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 '10.128.10.40' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.806818] ================================================================== [ 43.814243] BUG: KMSAN: uninit-value in lwtunnel_valid_encap_type_attr+0x29e/0x3e0 [ 43.821942] CPU: 0 PID: 4556 Comm: syz-executor789 Not tainted 4.16.0+ #87 [ 43.828945] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.838285] Call Trace: [ 43.840875] dump_stack+0x185/0x1d0 [ 43.844495] ? lwtunnel_valid_encap_type_attr+0x29e/0x3e0 [ 43.850029] kmsan_report+0x142/0x240 [ 43.853818] __msan_warning_32+0x6c/0xb0 [ 43.857871] lwtunnel_valid_encap_type_attr+0x29e/0x3e0 [ 43.863242] rtm_to_fib_config+0xc83/0x12e0 [ 43.867597] inet_rtm_newroute+0x121/0x340 [ 43.871865] ? fib_del_ifaddr+0x3a40/0x3a40 [ 43.876206] rtnetlink_rcv_msg+0xa32/0x1560 [ 43.880636] ? SyS_sendmsg+0x54/0x80 [ 43.884352] ? netlink_sendmsg+0x9a6/0x1310 [ 43.888663] ? ___sys_sendmsg+0xec0/0x1310 [ 43.892886] ? SYSC_sendmsg+0x2a3/0x3d0 [ 43.896934] ? SyS_sendmsg+0x54/0x80 [ 43.900636] ? do_syscall_64+0x309/0x430 [ 43.904683] ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.910033] ? __msan_poison_alloca+0x15c/0x1d0 [ 43.914708] ? _raw_spin_unlock_bh+0x57/0x70 [ 43.919102] ? __local_bh_enable_ip+0x3b/0x140 [ 43.923674] ? _raw_spin_unlock_bh+0x57/0x70 [ 43.928067] ? kmsan_set_origin_inline+0x6b/0x120 [ 43.932903] ? kmsan_set_origin+0x9e/0x160 [ 43.937143] netlink_rcv_skb+0x378/0x600 [ 43.941217] ? rtnetlink_bind+0x120/0x120 [ 43.945352] rtnetlink_rcv+0x50/0x60 [ 43.949060] netlink_unicast+0x166b/0x1740 [ 43.953313] ? rtnetlink_net_exit+0xa0/0xa0 [ 43.957621] netlink_sendmsg+0x1048/0x1310 [ 43.961844] ? netlink_getsockopt+0xc80/0xc80 [ 43.966333] ___sys_sendmsg+0xec0/0x1310 [ 43.970382] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 43.975736] ? __fdget+0x4e/0x60 [ 43.979101] SYSC_sendmsg+0x2a3/0x3d0 [ 43.982894] SyS_sendmsg+0x54/0x80 [ 43.986449] do_syscall_64+0x309/0x430 [ 43.990323] ? ___sys_sendmsg+0x1310/0x1310 [ 43.994632] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.999806] RIP: 0033:0x43fde9 [ 44.002986] RSP: 002b:00007ffd8d7c85a8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 44.013027] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fde9 [ 44.020297] RDX: 0000000000000000 RSI: 000000002000bfc8 RDI: 0000000000000003 [ 44.027597] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.034860] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401710 [ 44.042111] R13: 00000000004017a0 R14: 0000000000000000 R15: 0000000000000000 [ 44.049369] [ 44.050991] Uninit was created at: [ 44.054527] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 44.059639] kmsan_kmalloc+0x94/0x100 [ 44.063434] kmsan_slab_alloc+0x11/0x20 [ 44.067403] __kmalloc_node_track_caller+0xaed/0x11c0 [ 44.072593] __alloc_skb+0x2cf/0x9f0 [ 44.076298] netlink_sendmsg+0x9a6/0x1310 [ 44.080438] ___sys_sendmsg+0xec0/0x1310 [ 44.084484] SYSC_sendmsg+0x2a3/0x3d0 [ 44.088271] SyS_sendmsg+0x54/0x80 [ 44.091808] do_syscall_64+0x309/0x430 [ 44.095700] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.100870] ================================================================== [ 44.108224] Disabling lock debugging due to kernel taint [ 44.113661] Kernel panic - not syncing: panic_on_warn set ... [ 44.113661] [ 44.121201] CPU: 0 PID: 4556 Comm: syz-executor789 Tainted: G B 4.16.0+ #87 [ 44.129501] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.138837] Call Trace: [ 44.141418] dump_stack+0x185/0x1d0 [ 44.145043] panic+0x39d/0x940 [ 44.148248] ? lwtunnel_valid_encap_type_attr+0x29e/0x3e0 [ 44.153773] kmsan_report+0x238/0x240 [ 44.157567] __msan_warning_32+0x6c/0xb0 [ 44.161614] lwtunnel_valid_encap_type_attr+0x29e/0x3e0 [ 44.166984] rtm_to_fib_config+0xc83/0x12e0 [ 44.171296] inet_rtm_newroute+0x121/0x340 [ 44.175532] ? fib_del_ifaddr+0x3a40/0x3a40 [ 44.179856] rtnetlink_rcv_msg+0xa32/0x1560 [ 44.184170] ? SyS_sendmsg+0x54/0x80 [ 44.187874] ? netlink_sendmsg+0x9a6/0x1310 [ 44.192186] ? ___sys_sendmsg+0xec0/0x1310 [ 44.196420] ? SYSC_sendmsg+0x2a3/0x3d0 [ 44.200398] ? SyS_sendmsg+0x54/0x80 [ 44.204104] ? do_syscall_64+0x309/0x430 [ 44.208168] ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.213539] ? __msan_poison_alloca+0x15c/0x1d0 [ 44.218198] ? _raw_spin_unlock_bh+0x57/0x70 [ 44.222613] ? __local_bh_enable_ip+0x3b/0x140 [ 44.227181] ? _raw_spin_unlock_bh+0x57/0x70 [ 44.231575] ? kmsan_set_origin_inline+0x6b/0x120 [ 44.236408] ? kmsan_set_origin+0x9e/0x160 [ 44.240646] netlink_rcv_skb+0x378/0x600 [ 44.244699] ? rtnetlink_bind+0x120/0x120 [ 44.248847] rtnetlink_rcv+0x50/0x60 [ 44.252555] netlink_unicast+0x166b/0x1740 [ 44.256782] ? rtnetlink_net_exit+0xa0/0xa0 [ 44.261121] netlink_sendmsg+0x1048/0x1310 [ 44.265369] ? netlink_getsockopt+0xc80/0xc80 [ 44.269849] ___sys_sendmsg+0xec0/0x1310 [ 44.273909] ? do_huge_pmd_anonymous_page+0x19d5/0x2520 [ 44.279273] ? __fdget+0x4e/0x60 [ 44.282633] SYSC_sendmsg+0x2a3/0x3d0 [ 44.286418] SyS_sendmsg+0x54/0x80 [ 44.289942] do_syscall_64+0x309/0x430 [ 44.293813] ? ___sys_sendmsg+0x1310/0x1310 [ 44.298120] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.303290] RIP: 0033:0x43fde9 [ 44.306458] RSP: 002b:00007ffd8d7c85a8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 44.314150] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fde9 [ 44.321406] RDX: 0000000000000000 RSI: 000000002000bfc8 RDI: 0000000000000003 [ 44.328926] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.336204] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401710 [ 44.343463] R13: 00000000004017a0 R14: 0000000000000000 R15: 0000000000000000 [ 44.352497] Dumping ftrace buffer: [ 44.356033] (ftrace buffer empty) [ 44.359719] Kernel Offset: disabled [ 44.363327] Rebooting in 86400 seconds..