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-4,10.128.15.200' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   51.223870] ------------[ cut here ]------------
[   51.228671] WARNING: CPU: 0 PID: 2980 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   51.236774] Kernel panic - not syncing: panic_on_warn set ...
[   51.236774] 
[   51.244113] CPU: 0 PID: 2980 Comm: syzkaller575127 Not tainted 4.14.0-rc4-next-20171009+ #33
[   51.252656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.261981] Call Trace:
[   51.264543]  dump_stack+0x194/0x257
[   51.268147]  ? arch_local_irq_restore+0x53/0x53
[   51.272805]  panic+0x1e4/0x41c
[   51.275971]  ? refcount_error_report+0x214/0x214
[   51.280698]  ? show_regs_print_info+0x65/0x65
[   51.285188]  ? kmalloc_slab+0x5d/0x70
[   51.288958]  __warn+0x1c4/0x1e0
[   51.292207]  ? kmalloc_slab+0x5d/0x70
[   51.295980]  report_bug+0x211/0x2d0
[   51.299585]  fixup_bug+0x40/0x90
[   51.302925]  do_trap+0x260/0x390
[   51.306271]  do_error_trap+0x120/0x390
[   51.310133]  ? do_trap+0x390/0x390
[   51.313647]  ? kmalloc_slab+0x5d/0x70
[   51.317429]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   51.322250]  do_invalid_op+0x1b/0x20
[   51.325940]  invalid_op+0x18/0x20
[   51.329364] RIP: 0010:kmalloc_slab+0x5d/0x70
[   51.333740] RSP: 0018:ffff8801d61274b0 EFLAGS: 00010246
[   51.339076] RAX: 0000000000000000 RBX: ffff8801d6127748 RCX: 0000000000000007
[   51.346316] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   51.353557] RBP: ffff8801d61274b0 R08: ffff8801d3cb9c40 R09: ffff8801d6127b10
[   51.360798] R10: ffff8801ceb041c0 R11: 0000000000000000 R12: ffff8801d6127ab0
[   51.368038] R13: ffff8801d6127b10 R14: 00000000014080c0 R15: ffff8801cea0f7c0
[   51.375303]  __kmalloc+0x25/0x760
[   51.378737]  ? inet6_dump_ifaddr+0x30/0x30
[   51.382940]  ? ip6_setup_cork+0x1e8/0x15c0
[   51.387149]  ip6_setup_cork+0x1e8/0x15c0
[   51.391186]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   51.396443]  ip6_make_skb+0x282/0x530
[   51.400216]  ? ip_reply_glue_bits+0xb0/0xb0
[   51.404513]  ? ip6_push_pending_frames+0xe0/0xe0
[   51.409239]  ? ip6_dst_hoplimit+0x10d/0x420
[   51.413530]  ? ip6_route_output_flags+0x1f1/0x2b0
[   51.418353]  ? __lock_is_held+0xbc/0x140
[   51.422397]  ? ip6_dst_hoplimit+0xc1/0x420
[   51.426601]  ? ip6_find_1stfragopt+0x240/0x240
[   51.431162]  udpv6_sendmsg+0x2769/0x3380
[   51.435197]  ? ip_reply_glue_bits+0xb0/0xb0
[   51.439500]  ? udpv6_setsockopt+0x80/0x80
[   51.443616]  ? find_held_lock+0x39/0x1d0
[   51.447660]  ? lock_downgrade+0x990/0x990
[   51.451785]  ? lock_downgrade+0x990/0x990
[   51.455903]  ? lock_release+0xd70/0xd70
[   51.459861]  ? do_raw_spin_trylock+0x190/0x190
[   51.464421]  ? __local_bh_enable_ip+0x9d/0x160
[   51.468974]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   51.473961]  ? release_sock+0x1d4/0x2a0
[   51.477910]  ? _raw_spin_unlock_bh+0x30/0x40
[   51.482288]  ? release_sock+0x1d4/0x2a0
[   51.486243]  ? udp_v6_get_port+0x9c/0xc0
[   51.490282]  inet_sendmsg+0x11f/0x5e0
[   51.494053]  ? inet_sendmsg+0x11f/0x5e0
[   51.497998]  ? __might_sleep+0x95/0x190
[   51.501945]  ? inet_recvmsg+0x5f0/0x5f0
[   51.505895]  ? selinux_socket_sendmsg+0x36/0x40
[   51.510536]  ? security_socket_sendmsg+0x89/0xb0
[   51.515261]  ? inet_recvmsg+0x5f0/0x5f0
[   51.519210]  sock_sendmsg+0xca/0x110
[   51.522900]  SYSC_sendto+0x358/0x5a0
[   51.526588]  ? SYSC_connect+0x480/0x480
[   51.530543]  ? mm_fault_error+0x2c0/0x2c0
[   51.534665]  ? ipv6_setsockopt+0xa8/0x150
[   51.538796]  ? __do_page_fault+0xd60/0xd60
[   51.543019]  ? lockdep_sys_exit+0x47/0xf0
[   51.547136]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   51.551951]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   51.556947]  SyS_sendto+0x40/0x50
[   51.560379]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   51.565104] RIP: 0033:0x43fea9
[   51.568266] RSP: 002b:00007ffd9a373c38 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   51.575949] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   51.583192] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   51.590433] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   51.597674] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   51.604914] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   51.612309] Dumping ftrace buffer:
[   51.615872]    (ftrace buffer empty)
[   51.619557] Kernel Offset: disabled
[   51.623162] Rebooting in 86400 seconds..