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-7,10.128.15.199' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   41.716627] ------------[ cut here ]------------
[   41.721432] WARNING: CPU: 0 PID: 2987 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   41.729471] Kernel panic - not syncing: panic_on_warn set ...
[   41.729471] 
[   41.736814] CPU: 0 PID: 2987 Comm: syzkaller956715 Not tainted 4.14.0-rc4+ #80
[   41.744143] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.753477] Call Trace:
[   41.756041]  dump_stack+0x194/0x257
[   41.759643]  ? arch_local_irq_restore+0x53/0x53
[   41.764294]  panic+0x1e4/0x417
[   41.767458]  ? __warn+0x1d9/0x1d9
[   41.770883]  ? show_regs_print_info+0x65/0x65
[   41.775363]  ? kmalloc_slab+0x5d/0x70
[   41.779132]  __warn+0x1c4/0x1d9
[   41.782382]  ? kmalloc_slab+0x5d/0x70
[   41.786156]  report_bug+0x211/0x2d0
[   41.789761]  fixup_bug+0x40/0x90
[   41.793098]  do_trap+0x260/0x390
[   41.796442]  do_error_trap+0x120/0x390
[   41.800303]  ? do_trap+0x390/0x390
[   41.803817]  ? kmalloc_slab+0x5d/0x70
[   41.807601]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   41.812426]  do_invalid_op+0x1b/0x20
[   41.816110]  invalid_op+0x18/0x20
[   41.819532] RIP: 0010:kmalloc_slab+0x5d/0x70
[   41.823908] RSP: 0018:ffff8801ce57f4b0 EFLAGS: 00010246
[   41.829243] RAX: 0000000000000000 RBX: ffff8801ce57f748 RCX: 0000000000000007
[   41.836481] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   41.843720] RBP: ffff8801ce57f4b0 R08: ffff8801d12d4540 R09: ffff8801ce57fb10
[   41.850967] R10: ffff8801ce9c8180 R11: 0000000000000000 R12: ffff8801ce57fab0
[   41.858205] R13: ffff8801ce57fb10 R14: 00000000014080c0 R15: ffff8801d07b07c0
[   41.865465]  __kmalloc+0x25/0x760
[   41.868892]  ? inet6_dump_ifaddr+0x30/0x30
[   41.873096]  ? ip6_setup_cork+0x1e8/0x15c0
[   41.877304]  ip6_setup_cork+0x1e8/0x15c0
[   41.881344]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   41.886602]  ip6_make_skb+0x282/0x530
[   41.890376]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.894669]  ? ip6_push_pending_frames+0xe0/0xe0
[   41.899393]  ? ip6_dst_hoplimit+0x10d/0x420
[   41.903687]  ? ip6_route_output_flags+0x1f1/0x2b0
[   41.908509]  ? __lock_is_held+0xbc/0x140
[   41.912551]  ? ip6_dst_hoplimit+0xc1/0x420
[   41.916754]  ? ip6_find_1stfragopt+0x240/0x240
[   41.921313]  udpv6_sendmsg+0x2769/0x3380
[   41.925347]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.929652]  ? udpv6_setsockopt+0x80/0x80
[   41.933769]  ? find_held_lock+0x39/0x1d0
[   41.937813]  ? lock_downgrade+0x990/0x990
[   41.941932]  ? lock_downgrade+0x990/0x990
[   41.946060]  ? lock_release+0xd70/0xd70
[   41.950025]  ? do_raw_spin_trylock+0x190/0x190
[   41.954582]  ? __local_bh_enable_ip+0x9d/0x160
[   41.959136]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.964123]  ? release_sock+0x1d4/0x2a0
[   41.968072]  ? _raw_spin_unlock_bh+0x30/0x40
[   41.972450]  ? release_sock+0x1d4/0x2a0
[   41.976404]  ? udp_v6_get_port+0x9c/0xc0
[   41.980443]  inet_sendmsg+0x11f/0x5e0
[   41.984214]  ? inet_sendmsg+0x11f/0x5e0
[   41.988159]  ? __might_sleep+0x95/0x190
[   41.992104]  ? inet_recvmsg+0x5f0/0x5f0
[   41.996067]  ? selinux_socket_sendmsg+0x36/0x40
[   42.000713]  ? security_socket_sendmsg+0x89/0xb0
[   42.005438]  ? inet_recvmsg+0x5f0/0x5f0
[   42.009384]  sock_sendmsg+0xca/0x110
[   42.013069]  SYSC_sendto+0x358/0x5a0
[   42.016758]  ? SYSC_connect+0x480/0x480
[   42.020715]  ? mm_fault_error+0x2c0/0x2c0
[   42.024836]  ? ipv6_setsockopt+0xa8/0x150
[   42.029515]  ? __do_page_fault+0xd60/0xd60
[   42.033734]  ? lockdep_sys_exit+0x47/0xf0
[   42.037854]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   42.042669]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   42.047657]  SyS_sendto+0x40/0x50
[   42.051084]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   42.055808] RIP: 0033:0x43fea9
[   42.058970] RSP: 002b:00007ffd04b03698 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   42.066650] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   42.073889] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   42.081128] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   42.088369] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   42.095609] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   42.103003] Dumping ftrace buffer:
[   42.106555]    (ftrace buffer empty)
[   42.110235] Kernel Offset: disabled
[   42.113926] Rebooting in 86400 seconds..