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 '10.128.10.8' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 40.100499] ==================================================================
[ 40.107885] BUG: KMSAN: uninit-value in csum_partial+0x78e/0x850
[ 40.114007] CPU: 0 PID: 3575 Comm: syzkaller178574 Not tainted 4.16.0+ #83
[ 40.120992] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 40.130316] Call Trace:
[ 40.132872]
[ 40.135001] dump_stack+0x185/0x1d0
[ 40.138603] ? csum_partial+0x78e/0x850
[ 40.142551] kmsan_report+0x142/0x240
[ 40.146327] __msan_warning_32+0x6c/0xb0
[ 40.150365] csum_partial+0x78e/0x850
[ 40.154144] csum_partial_ext+0x89/0xa0
[ 40.158095] __skb_checksum+0x6d4/0x1010
[ 40.162131] ? skb_checksum+0x120/0x120
[ 40.166079] skb_checksum+0xec/0x120
[ 40.169769] ? skb_checksum+0x120/0x120
[ 40.173716] ? csum_partial_ext+0xa0/0xa0
[ 40.177841] __skb_checksum_complete+0x90/0x400
[ 40.182487] udp6_csum_init+0x94f/0x10c0
[ 40.186533] __udp6_lib_rcv+0x534/0x3920
[ 40.190573] ? ip6_input_finish+0x55c/0x2110
[ 40.195078] ? __msan_metadata_ptr_for_load_8+0x10/0x20
[ 40.200424] udpv6_rcv+0x5c/0x70
[ 40.203768] ? udp_v6_early_demux+0x11a0/0x11a0
[ 40.208415] ip6_input_finish+0xa62/0x2110
[ 40.212630] ? ip6table_filter_hook+0xb5/0xe0
[ 40.217104] ? __msan_metadata_ptr_for_load_2+0x10/0x20
[ 40.222448] ? ip6_input_finish+0x12a1/0x2110
[ 40.226926] ip6_input+0x294/0x320
[ 40.230452] ? ip6_input+0x320/0x320
[ 40.234148] ? ipv6_rcv+0x26d0/0x26d0
[ 40.237929] ipv6_rcv+0x20ec/0x26d0
[ 40.241534] ? local_bh_enable+0x40/0x40
[ 40.245588] __netif_receive_skb_core+0x47cf/0x4a80
[ 40.250583] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0
[ 40.256356] ? ip6_rcv_finish+0x4d0/0x4d0
[ 40.260479] process_backlog+0x62d/0xe20
[ 40.264518] ? rps_trigger_softirq+0x2f0/0x2f0
[ 40.269073] net_rx_action+0x7c1/0x1a70
[ 40.273028] ? net_tx_action+0xab0/0xab0
[ 40.277064] __do_softirq+0x56d/0x93d
[ 40.280841] do_softirq_own_stack+0x2a/0x40
[ 40.285131]
[ 40.287344] __local_bh_enable_ip+0x114/0x140
[ 40.291814] local_bh_enable+0x36/0x40
[ 40.295678] ip6_finish_output2+0x1b6c/0x1f20
[ 40.300155] ip6_finish_output+0xb3f/0xc00
[ 40.304366] ip6_output+0x597/0x6c0
[ 40.307969] ? ip6_output+0x6c0/0x6c0
[ 40.311745] ? ac6_seq_show+0x200/0x200
[ 40.315702] ip6_local_out+0x573/0x640
[ 40.319571] ? __ip6_local_out+0x4f0/0x4f0
[ 40.323785] ip6_send_skb+0xfa/0x380
[ 40.327477] udp_v6_send_skb+0x116a/0x1880
[ 40.331724] udpv6_sendmsg+0x15f4/0x45b0
[ 40.335765] ? rw_copy_check_uvector+0x5af/0x6c0
[ 40.340499] ? rw_copy_check_uvector+0x643/0x6c0
[ 40.345240] ? ip_copy_metadata+0xac0/0xac0
[ 40.349557] ? udpv6_queue_rcv_skb+0x1c60/0x1c60
[ 40.354290] inet_sendmsg+0x48d/0x740
[ 40.358070] ? security_socket_sendmsg+0x9e/0x210
[ 40.362894] ? inet_getname+0x500/0x500
[ 40.366850] ___sys_sendmsg+0xec0/0x1310
