[ 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 '10.128.0.30' (ECDSA) to the list of known hosts. 2020/07/06 11:28:55 fuzzer started 2020/07/06 11:28:55 dialing manager at 10.128.0.105:33297 2020/07/06 11:28:55 syscalls: 3114 2020/07/06 11:28:55 code coverage: enabled 2020/07/06 11:28:55 comparison tracing: enabled 2020/07/06 11:28:55 extra coverage: enabled 2020/07/06 11:28:55 setuid sandbox: enabled 2020/07/06 11:28:55 namespace sandbox: enabled 2020/07/06 11:28:55 Android sandbox: /sys/fs/selinux/policy does not exist 2020/07/06 11:28:55 fault injection: enabled 2020/07/06 11:28:55 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/07/06 11:28:55 net packet injection: enabled 2020/07/06 11:28:55 net device setup: enabled 2020/07/06 11:28:55 concurrency sanitizer: enabled 2020/07/06 11:28:55 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/07/06 11:28:55 USB emulation: enabled 2020/07/06 11:28:58 suppressing KCSAN reports in functions: 'ext4_mb_good_group' 'do_readlinkat' 'blk_mq_sched_dispatch_requests' 'ext4_writepages' 'generic_write_end' 'blk_mq_dispatch_rq_list' 'n_tty_receive_buf_common' 'futex_wait_queue_me' '__xa_clear_mark' '__ext4_new_inode' '__delete_from_page_cache' 'do_sys_poll' 'dput' 'atime_needs_update' 'ext4_ext_insert_extent' 'do_syslog' 'audit_log_start' 'shmem_file_read_iter' 'do_epoll_wait' 'pcpu_alloc' 'do_select' 'shmem_unlink' 'exit_mm' 'alloc_pid' '__delayacct_blkio_end' 'tick_nohz_next_event' 'tick_sched_timer' 'expire_timers' 'do_signal_stop' 'blk_mq_rq_ctx_init' 'kcm_rfree' 'do_nanosleep' 'ext4_mark_iloc_dirty' 'find_get_pages_range_tag' 'xas_clear_mark' 'n_tty_receive_char_inline' 'page_counter_charge' 'ext4_free_inode' '__mark_inode_dirty' 'ext4_free_inodes_count' 'dd_has_work' 'io_sq_thread' 11:30:07 executing program 0: pipe(&(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) sendmsg$IPSET_CMD_DEL(0xffffffffffffffff, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=ANY=[@ANYBLOB="c40000000406010100800003e2ffff020004003a0500010006"], 0x1}}, 0x0) r2 = socket$nl_netfilter(0x10, 0x3, 0xc) write$binfmt_misc(r1, &(0x7f0000000140)=ANY=[], 0xff99) r3 = socket$inet_udplite(0x2, 0x2, 0x88) r4 = dup(r3) ioctl$PERF_EVENT_IOC_ENABLE(r4, 0x8912, 0x400200) splice(r0, 0x0, r2, 0x0, 0x8007fc1, 0x0) syzkaller login: [ 103.810381][ T8663] IPVS: ftp: loaded support on port[0] = 21 [ 103.875434][ T8663] chnl_net:caif_netlink_parms(): no params data found [ 103.914199][ T8663] bridge0: port 1(bridge_slave_0) entered blocking state 11:30:08 executing program 1: perf_event_open(&(0x7f0000000140)={0x2, 0x70, 0xe9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10000003, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) r0 = openat$sndtimer(0xffffffffffffff9c, &(0x7f0000000280)='/dev/snd/timer\x00', 0x0) ioctl$SNDRV_TIMER_IOCTL_SELECT(r0, 0x40345410, &(0x7f0000000300)={{0x0, 0x2}}) ioctl$SNDRV_TIMER_IOCTL_CONTINUE(r0, 0x54a2) [ 103.921584][ T8663] bridge0: port 1(bridge_slave_0) entered disabled state [ 103.929224][ T8663] device bridge_slave_0 entered promiscuous mode [ 103.936760][ T8663] bridge0: port 2(bridge_slave_1) entered blocking state [ 103.944235][ T8663] bridge0: port 2(bridge_slave_1) entered disabled state [ 103.952380][ T8663] device bridge_slave_1 entered promiscuous mode [ 103.967502][ T8663] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 103.978267][ T8663] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 103.996319][ T8663] team0: Port device team_slave_0 added [ 104.003452][ T8663] team0: Port device team_slave_1 added [ 104.017561][ T8663] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 104.024863][ T8663] 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. [ 104.051286][ T8663] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 104.063003][ T8663] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 104.070244][ T8663] 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. [ 104.105443][ T8663] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 104.121163][ T8817] IPVS: ftp: loaded support on port[0] = 21 11:30:08 executing program 2: r0 = perf_event_open(&(0x7f000025c000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2202, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffff7fffffffffff, 0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80000001, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r1 = perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x81, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0xfffbffffffffffff, 0xffffffffffffffff, 0x0) mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x0, 0x11, r1, 0x0) ioctl$PERF_EVENT_IOC_SET_OUTPUT(r0, 0x2405, r1) clone(0x100, 0x0, 0xfffffffffffffffe, 0x0, 0xffffffffffffffff) [ 104.180119][ T8663] device hsr_slave_0 entered promiscuous mode [ 104.228959][ T8663] device hsr_slave_1 entered promiscuous mode [ 104.326599][ T8829] IPVS: ftp: loaded