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-next-kasan-gce-5,10.128.0.2' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   41.122960] ------------[ cut here ]------------
[   41.127758] WARNING: CPU: 0 PID: 2986 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   41.135862] Kernel panic - not syncing: panic_on_warn set ...
[   41.135862] 
[   41.143197] CPU: 0 PID: 2986 Comm: syzkaller600477 Not tainted 4.14.0-rc2-next-20170929+ #32
[   41.151738] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.161059] Call Trace:
[   41.163620]  dump_stack+0x194/0x257
[   41.167220]  ? arch_local_irq_restore+0x53/0x53
[   41.171871]  panic+0x1e4/0x41c
[   41.175032]  ? refcount_error_report+0x214/0x214
[   41.179755]  ? show_regs_print_info+0x65/0x65
[   41.184236]  ? kmalloc_slab+0x5d/0x70
[   41.188006]  __warn+0x1c4/0x1e0
[   41.191254]  ? kmalloc_slab+0x5d/0x70
[   41.195028]  report_bug+0x211/0x2d0
[   41.198633]  fixup_bug+0x40/0x90
[   41.201969]  do_trap+0x260/0x390
[   41.205310]  do_error_trap+0x120/0x390
[   41.209173]  ? do_trap+0x390/0x390
[   41.212682]  ? kmalloc_slab+0x5d/0x70
[   41.216452]  ? lock_release+0xd70/0xd70
[   41.220405]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   41.225225]  do_invalid_op+0x1b/0x20
[   41.228906]  invalid_op+0x18/0x20
[   41.232327] RIP: 0010:kmalloc_slab+0x5d/0x70
[   41.236702] RSP: 0018:ffff8801cdd074b0 EFLAGS: 00010246
[   41.242042] RAX: 0000000000000000 RBX: ffff8801cdd07748 RCX: 0000000000000007
[   41.249280] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   41.256521] RBP: ffff8801cdd074b0 R08: ffff8801d000a1c0 R09: ffff8801cdd07b10
[   41.263759] R10: ffff8801ce1b2300 R11: 0000000000000000 R12: ffff8801cdd07ab0
[   41.270997] R13: ffff8801cdd07b10 R14: 00000000014080c0 R15: ffff8801cf2a67c0
[   41.278261]  __kmalloc+0x25/0x760
[   41.281690]  ? __ipv6_dev_get_saddr+0x4f0/0x4f0
[   41.286331]  ? ip6_setup_cork+0x1e8/0x15c0
[   41.290541]  ip6_setup_cork+0x1e8/0x15c0
[   41.294578]  ? __ip6_append_data.isra.43+0x32b0/0x32b0
[   41.299834]  ip6_make_skb+0x282/0x530
[   41.303605]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.307906]  ? ip6_push_pending_frames+0xe0/0xe0
[   41.312629]  ? ip6_dst_hoplimit+0x10d/0x420
[   41.316920]  ? ip6_route_output_flags+0x1f1/0x2b0
[   41.321740]  ? __lock_is_held+0xbc/0x140
[   41.325783]  ? ip6_dst_hoplimit+0xc1/0x420
[   41.329987]  ? ip6_find_1stfragopt+0x240/0x240
[   41.334546]  udpv6_sendmsg+0x2769/0x3380
[   41.338578]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.342883]  ? udpv6_setsockopt+0x80/0x80
[   41.346997]  ? find_held_lock+0x39/0x1d0
[   41.351038]  ? lock_downgrade+0x990/0x990
[   41.355155]  ? lock_downgrade+0x990/0x990
[   41.359274]  ? lock_release+0xd70/0xd70
[   41.363229]  ? do_raw_spin_trylock+0x190/0x190
[   41.367786]  ? __local_bh_enable_ip+0x9d/0x160
[   41.372345]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.377330]  ? release_sock+0x1d4/0x2a0
[   41.381280]  ? _raw_spin_unlock_bh+0x30/0x40
[   41.385663]  ? release_sock+0x1d4/0x2a0
[   41.389619]  ? udp_v6_get_port+0x9c/0xc0
[   41.393658]  inet_sendmsg+0x11f/0x5e0
[   41.397427]  ? inet_sendmsg+0x11f/0x5e0
[   41.401372]  ? __might_sleep+0x95/0x190
[   41.405320]  ? inet_recvmsg+0x5f0/0x5f0
[   41.409268]  ? selinux_socket_sendmsg+0x36/0x40
[   41.413927]  ? security_socket_sendmsg+0x89/0xb0
[   41.418655]  ? inet_recvmsg+0x5f0/0x5f0
[   41.422601]  sock_sendmsg+0xca/0x110
[   41.426286]  SYSC_sendto+0x358/0x5a0
[   41.429975]  ? SYSC_connect+0x480/0x480
[   41.433930]  ? mm_fault_error+0x2c0/0x2c0
[   41.438052]  ? ipv6_setsockopt+0xa8/0x150
[   41.442181]  ? __do_page_fault+0xd60/0xd60
[   41.446406]  ? lockdep_sys_exit+0x47/0xf0
[   41.450524]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   41.455340]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.460329]  SyS_sendto+0x40/0x50
[   41.463756]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   41.468483] RIP: 0033:0x43fea9
[   41.471643] RSP: 002b:00007ffd50b077f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   41.479323] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   41.486568] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   41.493805] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   41.501045] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810
[   41.508291] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000
[   41.516041] Dumping ftrace buffer:
[   41.519616]    (ftrace buffer empty)
[   41.523298] Kernel Offset: disabled
[   41.526904] Rebooting in 86400 seconds..