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 'ci-upstream-net-kasan-gce-1,10.128.15.229' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   40.391358] ------------[ cut here ]------------
[   40.396141] WARNING: CPU: 0 PID: 2986 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   40.404143] Kernel panic - not syncing: panic_on_warn set ...
[   40.404143] 
[   40.411476] CPU: 0 PID: 2986 Comm: syzkaller159590 Not tainted 4.14.0-rc4+ #80
[   40.418803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.428124] Call Trace:
[   40.430683]  dump_stack+0x194/0x257
[   40.434283]  ? arch_local_irq_restore+0x53/0x53
[   40.438934]  panic+0x1e4/0x417
[   40.442096]  ? __warn+0x1d9/0x1d9
[   40.445521]  ? show_regs_print_info+0x65/0x65
[   40.450000]  ? kmalloc_slab+0x5d/0x70
[   40.453770]  __warn+0x1c4/0x1d9
[   40.457019]  ? kmalloc_slab+0x5d/0x70
[   40.460792]  report_bug+0x211/0x2d0
[   40.464396]  fixup_bug+0x40/0x90
[   40.467734]  do_trap+0x260/0x390
[   40.471075]  do_error_trap+0x120/0x390
[   40.474937]  ? do_trap+0x390/0x390
[   40.478450]  ? kmalloc_slab+0x5d/0x70
[   40.482233]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   40.487052]  do_invalid_op+0x1b/0x20
[   40.490736]  invalid_op+0x18/0x20
[   40.494157] RIP: 0010:kmalloc_slab+0x5d/0x70
[   40.498533] RSP: 0018:ffff8801cebaf4b0 EFLAGS: 00010246
[   40.503868] RAX: 0000000000000000 RBX: ffff8801cebaf748 RCX: 0000000000000007
[   40.511108] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   40.518348] RBP: ffff8801cebaf4b0 R08: ffff8801d1dcf1c0 R09: ffff8801cebafb10
[   40.525589] R10: ffff8801ce46e340 R11: 0000000000000000 R12: ffff8801cebafab0
[   40.532828] R13: ffff8801cebafb10 R14: 00000000014080c0 R15: ffff8801cf5517c0
[   40.540087]  __kmalloc+0x25/0x760
[   40.543516]  ? inet6_dump_ifaddr+0x30/0x30
[   40.547718]  ? ip6_setup_cork+0x1e8/0x15c0
[   40.551927]  ip6_setup_cork+0x1e8/0x15c0
[   40.555966]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   40.561225]  ip6_make_skb+0x282/0x530
[   40.564998]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.569291]  ? ip6_push_pending_frames+0xe0/0xe0
[   40.574015]  ? ip6_dst_hoplimit+0x10d/0x420
[   40.578310]  ? ip6_route_output_flags+0x1f1/0x2b0
[   40.583137]  ? __lock_is_held+0xbc/0x140
[   40.587181]  ? ip6_dst_hoplimit+0xc1/0x420
[   40.591386]  ? ip6_find_1stfragopt+0x240/0x240
[   40.595945]  udpv6_sendmsg+0x2769/0x3380
[   40.599979]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.604285]  ? udpv6_setsockopt+0x80/0x80
[   40.608404]  ? find_held_lock+0x39/0x1d0
[   40.612452]  ? lock_downgrade+0x990/0x990
[   40.616570]  ? lock_downgrade+0x990/0x990
[   40.620687]  ? lock_release+0xd70/0xd70
[   40.624642]  ? do_raw_spin_trylock+0x190/0x190
[   40.629200]  ? __local_bh_enable_ip+0x9d/0x160
[   40.633754]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.638741]  ? release_sock+0x1d4/0x2a0
[   40.642693]  ? _raw_spin_unlock_bh+0x30/0x40
[   40.647072]  ? release_sock+0x1d4/0x2a0
[   40.651026]  ? udp_v6_get_port+0x9c/0xc0
[   40.655066]  inet_sendmsg+0x11f/0x5e0
[   40.658834]  ? inet_sendmsg+0x11f/0x5e0
[   40.662776]  ? __might_sleep+0x95/0x190
[   40.666720]  ? inet_recvmsg+0x5f0/0x5f0
[   40.670668]  ? selinux_socket_sendmsg+0x36/0x40
[   40.675306]  ? security_socket_sendmsg+0x89/0xb0
[   40.680031]  ? inet_recvmsg+0x5f0/0x5f0
[   40.683978]  sock_sendmsg+0xca/0x110
[   40.687663]  SYSC_sendto+0x358/0x5a0
[   40.691354]  ? SYSC_connect+0x480/0x480
[   40.695314]  ? mm_fault_error+0x2c0/0x2c0
[   40.699440]  ? ipv6_setsockopt+0xa8/0x150
[   40.703568]  ? __do_page_fault+0xd60/0xd60
[   40.707787]  ? lockdep_sys_exit+0x47/0xf0
[   40.711907]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   40.716723]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.721713]  SyS_sendto+0x40/0x50
[   40.725140]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   40.729865] RIP: 0033:0x43fea9
[   40.733025] RSP: 002b:00007ffc3d3684a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   40.740704] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   40.747942] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   40.755179] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   40.762423] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   40.769663] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   40.777373] Dumping ftrace buffer:
[   40.780919]    (ftrace buffer empty)
[   40.784601] Kernel Offset: disabled
[   40.788204] Rebooting in 86400 seconds..