support on port[0] = 21 11:30:08 executing program 3: r0 = socket$nl_route(0x10, 0x3, 0x0) sendmsg$nl_route(0xffffffffffffffff, 0x0, 0x0) sendmsg$nl_route_sched(0xffffffffffffffff, 0x0, 0x0) sendmsg$nl_route_sched(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000540)=ANY=[@ANYBLOB='T\x00\x00\x00(\x00\'\r\x00'/20, @ANYRES32, @ANYBLOB="0000000000000000000000000a000100726f75746500000024000200080001000d"], 0x54}}, 0x0) [ 104.413423][ T8817] chnl_net:caif_netlink_parms(): no params data found [ 104.429889][ T8663] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 104.471670][ T8663] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 104.547320][ T8997] IPVS: ftp: loaded support on port[0] = 21 [ 104.553280][ T8663] netdevsim netdevsim0 netdevsim2: renamed from eth2 11:30:08 executing program 4: perf_event_open(&(0x7f0000000140)={0x2, 0x70, 0xe9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10000003, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r0 = socket$packet(0x11, 0x3, 0x300) setsockopt$packet_tx_ring(r0, 0x107, 0xd, &(0x7f0000000040)=@req3={0x10000, 0x100000001, 0x10000, 0x1}, 0x1c) ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000080)={'bridge_slave_1\x00', 0x0}) bind$packet(r0, &(0x7f0000000140)={0x11, 0x0, r1, 0x1, 0x0, 0x6, @remote}, 0x14) sendmmsg(r0, &(0x7f0000003c80)=[{{0x0, 0x0, 0x0}}], 0x1, 0x0) [ 104.641091][ T8663] netdevsim netdevsim0 netdevsim3: renamed from eth3 11:30:08 executing program 5: r0 = socket$inet6_udplite(0xa, 0x2, 0x88) ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000340)={'batadv_slave_0\x00', 0x0}) r2 = socket(0x10, 0x80002, 0x0) sendmsg$nl_route(r2, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000240)=@bridge_setlink={0x20, 0x13, 0xa29, 0x0, 0x0, {0x7, 0x0, 0x0, r1}}, 0x20}}, 0x0) [ 104.824875][ T8663] bridge0: port 2(bridge_slave_1) entered blocking state [ 104.824896][ T9040] IPVS: ftp: loaded support on port[0] = 21 [ 104.831934][ T8663] bridge0: port 2(bridge_slave_1) entered forwarding state [ 104.831978][ T8663] bridge0: port 1(bridge_slave_0) entered blocking state [ 104.852050][ T8663] bridge0: port 1(bridge_slave_0) entered forwarding state [ 104.864902][ T8829] chnl_net:caif_netlink_parms(): no params data found [ 104.944064][ T8303] bridge0: port 1(bridge_slave_0) entered disabled state [ 104.952302][ T8303] bridge0: port 2(bridge_slave_1) entered disabled state [ 104.974746][ T9132] IPVS: ftp: loaded support on port[0] = 21 [ 105.000958][ T8817] bridge0: port 1(bridge_slave_0) entered blocking state [ 105.007978][ T8817] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.016106][ T8817] device bridge_slave_0 entered promiscuous mode [ 105.023992][ T8817] bridge0: port 2(bridge_slave_1) entered blocking state [ 105.031056][ T8817] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.038650][ T8817] device bridge_slave_1 entered promiscuous mode [ 105.061861][ T8997] chnl_net:caif_netlink_parms(): no params data found [ 105.070597][ T8829] bridge0: port 1(bridge_slave_0) entered blocking state [ 105.077629][ T8829] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.085342][ T8829] device bridge_slave_0 entered promiscuous mode [ 105.093814][ T8829] bridge0: port 2(bridge_slave_1) entered blocking state [ 105.101140][ T8829] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.108475][ T8829] device bridge_slave_1 entered promiscuous mode [ 105.144481][ T8817] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 105.156099][ T8817] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 105.203095][ T8817] team0: Port device team_slave_0 added [ 105.209543][ T8829] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 105.231132][ T8663] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.241024][ T8817] team0: Port device team_slave_1 added [ 105.246691][ T8997] bridge0: port 1(bridge_slave_0) entered blocking state [ 105.254360][ T8997] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.261885][ T8997] device bridge_slave_0 entered promiscuous mode [ 105.269250][ T8829] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 105.278302][ T8997] bridge0: port 2(bridge_slave_1) entered blocking state [ 105.286060][ T8997] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.293578][ T8997] device bridge_slave_1 entered promiscuous mode [ 105.307791][ T9040] chnl_net:caif_netlink_parms(): no params data found [ 105.323487][ T8817] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 105.330808][ T8817] 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. [ 105.356911][ T8817] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 105.390175][ T8817] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 105.397114][ T8817] 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. [ 105.423907][ T8817] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 105.438878][ T8997] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 105.450841][ T9132] chnl_net:caif_netlink_parms(): no params data found [ 105.464492][ T8829] team0: Port device team_slave_0 added [ 105.485309][ T8997] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 105.500011][ T8829] team0: Port device team_slave_1 added [ 105.527781][ T9040] bridge0: port 1(bridge_slave_0) entered blocking state [ 105.534820][ T9040] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.542662][ T9040] device bridge_slave_0 entered promiscuous mode [ 105.550086][ T8997] team0: Port device team_slave_0 added [ 105.561318][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 105.569996][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 105.581272][ T8829] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 105.588205][ T8829] 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. [ 105.614312][ T8829] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 105.670336][ T8817] device hsr_slave_0 entered promiscuous mode [ 105.729096][ T8817] device hsr_slave_1 entered promiscuous mode [ 105.788802][ T8817] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 105.796400][ T8817] Cannot create hsr debugfs directory [ 105.802914][ T8997] team0: Port device team_slave_1 added [ 105.808643][ T9040] bridge0: port 2(bridge_slave_1) entered blocking state [ 105.815997][ T9040] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.824559][ T9040] device bridge_slave_1 entered promiscuous mode [ 105.831819][ T8663] 8021q: adding VLAN 0 to HW filter on device team0 [ 105.838962][ T8829] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 105.845889][ T8829] 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. [ 105.871815][ T8829] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 105.882555][ T9132] bridge0: port 1(bridge_slave_0) entered blocking state [ 105.889907][ T9132] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.897453][ T9132] device bridge_slave_0 entered promiscuous mode [ 105.917416][ T9132] bridge0: port 2(bridge_slave_1) entered blocking state [ 105.925224][ T9132] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.932971][ T9132] device bridge_slave_1 entered promiscuous mode [ 105.959765][ T9040] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 105.970936][ T9040] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 105.982972][ T9132] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 105.992501][ T8997] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 105.999686][ T8997] 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. [ 106.025788][ T8997] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 106.037603][ T8997] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 106.044596][ T8997] 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. [ 106.070582][ T8997] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 106.097767][ T9132] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 106.110429][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 106.118770][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 106.126974][ T48] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.134022][ T48] bridge0: port 1(bridge_slave_0) entered forwarding state [ 106.170474][ T8829] device hsr_slave_0 entered promiscuous mode [ 106.208993][ T8829] device hsr_slave_1 entered promiscuous mode [ 106.248825][ T8829] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 106.256587][ T8829] Cannot create hsr debugfs directory [ 106.275151][ T9040] team0: Port device team_slave_0 added [ 106.282322][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 106.290864][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 106.300427][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.307425][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 106.322420][ T9132] team0: Port device team_slave_0 added [ 106.370330][ T8997] device hsr_slave_0 entered promiscuous mode [ 106.419000][ T8997] device hsr_slave_1 entered promiscuous mode [ 106.458809][ T8997] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 106.466349][ T8997] Cannot create hsr debugfs directory [ 106.472375][ T9040] team0: Port device team_slave_1 added [ 106.481667][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 106.490391][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 106.500753][ T9132] team0: Port device team_slave_1 added [ 106.519859][ T9132] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 106.526790][ T9132] 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. [ 106.553625][ T9132] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 106.579170][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 106.588039][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 106.597580][ T9132] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 106.604860][ T9132] 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. [ 106.631085][ T9132] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 