[ 40.370901] ? __fdget+0x4e/0x60
[ 40.374244] ? __fget_light+0x56/0x710
[ 40.378107] ? __fdget+0x4e/0x60
[ 40.381451] ? __fget_light+0x1dc/0x710
[ 40.385407] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 40.390748] ? __fget_light+0x1f5/0x710
[ 40.394704] SYSC_sendmsg+0x2a3/0x3d0
[ 40.398484] SyS_sendmsg+0x54/0x80
[ 40.402000] do_syscall_64+0x309/0x430
[ 40.405877] ? ___sys_sendmsg+0x1310/0x1310
[ 40.410181] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 40.415347] RIP: 0033:0x440279
[ 40.418513] RSP: 002b:00007ffd345b1728 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
[ 40.426197] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279
[ 40.433442] RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000000000003
[ 40.440687] RBP: 00000000006ca018 R08: 0000000000007b3f R09: 0000000000007b3f
[ 40.447935] R10: 0000000000007b3f R11: 0000000000000217 R12: 0000000000401ba0
[ 40.455183] R13: 0000000000401c30 R14: 0000000000000000 R15: 0000000000000000
[ 40.462432]
[ 40.464077] Uninit was created at:
[ 40.467601] kmsan_alloc_meta_for_pages+0x161/0x3a0
[ 40.472590] kmsan_alloc_page+0x82/0xe0
[ 40.476542] __alloc_pages_nodemask+0xf5b/0x5dc0
[ 40.481277] alloc_pages_current+0x6b5/0x970
[ 40.485665] skb_page_frag_refill+0x3ba/0x5e0
[ 40.490138] sk_page_frag_refill+0xa4/0x340
[ 40.494438] __ip6_append_data+0x1a20/0x4bb0
[ 40.498823] ip6_append_data+0x40e/0x6b0
[ 40.502881] udpv6_sendmsg+0xfd5/0x45b0
[ 40.506838] inet_sendmsg+0x48d/0x740
[ 40.510614] ___sys_sendmsg+0xec0/0x1310
[ 40.514654] SYSC_sendmsg+0x2a3/0x3d0
[ 40.518433] SyS_sendmsg+0x54/0x80
[ 40.521950] do_syscall_64+0x309/0x430
[ 40.525814] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 40.530972] ==================================================================
[ 40.538302] Disabling lock debugging due to kernel taint
[ 40.543721] Kernel panic - not syncing: panic_on_warn set ...
[ 40.543721]
[ 40.551059] CPU: 0 PID: 3575 Comm: syzkaller178574 Tainted: G B 4.16.0+ #83
[ 40.559342] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 40.568672] Call Trace:
[ 40.571242]
[ 40.573372] dump_stack+0x185/0x1d0
[ 40.576974] panic+0x39d/0x940
[ 40.580155] ? csum_partial+0x78e/0x850
[ 40.584106] kmsan_report+0x238/0x240
[ 40.587888] __msan_warning_32+0x6c/0xb0
[ 40.591924] csum_partial+0x78e/0x850
[ 40.595701] csum_partial_ext+0x89/0xa0
[ 40.599653] __skb_checksum+0x6d4/0x1010
[ 40.603691] ? skb_checksum+0x120/0x120
[ 40.607644] skb_checksum+0xec/0x120
[ 40.611333] ? skb_checksum+0x120/0x120
[ 40.615280] ? csum_partial_ext+0xa0/0xa0
[ 40.619404] __skb_checksum_complete+0x90/0x400
[ 40.624050] udp6_csum_init+0x94f/0x10c0
[ 40.628096] __udp6_lib_rcv+0x534/0x3920
[ 40.632136] ? ip6_input_finish+0x55c/0x2110
[ 40.636534] ? __msan_metadata_ptr_for_load_8+0x10/0x20
[ 40.641882] udpv6_rcv+0x5c/0x70
