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 '10.128.0.53' (ECDSA) to the list of known hosts. 2018/04/07 07:40:24 fuzzer started 2018/04/07 07:40:25 dialing manager at 10.128.0.26:38639 2018/04/07 07:40:31 kcov=true, comps=false 2018/04/07 07:40:34 executing program 0: r0 = socket$inet(0x2, 0x4000000000000001, 0x0) bind$inet(r0, &(0x7f0000366000)={0x2, 0x4e23, @broadcast=0xffffffff}, 0x10) sendto$inet(r0, &(0x7f0000fd0000), 0xfffffffffffffec1, 0x20000801, &(0x7f0000deaff0)={0x2, 0x4e23, @loopback=0x7f000001}, 0x10) getsockopt$inet_int(r0, 0x0, 0xe, &(0x7f0000000640), &(0x7f0000000680)=0x4) 2018/04/07 07:40:34 executing program 2: r0 = socket$inet(0x2, 0x3, 0x400000011) sendmsg(r0, &(0x7f00000008c0)={&(0x7f0000000000)=@in={0x2, 0x0, @loopback=0x7f000001}, 0x10, &(0x7f0000000640), 0x0, &(0x7f0000000700)}, 0x8000) sendmsg(r0, &(0x7f00000002c0)={&(0x7f0000000440)=@in={0x2, 0x0, @loopback=0x7f000001}, 0x80, &(0x7f0000000400)=[{&(0x7f0000000680)="f6e676c7b563e65f", 0x8}], 0x1, &(0x7f0000000140)}, 0x20040000) 2018/04/07 07:40:34 executing program 7: r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='net/ip6_mr_vif\x00') preadv(r0, &(0x7f0000000a80)=[{&(0x7f0000001040)=""/4096, 0x1000}], 0x1, 0x0) 2018/04/07 07:40:34 executing program 3: syz_open_procfs(0x0, &(0x7f0000000080)="2f65786500000000000409004bddd9f191be10eebf000ee9ff0700000000000054fad2da75afe70b35a0fd6a1f0200f5ab26d7a071fb35331ce39c5a6568641006d7c0206a74e3332653000000000000") 2018/04/07 07:40:34 executing program 5: 2018/04/07 07:40:34 executing program 4: 2018/04/07 07:40:34 executing program 6: 2018/04/07 07:40:34 executing program 1: creat(&(0x7f00009e9ff8)='./file0\x00', 0x0) r0 = open(&(0x7f0000317000)='./file1\x00', 0x400000000040, 0x0) fcntl$setlease(r0, 0x400, 0x0) rename(&(0x7f0000fdbff8)='./file0\x00', &(0x7f0000887ff8)='./file1\x00') syzkaller login: [ 43.760881] ip (3692) used greatest stack depth: 54672 bytes left [ 45.182378] ip (3828) used greatest stack depth: 54200 bytes left [ 47.293768] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.359777] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.443147] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.504725] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.524599] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.631233] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.645694] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 47.815768] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 56.182593] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.274716] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.386782] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.398137] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.406511] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.518647] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.749308] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.792538] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 56.960566] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 56.966944] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 56.977613] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.054531] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.060792] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.074691] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.111978] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.119504] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.149673] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.225328] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.231587] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.240236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.271750] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.278735] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.306634] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.328481] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.345437] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.379907] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.577918] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.584278] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.599642] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.628380] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.639121] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.674229] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.183352] ================================================================== [ 