106.642228][ T9040] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 106.649733][ T9040] 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. [ 106.676237][ T9040] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 106.687453][ T8817] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 106.751461][ T8817] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 106.791538][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 106.840099][ T9132] device hsr_slave_0 entered promiscuous mode [ 106.878962][ T9132] device hsr_slave_1 entered promiscuous mode [ 106.918953][ T9132] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 106.926516][ T9132] Cannot create hsr debugfs directory [ 106.932556][ T9040] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 106.939662][ T9040] 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. [ 106.965563][ T9040] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 106.978954][ T8817] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 107.012470][ T8817] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 107.065645][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 107.074103][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 107.083042][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 107.091391][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.099624][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 107.107692][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 107.170170][ T9040] device hsr_slave_0 entered promiscuous mode [ 107.199092][ T9040] device hsr_slave_1 entered promiscuous mode [ 107.248934][ T9040] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 107.256510][ T9040] Cannot create hsr debugfs directory [ 107.263341][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 107.306142][ T8663] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 107.320168][ T4739] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 107.327494][ T4739] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 107.364560][ T8997] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 107.441112][ T8997] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 107.481104][ T8997] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 107.532670][ T8997] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 107.578756][ T4739] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 107.587315][ T4739] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 107.610029][ T8829] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 107.660758][ T8829] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 107.737251][ T8817] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.747800][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 107.756120][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 107.769360][ T8829] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 107.801586][ T8663] device veth0_vlan entered promiscuous mode [ 107.809692][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 107.817286][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 107.825076][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 107.832857][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 107.842930][ T9132] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 107.910612][ T9132] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 107.941140][ T9132] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 107.990079][ T8829] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 108.037715][ T8663] device veth1_vlan entered promiscuous mode [ 108.047535][ T8817] 8021q: adding VLAN 0 to HW filter on device team0 [ 108.057216][ T9132] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 108.124657][ T9040] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 108.179339][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 108.187480][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 108.208178][ T8663] device veth0_macvtap entered promiscuous mode [ 108.217338][ T9040] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 108.262050][ T9040] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 108.321218][ T9040] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 108.370015][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 108.378284][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 108.386617][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 108.395014][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 108.403292][ T49] bridge0: port 1(bridge_slave_0) entered blocking state [ 108.410340][ T49] bridge0: port 1(bridge_slave_0) entered forwarding state [ 108.420527][ T8663] device veth1_macvtap entered promiscuous mode [ 108.439445][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 108.447292][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 108.457329][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 