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-3,10.128.0.42' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   50.518076] ------------[ cut here ]------------
[   50.522904] WARNING: CPU: 1 PID: 2984 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   50.531054] Kernel panic - not syncing: panic_on_warn set ...
[   50.531054] 
[   50.538388] CPU: 1 PID: 2984 Comm: syzkaller377986 Not tainted 4.14.0-rc4-next-20171009+ #33
[   50.546932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.556349] Call Trace:
[   50.558909]  dump_stack+0x194/0x257
[   50.562511]  ? arch_local_irq_restore+0x53/0x53
[   50.567163]  panic+0x1e4/0x41c
[   50.570328]  ? refcount_error_report+0x214/0x214
[   50.575056]  ? show_regs_print_info+0x65/0x65
[   50.579538]  ? kmalloc_slab+0x5d/0x70
[   50.583308]  __warn+0x1c4/0x1e0
[   50.586559]  ? kmalloc_slab+0x5d/0x70
[   50.590333]  report_bug+0x211/0x2d0
[   50.593939]  fixup_bug+0x40/0x90
[   50.597277]  do_trap+0x260/0x390
[   50.600621]  do_error_trap+0x120/0x390
[   50.604493]  ? do_trap+0x390/0x390
[   50.608009]  ? kmalloc_slab+0x5d/0x70
[   50.611794]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   50.616614]  do_invalid_op+0x1b/0x20
[   50.620301]  invalid_op+0x18/0x20
[   50.623723] RIP: 0010:kmalloc_slab+0x5d/0x70
[   50.628102] RSP: 0018:ffff8801ce74f4b0 EFLAGS: 00010246
[   50.633442] RAX: 0000000000000000 RBX: ffff8801ce74f748 RCX: 0000000000000007
[   50.640685] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   50.647928] RBP: ffff8801ce74f4b0 R08: ffff8801d540fa80 R09: ffff8801ce74fb10
[   50.655172] R10: ffff8801cf3e4300 R11: 0000000000000000 R12: ffff8801ce74fab0
[   50.662415] R13: ffff8801ce74fb10 R14: 00000000014080c0 R15: ffff8801ce6d47c0
[   50.669681]  __kmalloc+0x25/0x760
[   50.673118]  ? inet6_dump_ifaddr+0x30/0x30
[   50.677326]  ? ip6_setup_cork+0x1e8/0x15c0
[   50.681536]  ip6_setup_cork+0x1e8/0x15c0
[   50.685577]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   50.690837]  ip6_make_skb+0x282/0x530
[   50.694609]  ? retint_kernel+0x10/0x10
[   50.698468]  ? ip_reply_glue_bits+0xb0/0xb0
[   50.702768]  ? ip6_push_pending_frames+0xe0/0xe0
[   50.707494]  ? ip6_dst_hoplimit+0x10d/0x420
[   50.711801]  ? __lock_is_held+0xbc/0x140
[   50.715846]  ? ip6_dst_hoplimit+0xc1/0x420
[   50.720051]  ? ip6_find_1stfragopt+0x240/0x240
[   50.724616]  udpv6_sendmsg+0x2769/0x3380
[   50.728651]  ? ip_reply_glue_bits+0xb0/0xb0
[   50.732956]  ? udpv6_setsockopt+0x80/0x80
[   50.737075]  ? find_held_lock+0x39/0x1d0
[   50.741122]  ? lock_downgrade+0x990/0x990
[   50.745241]  ? lock_downgrade+0x990/0x990
[   50.749360]  ? lock_release+0xd70/0xd70
[   50.753317]  ? do_raw_spin_trylock+0x190/0x190
[   50.757875]  ? __local_bh_enable_ip+0x9d/0x160
[   50.762431]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   50.767420]  ? release_sock+0x1d4/0x2a0
[   50.771371]  ? _raw_spin_unlock_bh+0x30/0x40
[   50.775751]  ? release_sock+0x1d4/0x2a0
[   50.779707]  ? udp_v6_get_port+0x9c/0xc0
[   50.783747]  inet_sendmsg+0x11f/0x5e0
[   50.787519]  ? inet_sendmsg+0x11f/0x5e0
[   50.791464]  ? __might_sleep+0x95/0x190
[   50.795411]  ? inet_recvmsg+0x5f0/0x5f0
[   50.799360]  ? selinux_socket_sendmsg+0x36/0x40
[   50.804002]  ? security_socket_sendmsg+0x89/0xb0
[   50.808731]  ? inet_recvmsg+0x5f0/0x5f0
[   50.812681]  sock_sendmsg+0xca/0x110
[   50.816368]  SYSC_sendto+0x358/0x5a0
[   50.820059]  ? SYSC_connect+0x480/0x480
[   50.824014]  ? mm_fault_error+0x2c0/0x2c0
[   50.828136]  ? ipv6_setsockopt+0xa8/0x150
[   50.832264]  ? __do_page_fault+0xd60/0xd60
[   50.836482]  ? lockdep_sys_exit+0x47/0xf0
[   50.840600]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   50.845416]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   50.850408]  SyS_sendto+0x40/0x50
[   50.853837]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   50.858563] RIP: 0033:0x43fea9
[   50.861725] RSP: 002b:00007ffc6c1b20d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   50.869404] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   50.876643] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   50.883883] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   50.891124] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   50.898364] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   50.906149] Dumping ftrace buffer:
[   50.909706]    (ftrace buffer empty)
[   50.913388] Kernel Offset: disabled
[   50.916994] Rebooting in 86400 seconds..