mode [ 61.541936][ T6811] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.549836][ T6811] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.558539][ T6811] device bridge_slave_1 entered promiscuous mode [ 61.578182][ T6811] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.588848][ T6811] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.610937][ T6811] team0: Port device team_slave_0 added [ 61.618259][ T6811] team0: Port device team_slave_1 added [ 61.635017][ T6811] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 61.641967][ T6811] 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. [ 61.668398][ T6811] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 61.681035][ T6811] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 61.688162][ T6811] 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. [ 61.714226][ T6811] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 61.785980][ T6811] device hsr_slave_0 entered promiscuous mode [ 61.852937][ T6811] device hsr_slave_1 entered promiscuous mode [ 61.987805][ T6811] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.035547][ T6811] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.104705][ T6811] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.144589][ T6811] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.249231][ T6811] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.256401][ T6811] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.264308][ T6811] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.271390][ T6811] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.377362][ T6811] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.391271][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.401848][ T2662] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.410692][ T2662] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.419321][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 62.432977][ T6811] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.445901][ T2550] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.454644][ T2550] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.461675][ T2550] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.484645][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 62.494342][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.503512][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.510559][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.518846][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 62.528215][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 62.537072][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 62.546541][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.555300][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 62.564168][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.583184][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.591022][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 62.599815][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.609113][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.617901][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.629496][ T6811] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.649320][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.657394][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.671743][ T6811] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.691340][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 62.700421][ T2662] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.721984][ T6811] device veth0_vlan entered promiscuous mode [ 62.730720][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 62.739990][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.751168][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.760291][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.773221][ T6811] device veth1_vlan entered promiscuous mode [ 62.795287][ T7031] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.803903][ T7031] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 62.811797][ T7031] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 62.821399][ T7031] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.833761][ T6811] device veth0_macvtap entered promiscuous mode [ 62.843842][ T6811] device veth1_macvtap entered promiscuous mode [ 62.860109][ T6811] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.867817][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 62.877286][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 62.885541][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 62.894987][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.908481][ T6811] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.916477][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 62.925947][ T7029] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.937772][ T6811] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.946982][ T6811] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.955791][ T6811] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.964580][ T6811] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program executing program [ 63.628677][ T2662] ------------[ cut here ]------------ [ 63.634557][ T2662] WARNING: CPU: 0 PID: 2662 at fs/read_write.c:528 __kernel_write+0x828/0x9b0 [ 63.644267][ T2662] Kernel panic - not syncing: panic_on_warn set ... [ 63.650892][ T2662] CPU: 0 PID: 2662 Comm: kworker/0:2 Not tainted 5.8.0-rc4-next-20200713-syzkaller #0 [ 63.660405][ T2662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.670472][ T2662] Workqueue: events p9_write_work [ 63.675474][ T2662] Call Trace: [ 63.678747][ T2662] dump_stack+0x18f/0x20d [ 63.683063][ T2662] panic+0x2e3/0x75c [ 63.687035][ T2662] ? __warn_printk+0xf3/0xf3 [ 63.691613][ T2662] ? printk+0xba/0xed [ 63.695611][ T2662] ? log_store.cold+0x16/0x16 [ 63.700268][ T2662] ? __warn.cold+0x5/0x45 [ 63.704587][ T2662] ? __warn+0xd6/0x1f2 [ 63.708640][ T2662] ? __kernel_write+0x828/0x9b0 [ 63.713472][ T2662] __warn.cold+0x20/0x45 [ 63.717699][ T2662] ? __kernel_write+0x828/0x9b0 [ 63.722531][ T2662] report_bug+0x1bd/0x210 [ 63.726842][ T2662] handle_bug+0x38/0x90 [ 63.730980][ T2662] exc_invalid_op+0x13/0x40 [ 63.735464][ T2662] asm_exc_invalid_op+0x12/0x20 [ 63.740329][ T2662] RIP: 0010:__kernel_write+0x828/0x9b0 [ 63.745783][ T2662] Code: 01 89 c6 89 04 24 e8 a7 97 b5 ff 8b 04 24 85 c0 0f 84 c7 fa ff ff e9 b9 fa ff ff e8 12 9b b5 ff e9 e9 fe ff ff e8 08 9b b5 ff <0f> 0b 49 c7 c5 f7 ff ff ff e9 0e ff ff ff 4c 89 f7 e8 72 43 f5 ff [ 63.765372][ T2662] RSP: 0018:ffffc900086e7b18 EFLAGS: 00010293 [ 63.771417][ T2662] RAX: 0000000000000000 RBX: 1ffff920010dcf67 RCX: ffffffff81be8f0e [ 63.779366][ T2662] RDX: ffff88809f118000 RSI: ffffffff81be9668 RDI: 0000000000000005 [ 63.787317][ T2662] RBP: ffff88809e58d118 R08: 0000000000000001 R09: ffff88809f1188d0 [ 63.795304][ T2662] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809e58d000 [ 63.803253][ T2662] R13: 0000000000000000 R14: ffff88809e58d084 R15: 00000000040a0001 [ 63.811218][ T2662] ? __kernel_write+0xce/0x9b0 [ 63.815978][ T2662] ? __kernel_write+0x828/0x9b0 [ 63.820846][ T2662] ? __kernel_write+0x828/0x9b0 [ 63.825697][ T2662] ? vfs_read+0x520/0x520 [ 63.830021][ T2662] ? apparmor_file_permission+0x26e/0x4e0 [ 63.835721][ T2662] ? security_file_permission+0x239/0x470 [ 63.841418][ T2662] ? lock_downgrade+0x820/0x820 [ 63.846251][ T2662] kernel_write+0xe2/0x200 [ 63.850650][ T2662] p9_write_work+0x25e/0xca0 [ 63.855225][ T2662] process_one_work+0x94c/0x1670 [ 63.860158][ T2662] ? lock_release+0x8d0/0x8d0 [ 63.864815][ T2662] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 63.870176][ T2662] ? rwlock_bug.part.0+0x90/0x90 [ 63.875092][ T2662] ? lockdep_hardirqs_off+0x66/0xa0 [ 63.880272][ T2662] worker_thread+0x64c/0x1120 [ 63.884932][ T2662] ? __kthread_parkme+0x13f/0x1e0 [ 63.889936][ T2662] ? process_one_work+0x1670/0x1670 [ 63.895130][ T2662] kthread+0x3b5/0x4a0 [ 63.899188][ T2662] ? __kthread_bind_mask+0xc0/0xc0 [ 63.904291][ T2662] ret_from_fork+0x1f/0x30 [ 63.909806][ T2662] Kernel Offset: disabled [ 63.914191][ T2662] Rebooting in 86400 seconds..