108.465385][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 108.474064][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 108.482478][ T49] bridge0: port 2(bridge_slave_1) entered blocking state [ 108.489518][ T49] bridge0: port 2(bridge_slave_1) entered forwarding state [ 108.517624][ T8663] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 108.532580][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 108.541191][ T3929] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 108.561563][ T8997] 8021q: adding VLAN 0 to HW filter on device bond0 [ 108.572120][ T8663] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 108.589815][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 108.598217][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 108.606938][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 108.615818][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 108.624823][ T48] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 108.633172][ T7] ================================================================== [ 108.641238][ T7] BUG: KCSAN: data-race in __writeback_single_inode / __xa_set_mark [ 108.649176][ T7] [ 108.651476][ T7] write to 0xffff8881205fd76c of 4 bytes by task 8282 on cpu 0: [ 108.659104][ T7] __xa_set_mark+0x317/0x330 [ 108.663677][ T7] __set_page_dirty+0x17e/0x1d0 [ 108.668508][ T7] mark_buffer_dirty+0x12e/0x260 [ 108.673409][ T7] block_write_end+0x13d/0x220 [ 108.678142][ T7] generic_write_end+0x5c/0x220 [ 108.682965][ T7] ext4_da_write_end+0x57e/0x760 [ 108.687872][ T7] generic_perform_write+0x23b/0x390 [ 108.693123][ T7] ext4_buffered_write_iter+0x2cc/0x3b0 [ 108.698634][ T7] ext4_file_write_iter+0x76f/0x1010 [ 108.703901][ T7] __vfs_write+0x2d8/0x340 [ 108.708309][ T7] vfs_write+0x19b/0x350 [ 108.712519][ T7] ksys_write+0xce/0x180 [ 108.716728][ T7] __x64_sys_write+0x3e/0x50 [ 108.721308][ T7] do_syscall_64+0x51/0xb0 [ 108.725707][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 108.731559][ T7] [ 108.733856][ T7] read to 0xffff8881205fd76c of 4 bytes by task 7 on cpu 1: [ 108.741116][ T7] __writeback_single_inode+0x273/0x610 [ 108.746673][ T7] writeback_sb_inodes+0x5ac/0xe40 [ 108.751753][ T7] __writeback_inodes_wb+0xb2/0x240 [ 108.757040][ T7] wb_writeback+0x2e0/0x730 [ 108.761527][ T7] wb_do_writeback+0x5cc/0x610 [ 108.766312][ T7] wb_workfn+0xc8/0x460 [ 108.770441][ T7] process_one_work+0x3e1/0x9a0 [ 108.775271][ T7] worker_thread+0x665/0xbe0 [ 108.779844][ T7] kthread+0x20d/0x230 [ 108.783890][ T7] ret_from_fork+0x1f/0x30 [ 108.788268][ T7] [ 108.790569][ T7] Reported by Kernel Concurrency Sanitizer on: [ 108.796693][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc4-syzkaller #0 [ 108.804805][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.814829][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 108.820776][ T7] ================================================================== [ 108.828806][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 108.835433][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc4-syzkaller #0 [ 108.843596][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.853638][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 108.859606][ T7] Call Trace: [ 108.862889][ T7] dump_stack+0x10f/0x19d [ 108.867184][ T7] panic+0x207/0x64a [ 108.871064][ T7] ? vprintk_emit+0x44a/0x4f0 [ 108.875708][ T7] kcsan_report+0x684/0x690 [ 108.880180][ T7] ? kcsan_setup_watchpoint+0x453/0x4d0 [ 108.885688][ T7] ? __writeback_single_inode+0x273/0x610 [ 108.891371][ T7] ? writeback_sb_inodes+0x5ac/0xe40 [ 108.896637][ T7] ? __writeback_inodes_wb+0xb2/0x240 [ 108.901980][ T7] ? wb_writeback+0x2e0/0x730 [ 108.906633][ T7] ? wb_do_writeback+0x5cc/0x610 [ 108.911544][ T7] ? wb_workfn+0xc8/0x460 [ 108.915871][ T7] ? process_one_work+0x3e1/0x9a0 [ 108.920898][ T7] ? worker_thread+0x665/0xbe0 [ 108.925628][ T7] ? kthread+0x20d/0x230 [ 108.929838][ T7] ? ret_from_fork+0x1f/0x30 [ 108.934415][ T7] kcsan_setup_watchpoint+0x453/0x4d0 [ 108.939785][ T7] __writeback_single_inode+0x273/0x610 [ 108.945349][ T7] writeback_sb_inodes+0x5ac/0xe40 [ 108.950438][ T7] ? down_read_trylock+0x5b/0x70 [ 108.955356][ T7] __writeback_inodes_wb+0xb2/0x240 [ 108.960540][ T7] wb_writeback+0x2e0/0x730 [ 108.965023][ T7] wb_do_writeback+0x5cc/0x610 [ 108.969777][ T7] wb_workfn+0xc8/0x460 [ 108.973924][ T7] ? __rcu_read_unlock+0x4b/0x260 [ 108.978923][ T7] ? _raw_spin_lock+0x14/0x50 [ 108.983575][ T7] ? newidle_balance+0x267/0x300 [ 108.988475][ T7] ? find_next_bit+0xc6/0xf0 [ 108.993043][ T7] process_one_work+0x3e1/0x9a0 [ 108.997884][ T7] worker_thread+0x665/0xbe0 [ 109.002455][ T7] ? process_one_work+0x9a0/0x9a0 [ 109.007450][ T7] kthread+0x20d/0x230 [ 109.011499][ T7] ? process_one_work+0x9a0/0x9a0 [ 109.016489][ T7] ? kthread_blkcg+0x80/0x80 [ 109.021059][ T7] ret_from_fork+0x1f/0x30 [ 109.026513][ T7] Kernel Offset: disabled [ 109.030834][ T7] Rebooting in 86400 seconds..