INIT: Entering runlevel: 2
[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 30.905276] ==================================================================
[ 30.912679] BUG: KMSAN: uninit-value in tcp_v4_rcv+0xc5f/0x6750
[ 30.918721] CPU: 1 PID: 3565 Comm: syzkaller430900 Not tainted 4.16.0+ #81
[ 30.925705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 30.935039] Call Trace:
[ 30.937596]
[ 30.939727] dump_stack+0x185/0x1d0
[ 30.943330] ? tcp_v4_rcv+0xc5f/0x6750
[ 30.947202] kmsan_report+0x142/0x240
[ 30.950988] __msan_warning_32+0x6c/0xb0
[ 30.955032] tcp_v4_rcv+0xc5f/0x6750
[ 30.958723] ? sock_queue_rcv_skb+0xf9/0x130
[ 30.963107] ? raw_rcv+0x680/0x730
[ 30.966625] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 30.971963] ? raw_local_deliver+0x1462/0x1470
[ 30.976528] ? ip_local_deliver_finish+0x4a5/0xd40
[ 30.981433] ? tcp_filter+0x270/0x270
[ 30.985209] ip_local_deliver_finish+0x6ed/0xd40
[ 30.989942] ip_local_deliver+0x43c/0x4e0
[ 30.994187] ? ip_local_deliver+0x4e0/0x4e0
[ 30.998493] ? ip_call_ra_chain+0x7b0/0x7b0
[ 31.002793] ip_rcv_finish+0x1253/0x16d0
[ 31.006840] ip_rcv+0x119d/0x16f0
[ 31.010278] ? ip_rcv+0x16f0/0x16f0
[ 31.013886] __netif_receive_skb_core+0x47cf/0x4a80
[ 31.018884] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0
[ 31.024661] ? ip_local_deliver_finish+0xd40/0xd40
[ 31.029568] process_backlog+0x62d/0xe20
[ 31.033606] ? rps_trigger_softirq+0x2f0/0x2f0
[ 31.038165] net_rx_action+0x7c1/0x1a70
[ 31.042128] ? net_tx_action+0xab0/0xab0
[ 31.046167] __do_softirq+0x56d/0x93d
[ 31.049943] do_softirq_own_stack+0x2a/0x40
[ 31.054247]
[ 31.056465] __local_bh_enable_ip+0x114/0x140
[ 31.060936] local_bh_enable+0x36/0x40
[ 31.064800] ip_finish_output2+0x124e/0x1380
[ 31.069187] ip_finish_output+0xcb0/0xff0
[ 31.073319] ip_output+0x502/0x5c0
[ 31.076835] ? ip_mc_finish_output+0x3b0/0x3b0
[ 31.081420] ? ip_finish_output+0xff0/0xff0
[ 31.085718] ip_send_skb+0x5f3/0x820
[ 31.089416] ? __ip_local_out+0x5b0/0x5b0
[ 31.093545] ip_push_pending_frames+0x105/0x170
[ 31.098207] raw_sendmsg+0x2960/0x3ed0
[ 31.102096] ? __msan_metadata_ptr_for_store_8+0x13/0x20
[ 31.107556] ? compat_raw_ioctl+0x100/0x100
[ 31.111866] inet_sendmsg+0x48d/0x740
[ 31.115645] ? security_socket_sendmsg+0x9e/0x210
[ 31.120462] ? inet_getname+0x500/0x500
[ 31.124411] SYSC_sendto+0x6c3/0x7e0
[ 31.128116] SyS_sendto+0x8a/0xb0
[ 31.131547] do_syscall_64+0x309/0x430
[ 31.135410] ? SYSC_getpeername+0x560/0x560
[ 31.139709] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 31.144874] RIP: 0033:0x440149
[ 31.148037] RSP: 002b:00007fffd882f4d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 31.155725] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440149
[ 31.162979] RDX: 0000000000000028 RSI: 0000000020000100 RDI: 0000000000000003
[ 31.170227] RBP: 00000000006ca018 R08: 00000000200001c0 R09: 0000000000000010
[ 31.177473] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401a70
[ 31.184718] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000
[ 31.191965]
[ 31.193569] Uninit was stored to memory at:
[ 31.197874] kmsan_internal_chain_origin+0x12b/0x210
[ 31.202955] kmsan_memcpy_origins+0x11d/0x170
[ 31.207436] __msan_memcpy+0x19f/0x1f0
[ 31.211311] skb_copy_bits+0x63a/0xdb0
[ 31.215174] __pskb_pull_tail+0x483/0x22e0
[ 31.219388] tcp_v4_rcv+0xc09/0x6750
[ 31.223078] ip_local_deliver_finish+0x6ed/0xd40
[ 31.227811] ip_local_deliver+0x43c/0x4e0
[ 31.231939] ip_rcv_finish+0x1253/0x16d0
[ 31.235985] ip_rcv+0x119d/0x16f0
[ 31.239414] __netif_receive_skb_core+0x47cf/0x4a80
[ 31.244404] process_backlog+0x62d/0xe20
[ 31.248446] net_rx_action+0x7c1/0x1a70
[ 31.252407] __do_softirq+0x56d/0x93d
[ 31.256178] Uninit was created at:
[ 31.259695] kmsan_alloc_meta_for_pages+0x161/0x3a0
[ 31.264686] kmsan_alloc_page+0x82/0xe0
[ 31.268636] __alloc_pages_nodemask+0xf5b/0x5dc0
[ 31.273364] alloc_pages_current+0x6b5/0x970
[ 31.277746] skb_page_frag_refill+0x3ba/0x5e0
[ 31.282218] sk_page_frag_refill+0xa4/0x340
[ 31.286514] __ip_append_data+0x107e/0x3d10
[ 31.290810] ip_append_data+0x2fb/0x440
[ 31.294759] raw_sendmsg+0x287b/0x3ed0
[ 31.298770] inet_sendmsg+0x48d/0x740
[ 31.303156] SYSC_sendto+0x6c3/0x7e0
[ 31.306843] SyS_sendto+0x8a/0xb0
[ 31.310282] do_syscall_64+0x309/0x430
[ 31.314149] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 31.319307] ==================================================================
[ 31.326636] Disabling lock debugging due to kernel taint
[ 31.332061] Kernel panic - not syncing: panic_on_warn set ...
