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-7,10.128.0.12' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.821043] ------------[ cut here ]------------
[   28.821817] WARNING: CPU: 1 PID: 2989 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   28.823019] Kernel panic - not syncing: panic_on_warn set ...
[   28.823019] 
[   28.824016] CPU: 1 PID: 2989 Comm: syzkaller564952 Not tainted 4.14.0-rc5-next-20171018+ #36
[   28.825139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.826369] Call Trace:
[   28.826731]  dump_stack+0x194/0x257
[   28.827223]  ? arch_local_irq_restore+0x53/0x53
[   28.827851]  ? vsnprintf+0x1ed/0x1900
[   28.828370]  panic+0x1e4/0x41c
[   28.828815]  ? refcount_error_report+0x214/0x214
[   28.829446]  ? show_regs_print_info+0x65/0x65
[   28.830072]  ? retint_kernel+0x10/0x10
[   28.830606]  ? __warn+0x1a9/0x1e0
[   28.831079]  ? kmalloc_slab+0x5d/0x70
[   28.831589]  __warn+0x1c4/0x1e0
[   28.832032]  ? kmalloc_slab+0x5f/0x70
[   28.832541]  ? kmalloc_slab+0x5d/0x70
[   28.833053]  report_bug+0x211/0x2d0
[   28.833565]  fixup_bug+0x40/0x90
[   28.834023]  do_trap+0x260/0x390
[   28.834485]  do_error_trap+0x120/0x390
[   28.835011]  ? do_trap+0x390/0x390
[   28.835506]  ? kmalloc_slab+0x5d/0x70
[   28.836024]  ? ipv6_dev_get_saddr+0x4ec/0x9f0
[   28.836630]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   28.837279]  do_invalid_op+0x1b/0x20
[   28.837777]  invalid_op+0x18/0x20
[   28.838244] RIP: 0010:kmalloc_slab+0x5d/0x70
[   28.838852] RSP: 0018:ffff8801c0dcf4b0 EFLAGS: 00010246
[   28.839591] RAX: 0000000000000000 RBX: ffff8801c0dcf748 RCX: ffffffff843a9363
[   28.840543] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   28.843792] RBP: ffff8801c0dcf4b0 R08: ffff8801bff891c0 R09: ffff8801c0dcfb10
[   28.851030] R10: ffff8801c0dcf678 R11: 0000000000000000 R12: ffff8801c0dcfab0
[   28.858270] R13: ffff8801c0dcfb10 R14: 00000000014080c0 R15: ffff8801d2970880
[   28.865522]  ? ip6_setup_cork+0x173/0x15c0
[   28.869732]  __kmalloc+0x25/0x760
[   28.873663]  ? inet6_dump_ifaddr+0x30/0x30
[   28.877866]  ? ip6_setup_cork+0x1e8/0x15c0
[   28.882074]  ip6_setup_cork+0x1e8/0x15c0
[   28.886112]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   28.891364]  ? ip6_pol_route_output+0x4c/0x60
[   28.895826]  ? ip6_pol_route_input+0x70/0x70
[   28.900210]  ip6_make_skb+0x282/0x530
[   28.903982]  ? ip_reply_glue_bits+0xb0/0xb0
[   28.908274]  ? ip6_push_pending_frames+0xe0/0xe0
[   28.912998]  ? ip6_dst_hoplimit+0x26c/0x420
[   28.917290]  ? lock_downgrade+0x990/0x990
[   28.921414]  ? __lock_is_held+0xb6/0x140
[   28.925454]  ? ip6_dst_hoplimit+0xc1/0x420
[   28.929658]  ? ip6_find_1stfragopt+0x240/0x240
[   28.934212]  udpv6_sendmsg+0x2769/0x3380
[   28.938246]  ? ip_reply_glue_bits+0xb0/0xb0
[   28.942546]  ? udpv6_setsockopt+0x80/0x80
[   28.946667]  ? reacquire_held_locks+0x1fd/0x3d0
[   28.951304]  ? reacquire_held_locks+0x1fd/0x3d0
[   28.955944]  ? find_held_lock+0x35/0x1d0
[   28.959982]  ? release_sock+0x1d4/0x2a0
[   28.963923]  ? lock_downgrade+0x990/0x990
[   28.968035]  ? lock_downgrade+0x990/0x990
[   28.972153]  ? do_raw_spin_trylock+0x190/0x190
[   28.976709]  ? __local_bh_enable_ip+0x9d/0x160
[   28.981261]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   28.986244]  ? release_sock+0x1d4/0x2a0
[   28.990193]  ? _raw_spin_unlock_bh+0x30/0x40
[   28.994567]  ? release_sock+0x1d4/0x2a0
[   28.998515]  ? udp_v6_get_port+0x9c/0xc0
[   29.002551]  inet_sendmsg+0x11f/0x5e0
[   29.006315]  ? inet_sendmsg+0x11f/0x5e0
[   29.010258]  ? __might_sleep+0x95/0x190
[   29.014202]  ? inet_recvmsg+0x5f0/0x5f0
[   29.018148]  ? selinux_socket_sendmsg+0x36/0x40
[   29.022782]  ? security_socket_sendmsg+0x89/0xb0
[   29.027505]  ? inet_recvmsg+0x5f0/0x5f0
[   29.031450]  sock_sendmsg+0xca/0x110
[   29.035132]  SYSC_sendto+0x352/0x5a0
[   29.038815]  ? SYSC_connect+0x470/0x470
[   29.042769]  ? mm_fault_error+0x2c0/0x2c0
[   29.046887]  ? ipv6_setsockopt+0xa8/0x150
[   29.051008]  ? __do_page_fault+0xd60/0xd60
[   29.055220]  ? SyS_recv+0x40/0x40
[   29.058643]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   29.063454]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   29.068437]  SyS_sendto+0x40/0x50
[   29.071863]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   29.076586] RIP: 0033:0x440009
[   29.079743] RSP: 002b:00007fff67c75018 EFLAGS: 00000216 ORIG_RAX: 000000000000002c
[   29.087418] RAX: ffffffffffffffda RBX: 00000000006ccd60 RCX: 0000000000440009
[   29.094653] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000006
[   29.101891] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   29.109130] R10: 0000000000000000 R11: 0000000000000216 R12: 505daaef76b36d7c
[   29.116365] R13: 04a17b4203d90165 R14: 0000000000000000 R15: 0000000000000000
[   29.123766] Dumping ftrace buffer:
[   29.127311]    (ftrace buffer empty)
[   29.130990] Kernel Offset: disabled
[   29.134586] Rebooting in 86400 seconds..