INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 syzkaller login: [ 42.395188] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 42.593836] ip (4554) used greatest stack depth: 54264 bytes left [ 42.680372] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.686798] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.694116] device bridge_slave_0 entered promiscuous mode [ 42.715308] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.721717] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.728967] device bridge_slave_1 entered promiscuous mode [ 42.749821] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.771277] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.797505] ip (4573) used greatest stack depth: 54200 bytes left [ 42.831480] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.855564] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.944621] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 42.951880] team0: Port device team_slave_0 added [ 42.971988] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 42.979467] team0: Port device team_slave_1 added [ 43.000061] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.023303] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.047113] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.071549] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 43.248287] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.254710] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.261508] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.267910] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 43.921451] 8021q: adding VLAN 0 to HW filter on device bond0 [ 43.986019] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.050432] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.056668] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.064869] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.126618] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.684739] ================================================================== [ 47.692127] BUG: KMSAN: uninit-value in __skb_checksum_complete+0x30e/0x430 [ 47.699205] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.16.0+ #85 [ 47.705585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.714919] Call Trace: [ 47.717503] dump_stack+0x185/0x1d0 [ 47.721125] ? __skb_checksum_complete+0x30e/0x430 [ 47.726057] kmsan_report+0x142/0x240 [ 47.729854] __msan_warning_32+0x6c/0xb0 executing program executing program executing program executing program [ 47.733915] __skb_checksum_complete+0x30e/0x430 [ 47.738673] icmpv6_rcv+0xbfd/0x39b0 [ 47.742384] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 47.747745] ? raw6_local_deliver+0x124/0x1fd0 [ 47.752326] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 47.757773] ? kmsan_set_origin_inline+0x6b/0x120 [ 47.763034] ? __msan_poison_alloca+0xe0/0x1d0 [ 47.767619] ? icmpv6_sk_exit+0x2b0/0x2b0 [ 47.771767] ip6_input_finish+0xaac/0x2250 [ 47.776009] ? nf_hook_slow+0x36f/0x3d0 [ 47.779990] ? ip6_input_finish+0x13d1/0x2250 executing program executing program executing program executing program [ 47.784494] ip6_input+0x294/0x320 [ 47.788041] ? ip6_input+0x320/0x320 [ 47.791757] ? ipv6_rcv+0x2340/0x2340 [ 47.795553] ip6_rcv_finish+0x46e/0x6e0 [ 47.799526] ipv6_rcv+0x1e16/0x2340 [ 47.803151] ? local_bh_enable+0x40/0x40 [ 47.807217] __netif_receive_skb_core+0x47df/0x4a90 [ 47.812235] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 47.817598] ? kmsan_write_aligned_origin_inline+0x60/0x60 [ 47.823220] ? ip6_rcv_finish+0x6e0/0x6e0 [ 47.827369] process_backlog+0x62d/0xe20 [ 47.831434] ? rps_trigger_softirq+0x2f0/0x2f0 [ 47.836004] net_rx_action+0x7c1/0x1a70 [ 47.839987] ? net_tx_action+0xab0/0xab0 [ 47.844043] __do_softirq+0x56d/0x93d [ 47.847843] ? ksoftirqd_should_run+0x30/0x30 [ 47.852334] run_ksoftirqd+0x1f/0x40 [ 47.856047] smpboot_thread_fn+0x488/0x970 [ 47.860282] ? cpu_report_death+0x1e0/0x1e0 [ 47.864598] kthread+0x539/0x720 [ 47.867960] ? cpu_report_death+0x1e0/0x1e0 [ 47.872274] ? kthread_blkcg+0xf0/0xf0 [ 47.876157] ret_from_fork+0x35/0x40 [ 47.879859] [ 47.881473] Uninit was stored to memory at: [ 47.885791] kmsan_internal_chain_origin+0x12b/0x210 [ 47.890885] kmsan_memcpy_origins+0x11d/0x170 [ 47.895372] __msan_memcpy+0x109/0x160 [ 47.899253] csum_partial_copy+0xbc/0x500 [ 47.903394] skb_copy_and_csum_bits+0x71a/0x1110 [ 47.908160] icmpv6_getfrag+0x174/0x360 [ 47.912131] __ip6_append_data+0x3e34/0x4bc0 [ 47.916529] ip6_append_data+0x40e/0x6b0 [ 47.920579] icmp6_send+0x3168/0x3730 [ 47.924373] icmpv6_send+0xe0/0x110 [ 47.927994] ip6_link_failure+0x8f/0x580 [ 47.932047] ndisc_error_report+0x101/0x1a0 [ 47.936363] neigh_invalidate+0x385/0x930 [ 47.940502] neigh_timer_handler+0xd85/0x12d0 [ 47.944990] call_timer_fn+0x26a/0x5a0 [ 47.948873] __run_timers+0xda7/0x11c0 [ 47.952749] run_timer_softirq+0x43/0x70 [ 47.956802] __do_softirq+0x56d/0x93d [ 47.960589] Uninit was stored to memory at: [ 47.964902] kmsan_internal_chain_origin+0x12b/0x210 [ 47.970000] kmsan_memcpy_origins+0x11d/0x170 [ 47.974497] __msan_memcpy+0x109/0x160 [ 47.978378] csum_partial_copy+0xbc/0x500 [ 47.982518] csum_and_copy_from_iter_full+0x107d/0x1a60 [ 47.987874] ip_generic_getfrag+0x1f0/0x3b0 [ 47.992186] __ip6_append_data+0x24fc/0x4bc0 [ 47.996592] ip6_append_data+0x40e/0x6b0 [ 48.000644] udpv6_sendmsg+0xfcc/0x47c0 [ 48.004608] inet_sendmsg+0x48d/0x740 [ 48.008424] kernel_sendmsg+0x228/0x2d0 [ 48.012390] sock_no_sendpage+0x1c8/0x250 [ 48.016531] sock_sendpage+0x1de/0x2c0 [ 48.020410] pipe_to_sendpage+0x31b/0x430 [ 48.024546] __splice_from_pipe+0x49a/0xf30 [ 48.028859] generic_splice_sendpage+0x1c6/0x2a0 [ 48.033609] direct_splice_actor+0x19b/0x200 [ 48.038006] splice_direct_to_actor+0x764/0x1040 [ 48.042758] do_splice_direct+0x335/0x540 [ 48.046898] do_sendfile+0x1067/0x1e40 [ 48.050777] SYSC_sendfile64+0x1b3/0x300 [ 48.054828] SyS_sendfile64+0x64/0x90 [ 48.058619] do_syscall_64+0x309/0x430 [ 48.062495] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 48.067666] Uninit was created at: [ 48.071210] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 48.076213] kmsan_alloc_page+0x82/0xe0 [ 48.080186] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 48.084934] alloc_pages_vma+0xcc8/0x1800 [ 48.089072] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 48.094087] shmem_getpage_gfp+0x35db/0x5770 [ 48.098487] shmem_file_read_iter+0x508/0x1180 [ 48.103063] generic_file_splice_read+0x5d2/0x900 [ 48.107895] splice_direct_to_actor+0x4c6/0x1040 [ 48.112641] do_splice_direct+0x335/0x540 [ 48.116780] do_sendfile+0x1067/0x1e40 [ 48.120657] SYSC_sendfile64+0x1b3/0x300 [ 48.124705] SyS_sendfile64+0x64/0x90 [ 48.128498] do_syscall_64+0x309/0x430 [ 48.132377] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 48.137550] ================================================================== [ 48.144896] Disabling lock debugging due to kernel taint [ 48.150332] Kernel panic - not syncing: panic_on_warn set ... [ 48.150332] [ 48.157688] CPU: 0 PID: 7 Comm: ksoftirqd/0 Tainted: G B 4.16.0+ #85 [ 48.165381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.174721] Call Trace: [ 48.177303] dump_stack+0x185/0x1d0 [ 48.180922] panic+0x39d/0x940 [ 48.184140] ? __skb_checksum_complete+0x30e/0x430 [ 48.189065] kmsan_report+0x238/0x240 [ 48.192864] __msan_warning_32+0x6c/0xb0 [ 48.196921] __skb_checksum_complete+0x30e/0x430 [ 48.201679] icmpv6_rcv+0xbfd/0x39b0 [ 48.205390] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 48.210750] ? raw6_local_deliver+0x124/0x1fd0 [ 48.215327] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 48.220773] ? kmsan_set_origin_inline+0x6b/0x120 [ 48.225612] ? __msan_poison_alloca+0xe0/0x1d0 [ 48.230193] ? icmpv6_sk_exit+0x2b0/0x2b0 [ 48.234338] ip6_input_finish+0xaac/0x2250 [ 48.238576] ? nf_hook_slow+0x36f/0x3d0 [ 48.242546] ? ip6_input_finish+0x13d1/0x2250 [ 48.247044] ip6_input+0x294/0x320 [ 48.250576] ? ip6_input+0x320/0x320 [ 48.254282] ? ipv6_rcv+0x2340/0x2340 [ 48.258076] ip6_rcv_finish+0x46e/0x6e0 [ 48.262054] ipv6_rcv+0x1e16/0x2340 [ 48.265678] ? local_bh_enable+0x40/0x40 [ 48.269744] __netif_receive_skb_core+0x47df/0x4a90 [ 48.274757] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 48.280117] ? kmsan_write_aligned_origin_inline+0x60/0x60 [ 48.285739] ? ip6_rcv_finish+0x6e0/0x6e0 [ 48.289884] process_backlog+0x62d/0xe20 [ 48.293943] ? rps_trigger_softirq+0x2f0/0x2f0 [ 48.298520] net_rx_action+0x7c1/0x1a70 [ 48.302491] ? net_tx_action+0xab0/0xab0 [ 48.306548] __do_softirq+0x56d/0x93d [ 48.310346] ? ksoftirqd_should_run+0x30/0x30 [ 48.314833] run_ksoftirqd+0x1f/0x40 [ 48.318545] smpboot_thread_fn+0x488/0x970 [ 48.322784] ? cpu_report_death+0x1e0/0x1e0 [ 48.327100] kthread+0x539/0x720 [ 48.330461] ? cpu_report_death+0x1e0/0x1e0 [ 48.334782] ? kthread_blkcg+0xf0/0xf0 [ 48.338663] ret_from_fork+0x35/0x40 [ 48.342873] Dumping ftrace buffer: [ 48.346388] (ftrace buffer empty) [ 48.350070] Kernel Offset: disabled [ 48.353671] Rebooting in 86400 seconds..