[ 40.645225] ? udp_v6_early_demux+0x11a0/0x11a0
[ 40.649867] ip6_input_finish+0xa62/0x2110
[ 40.654080] ? ip6table_filter_hook+0xb5/0xe0
[ 40.658549] ? __msan_metadata_ptr_for_load_2+0x10/0x20
[ 40.663888] ? ip6_input_finish+0x12a1/0x2110
[ 40.668361] ip6_input+0x294/0x320
[ 40.671881] ? ip6_input+0x320/0x320
[ 40.675570] ? ipv6_rcv+0x26d0/0x26d0
[ 40.679344] ipv6_rcv+0x20ec/0x26d0
[ 40.682945] ? local_bh_enable+0x40/0x40
[ 40.686983] __netif_receive_skb_core+0x47cf/0x4a80
[ 40.691975] ? kmsan_internal_memset_shadow_inline+0xd0/0xd0
[ 40.697749] ? ip6_rcv_finish+0x4d0/0x4d0
[ 40.701873] process_backlog+0x62d/0xe20
[ 40.705912] ? rps_trigger_softirq+0x2f0/0x2f0
[ 40.710467] net_rx_action+0x7c1/0x1a70
[ 40.714419] ? net_tx_action+0xab0/0xab0
[ 40.718458] __do_softirq+0x56d/0x93d
[ 40.722235] do_softirq_own_stack+0x2a/0x40
[ 40.726539]
[ 40.728754] __local_bh_enable_ip+0x114/0x140
[ 40.733232] local_bh_enable+0x36/0x40
[ 40.737096] ip6_finish_output2+0x1b6c/0x1f20
[ 40.741572] ip6_finish_output+0xb3f/0xc00
[ 40.745782] ip6_output+0x597/0x6c0
[ 40.749383] ? ip6_output+0x6c0/0x6c0
[ 40.753159] ? ac6_seq_show+0x200/0x200
[ 40.757106] ip6_local_out+0x573/0x640
[ 40.760966] ? __ip6_local_out+0x4f0/0x4f0
[ 40.765178] ip6_send_skb+0xfa/0x380
[ 40.768872] udp_v6_send_skb+0x116a/0x1880
[ 40.773087] udpv6_sendmsg+0x15f4/0x45b0
[ 40.777126] ? rw_copy_check_uvector+0x5af/0x6c0
[ 40.781856] ? rw_copy_check_uvector+0x643/0x6c0
[ 40.786592] ? ip_copy_metadata+0xac0/0xac0
[ 40.790891] ? udpv6_queue_rcv_skb+0x1c60/0x1c60
[ 40.795621] inet_sendmsg+0x48d/0x740
[ 40.799395] ? security_socket_sendmsg+0x9e/0x210
[ 40.804212] ? inet_getname+0x500/0x500
[ 40.808164] ___sys_sendmsg+0xec0/0x1310
[ 40.812201] ? __fdget+0x4e/0x60
[ 40.815543] ? __fget_light+0x56/0x710
[ 40.819404] ? __fdget+0x4e/0x60
[ 40.822743] ? __fget_light+0x1dc/0x710
[ 40.826692] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 40.832030] ? __fget_light+0x1f5/0x710
[ 40.835980] SYSC_sendmsg+0x2a3/0x3d0
[ 40.839759] SyS_sendmsg+0x54/0x80
[ 40.843276] do_syscall_64+0x309/0x430
[ 40.847139] ? ___sys_sendmsg+0x1310/0x1310
[ 40.851437] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 40.856601] RIP: 0033:0x440279
[ 40.859764] RSP: 002b:00007ffd345b1728 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
[ 40.867444] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279
[ 40.874689] RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000000000003
[ 40.881939] RBP: 00000000006ca018 R08: 0000000000007b3f R09: 0000000000007b3f
[ 40.889185] R10: 0000000000007b3f R11: 0000000000000217 R12: 0000000000401ba0
[ 40.896431] R13: 0000000000401c30 R14: 0000000000000000 R15: 0000000000000000
[ 40.904073] Dumping ftrace buffer:
[ 40.907584] (ftrace buffer empty)
[ 40.911266] Kernel Offset: disabled
[ 40.914872] Rebooting in 86400 seconds..