58.190767] BUG: KMSAN: uninit-value in __udp4_lib_rcv+0x628/0x4740 [ 58.197177] CPU: 0 PID: 4943 Comm: syz-executor2 Not tainted 4.16.0+ #81 [ 58.204004] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.213353] Call Trace: [ 58.215930] [ 58.218081] dump_stack+0x185/0x1d0 [ 58.221711] ? __udp4_lib_rcv+0x628/0x4740 [ 58.225943] kmsan_report+0x142/0x240 [ 58.229743] __msan_warning_32+0x6c/0xb0 [ 58.233805] __udp4_lib_rcv+0x628/0x4740 [ 58.237869] ? raw_local_deliver+0x1462/0x1470 [ 58.242454] udp_rcv+0x5c/0x70 [ 58.245641] ? udp_v4_early_demux+0x1cd0/0x1cd0 [ 58.250314] ip_local_deliver_finish+0x6ed/0xd40 [ 58.255071] ip_local_deliver+0x43c/0x4e0 [ 58.259212] ? ip_local_deliver+0x4e0/0x4e0 [ 58.263532] ? ip_call_ra_chain+0x7b0/0x7b0 [ 58.267848] ip_rcv_finish+0x1253/0x16d0 [ 58.271908] ip_rcv+0x119d/0x16f0 [ 58.275354] ? ip_rcv+0x16f0/0x16f0 [ 58.278980] __netif_receive_skb_core+0x47cf/0x4a80 [ 58.283993] ? kmsan_set_origin_inline+0x6b/0x120 [ 58.288831] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0 [ 58.294626] ? ip_local_deliver_finish+0xd40/0xd40 [ 58.299556] process_backlog+0x62d/0xe20 [ 58.303615] ? rps_trigger_softirq+0x2f0/0x2f0 [ 58.308186] net_rx_action+0x7c1/0x1a70 [ 58.312160] ? net_tx_action+0xab0/0xab0 [ 58.316221] __do_softirq+0x56d/0x93d [ 58.320021] do_softirq_own_stack+0x2a/0x40 [ 58.324327] [ 58.326566] __local_bh_enable_ip+0x114/0x140 [ 58.331062] local_bh_enable+0x36/0x40 [ 58.334944] ip_finish_output2+0x124e/0x1380 [ 58.339354] ip_finish_output+0xcb0/0xff0 [ 58.343501] ip_output+0x502/0x5c0 [ 58.347035] ? ip_mc_finish_output+0x3b0/0x3b0 [ 58.351619] ? ip_finish_output+0xff0/0xff0 [ 58.355936] ip_send_skb+0x5f3/0x820 [ 58.359644] ? __ip_local_out+0x5b0/0x5b0 [ 58.363791] ip_push_pending_frames+0x105/0x170 [ 58.368459] raw_sendmsg+0x2960/0x3ed0 [ 58.372348] ? kmsan_internal_unpoison_shadow+0x83/0xe0 [ 58.377729] ? compat_raw_ioctl+0x100/0x100 [ 58.382049] inet_sendmsg+0x48d/0x740 [ 58.385846] ? security_socket_sendmsg+0x9e/0x210 [ 58.390694] ? inet_getname+0x500/0x500 [ 58.394671] ___sys_sendmsg+0xec0/0x1310 [ 58.398733] ? __fdget+0x4e/0x60 [ 58.402114] SYSC_sendmsg+0x2a3/0x3d0 [ 58.405921] SyS_sendmsg+0x54/0x80 [ 58.409458] do_syscall_64+0x309/0x430 [ 58.413343] ? ___sys_sendmsg+0x1310/0x1310 [ 58.417668] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 58.422849] RIP: 0033:0x455259 [ 58.426027] RSP: 002b:00007f035817fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e 2018/04/07 07:40:51 executing program 3: 2018/04/07 07:40:51 executing program 3: r0 = socket$inet6(0x10, 0x3, 0x0) sendmsg(r0, &(0x7f0000002fc8)={&(0x7f0000010ff4)=@nl=@kern={0x10}, 0x80, &(0x7f0000002000)=[{&(0x7f000000dfaa)="5500000019007fafb72d1cb2a4a280930a06000000a843dc91052369390009002f000000000000001900050000000000000000081338d54400009b84136ef75afb83de448daa7227c43ab8220000060cec4fab91d4", 0x55}], 0x1, &(0x7f0000002000)}, 0x0) [ 58.433730] RAX: ffffffffffffffda RBX: 00007f03581806d4 RCX: 0000000000455259 [ 58.440993] RDX: 0000000020040000 RSI: 00000000200002c0 RDI: 0000000000000013 [ 58.448253] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 58.455515] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 58.462774] R13: 00000000000004cc R14: 00000000006fa3c0 R15: 0000000000000000 [ 58.470040] [ 58.471653] Uninit was stored to memory at: [ 58.475977] kmsan_internal_chain_origin+0x12b/0x210 [ 58.481074] kmsan_memcpy_origins+0x11d/0x170 [ 58.485566] __msan_memcpy+0x19f/0x1f0 [ 58.489452] skb_copy_bits+0x63a/0xdb0 [ 58.493338] __pskb_pull_tail+0x483/0x22e0 [ 58.497570] __udp4_lib_rcv+0x55f/0x4740 [ 58.501622] udp_rcv+0x5c/0x70 [ 58.504809] ip_local_deliver_finish+0x6ed/0xd40 [ 58.509558] ip_local_deliver+0x43c/0x4e0 [ 58.513699] ip_rcv_finish+0x1253/0x16d0 [ 58.517753] ip_rcv+0x119d/0x16f0 [ 58.521207] __netif_receive_skb_core+0x47cf/0x4a80 [ 58.526217] process_backlog+0x62d/0xe20 [ 58.530270] net_rx_action+0x7c1/0x1a70 [ 58.534241] __do_softirq+0x56d/0x93d [ 58.538024] Uninit was created at: [ 58.541558] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 58.546565] kmsan_alloc_page+0x82/0xe0 [ 58.550536] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 58.555289] alloc_pages_current+0x6b5/0x970 [ 58.559709] skb_page_frag_refill+0x3ba/0x5e0 [ 58.564200] sk_page_frag_refill+0xa4/0x340 [ 58.568519] __ip_append_data+0x107e/0x3d10 [ 58.572837] ip_append_data+0x2fb/0x440 [ 58.576812] raw_sendmsg+0x287b/0x3ed0 [ 58.580698] inet_sendmsg+0x48d/0x740 [ 58.584496] ___sys_sendmsg+0xec0/0x1310 [ 58.588551] SYSC_sendmsg+0x2a3/0x3d0 [ 58.592344] SyS_sendmsg+0x54/0x80 [ 58.595880] do_syscall_64+0x309/0x430 [ 58.599765] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 58.604940] ================================================================== [ 58.612282] Disabling lock debugging due to kernel taint [ 58.617722] Kernel panic - not syncing: panic_on_warn set ... [ 58.617722] [ 58.625084] CPU: 0 PID: 4943 Comm: syz-executor2 Tainted: G B 4.16.0+ #81 [ 58.633213] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.642562] Call Trace: [ 58.645136] [ 58.647284] dump_stack+0x185/0x1d0 [ 58.650910] panic+0x39d/0x940 [ 58.654119] ? __udp4_lib_rcv+0x628/0x4740 [ 58.658355] kmsan_report+0x238/0x240 [ 58.662158] __msan_warning_32+0x6c/0xb0 [ 58.666214] __udp4_lib_rcv+0x628/0x4740 [ 58.670276] ? raw_local_deliver+0x1462/0x1470 [ 58.674860] udp_rcv+0x5c/0x70 [ 58.678051] ? udp_v4_early_demux+0x1cd0/0x1cd0 [ 58.682718] ip_local_deliver_finish+0x6ed/0xd40 [ 58.687470] ip_local_deliver+0x43c/0x4e0 [ 58.691618] ? ip_local_deliver+0x4e0/0x4e0 [ 58.695938] ? ip_call_ra_chain+0x7b0/0x7b0 [ 58.700259] ip_rcv_finish+0x1253/0x16d0 [ 58.704322] ip_rcv+0x119d/0x16f0 [ 58.707771] ? ip_rcv+0x16f0/0x16f0 [ 58.711416] __netif_receive_skb_core+0x47cf/0x4a80 [ 58.716434] ? kmsan_set_origin_inline+0x6b/0x120 [ 58.721278] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0 [ 58.727081] ? ip_local_deliver_finish+0xd40/0xd40 [ 58.732008] process_backlog+0x62d/0xe20 [ 58.736077] ? rps_trigger_softirq+0x2f0/0x2f0 [ 58.740657] net_rx_action+0x7c1/0x1a70 [ 58.744641] ? net_tx_action+0xab0/0xab0 [ 58.748721] __do_softirq+0x56d/0x93d [ 58.752527] do_softirq_own_stack+0x2a/0x40 [ 58.756837] [ 58.759072] __local_bh_enable_ip+0x114/0x140 [ 58.763610] local_bh_enable+0x36/0x40 [ 58.767493] ip_finish_output2+0x124e/0x1380 [ 58.771904] ip_finish_output+0xcb0/0xff0 [ 58.776054] ip_output+0x502/0x5c0 [ 58.779591] ? ip_mc_finish_output+0x3b0/0x3b0 [ 58.784175] ? ip_finish_output+0xff0/0xff0 [ 58.788492] ip_send_skb+0x5f3/0x820 [ 58.792211] ? __ip_local_out+0x5b0/0x5b0 [ 58.796358] ip_push_pending_frames+0x105/0x170 [ 58.801025] raw_sendmsg+0x2960/0x3ed0 [ 58.804923] ? kmsan_internal_unpoison_shadow+0x83/0xe0 [ 58.810309] ? compat_raw_ioctl+0x100/0x100 [ 58.814626] inet_sendmsg+0x48d/0x740 [ 58.818424] ? security_socket_sendmsg+0x9e/0x210 [ 58.823265] ? inet_getname+0x500/0x500 [ 58.827231] ___sys_sendmsg+0xec0/0x1310 [ 58.831293] ? __fdget+0x4e/0x60 [ 58.834660] SYSC_sendmsg+0x2a3/0x3d0 [ 58.838469] SyS_sendmsg+0x54/0x80 [ 58.842005] do_syscall_64+0x309/0x430 [ 58.845897] ? ___sys_sendmsg+0x1310/0x1310 [ 58.850224] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 58.855403] RIP: 0033:0x455259 [ 58.858585] RSP: 002b:00007f035817fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 58.866286] RAX: ffffffffffffffda RBX: 00007f03581806d4 RCX: 0000000000455259 [ 58.873552] RDX: 0000000020040000 RSI: 00000000200002c0 RDI: 0000000000000013 [ 58.880817] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 58.888083] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 58.895341] R13: 00000000000004cc R14: 00000000006fa3c0 R15: 0000000000000000 [ 58.903072] Dumping ftrace buffer: [ 58.906589] (ftrace buffer empty) [ 58.910267] Kernel Offset: disabled [ 58.913864] Rebooting in 86400 seconds..