[ 31.332061]
[ 31.339402] CPU: 1 PID: 3565 Comm: syzkaller430900 Tainted: G B 4.16.0+ #81
[ 31.347694] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 31.357028] Call Trace:
[ 31.359589]
[ 31.361722] dump_stack+0x185/0x1d0
[ 31.365328] panic+0x39d/0x940
[ 31.368508] ? tcp_v4_rcv+0xc5f/0x6750
[ 31.372371] kmsan_report+0x238/0x240
[ 31.376148] __msan_warning_32+0x6c/0xb0
[ 31.380192] tcp_v4_rcv+0xc5f/0x6750
[ 31.383883] ? sock_queue_rcv_skb+0xf9/0x130
[ 31.388268] ? raw_rcv+0x680/0x730
[ 31.391790] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 31.397131] ? raw_local_deliver+0x1462/0x1470
[ 31.401696] ? ip_local_deliver_finish+0x4a5/0xd40
[ 31.406604] ? tcp_filter+0x270/0x270
[ 31.410381] ip_local_deliver_finish+0x6ed/0xd40
[ 31.415115] ip_local_deliver+0x43c/0x4e0
[ 31.419243] ? ip_local_deliver+0x4e0/0x4e0
[ 31.423542] ? ip_call_ra_chain+0x7b0/0x7b0
[ 31.427837] ip_rcv_finish+0x1253/0x16d0
[ 31.431877] ip_rcv+0x119d/0x16f0
[ 31.435316] ? ip_rcv+0x16f0/0x16f0
[ 31.438932] __netif_receive_skb_core+0x47cf/0x4a80
[ 31.443926] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0
[ 31.449706] ? ip_local_deliver_finish+0xd40/0xd40
[ 31.454617] process_backlog+0x62d/0xe20
[ 31.458659] ? rps_trigger_softirq+0x2f0/0x2f0
[ 31.463213] net_rx_action+0x7c1/0x1a70
[ 31.467165] ? net_tx_action+0xab0/0xab0
[ 31.471203] __do_softirq+0x56d/0x93d
[ 31.474984] do_softirq_own_stack+0x2a/0x40
[ 31.479279]
[ 31.481502] __local_bh_enable_ip+0x114/0x140
[ 31.485984] local_bh_enable+0x36/0x40
[ 31.489854] ip_finish_output2+0x124e/0x1380
[ 31.494247] ip_finish_output+0xcb0/0xff0
[ 31.498373] ip_output+0x502/0x5c0
[ 31.501884] ? ip_mc_finish_output+0x3b0/0x3b0
[ 31.506442] ? ip_finish_output+0xff0/0xff0
[ 31.510737] ip_send_skb+0x5f3/0x820
[ 31.514428] ? __ip_local_out+0x5b0/0x5b0
[ 31.518554] ip_push_pending_frames+0x105/0x170
[ 31.523203] raw_sendmsg+0x2960/0x3ed0
[ 31.527074] ? __msan_metadata_ptr_for_store_8+0x13/0x20
[ 31.532508] ? compat_raw_ioctl+0x100/0x100
[ 31.536805] inet_sendmsg+0x48d/0x740
[ 31.540583] ? security_socket_sendmsg+0x9e/0x210
[ 31.545405] ? inet_getname+0x500/0x500
[ 31.549358] SYSC_sendto+0x6c3/0x7e0
[ 31.553061] SyS_sendto+0x8a/0xb0
[ 31.556505] do_syscall_64+0x309/0x430
[ 31.560386] ? SYSC_getpeername+0x560/0x560
[ 31.564684] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 31.569847] RIP: 0033:0x440149
[ 31.573008] RSP: 002b:00007fffd882f4d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 31.580700] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440149
[ 31.587951] RDX: 0000000000000028 RSI: 0000000020000100 RDI: 0000000000000003
[ 31.595210] RBP: 00000000006ca018 R08: 00000000200001c0 R09: 0000000000000010
[ 31.602463] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401a70
[ 31.609709] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000
[ 31.617420] Dumping ftrace buffer:
[ 31.620940] (ftrace buffer empty)
[ 31.624626] Kernel Offset: disabled
[ 31.628230] Rebooting in 86400 seconds..