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-5,10.128.15.230' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   40.545987] ------------[ cut here ]------------
[   40.546767] WARNING: CPU: 0 PID: 2989 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   40.547966] Kernel panic - not syncing: panic_on_warn set ...
[   40.547966] 
[   40.548954] CPU: 0 PID: 2989 Comm: syzkaller518330 Not tainted 4.14.0-rc5-next-20171018+ #36
[   40.550073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.551291] Call Trace:
[   40.551651]  dump_stack+0x194/0x257
[   40.552143]  ? arch_local_irq_restore+0x53/0x53
[   40.552773]  ? vsnprintf+0x1ed/0x1900
[   40.553311]  panic+0x1e4/0x41c
[   40.553775]  ? refcount_error_report+0x214/0x214
[   40.554411]  ? show_regs_print_info+0x65/0x65
[   40.555017]  ? __warn+0x1a9/0x1e0
[   40.555487]  ? kmalloc_slab+0x5d/0x70
[   40.555997]  __warn+0x1c4/0x1e0
[   40.556442]  ? kmalloc_slab+0x5d/0x70
[   40.556960]  report_bug+0x211/0x2d0
[   40.557460]  fixup_bug+0x40/0x90
[   40.557917]  do_trap+0x260/0x390
[   40.558380]  do_error_trap+0x120/0x390
[   40.558909]  ? do_trap+0x390/0x390
[   40.559387]  ? kmalloc_slab+0x5d/0x70
[   40.559947]  ? ipv6_dev_get_saddr+0x4ec/0x9f0
[   40.560553]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   40.561219]  do_invalid_op+0x1b/0x20
[   40.561719]  invalid_op+0x18/0x20
[   40.562185] RIP: 0010:kmalloc_slab+0x5d/0x70
[   40.562796] RSP: 0018:ffff8801d1f674b0 EFLAGS: 00010246
[   40.563537] RAX: 0000000000000000 RBX: ffff8801d1f67748 RCX: ffffffff843a9363
[   40.564490] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   40.565443] RBP: ffff8801d1f674b0 R08: ffff8801d9adfa80 R09: ffff8801d1f67b10
[   40.566410] R10: ffff8801d1f67678 R11: 0000000000000000 R12: ffff8801d1f67ab0
[   40.573648] R13: ffff8801d1f67b10 R14: 00000000014080c0 R15: ffff8801d95370c0
[   40.580897]  ? ip6_setup_cork+0x173/0x15c0
[   40.585105]  __kmalloc+0x25/0x760
[   40.588531]  ? inet6_dump_ifaddr+0x30/0x30
[   40.592733]  ? ip6_setup_cork+0x1e8/0x15c0
[   40.596938]  ip6_setup_cork+0x1e8/0x15c0
[   40.600974]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   40.606217]  ? ip6_pol_route_output+0x4c/0x60
[   40.610677]  ? ip6_pol_route_input+0x70/0x70
[   40.615058]  ip6_make_skb+0x282/0x530
[   40.618831]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.623123]  ? ip6_push_pending_frames+0xe0/0xe0
[   40.627844]  ? ip6_dst_hoplimit+0x26c/0x420
[   40.632133]  ? lock_downgrade+0x990/0x990
[   40.636258]  ? __lock_is_held+0xb6/0x140
[   40.640298]  ? ip6_dst_hoplimit+0xc1/0x420
[   40.644502]  ? ip6_find_1stfragopt+0x240/0x240
[   40.649058]  udpv6_sendmsg+0x2769/0x3380
[   40.653090]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.657393]  ? udpv6_setsockopt+0x80/0x80
[   40.663533]  ? reacquire_held_locks+0x1fd/0x3d0
[   40.668170]  ? reacquire_held_locks+0x1fd/0x3d0
[   40.672813]  ? find_held_lock+0x35/0x1d0
[   40.676853]  ? release_sock+0x1d4/0x2a0
[   40.680795]  ? lock_downgrade+0x990/0x990
[   40.684913]  ? lock_downgrade+0x990/0x990
[   40.689029]  ? do_raw_spin_trylock+0x190/0x190
[   40.693583]  ? __local_bh_enable_ip+0x9d/0x160
[   40.698131]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.703114]  ? release_sock+0x1d4/0x2a0
[   40.707061]  ? _raw_spin_unlock_bh+0x30/0x40
[   40.711436]  ? release_sock+0x1d4/0x2a0
[   40.715385]  ? udp_v6_get_port+0x9c/0xc0
[   40.719426]  inet_sendmsg+0x11f/0x5e0
[   40.723192]  ? inet_sendmsg+0x11f/0x5e0
[   40.727136]  ? __might_sleep+0x95/0x190
[   40.731093]  ? inet_recvmsg+0x5f0/0x5f0
[   40.735041]  ? selinux_socket_sendmsg+0x36/0x40
[   40.739677]  ? security_socket_sendmsg+0x89/0xb0
[   40.744403]  ? inet_recvmsg+0x5f0/0x5f0
[   40.748345]  sock_sendmsg+0xca/0x110
[   40.752030]  SYSC_sendto+0x352/0x5a0
[   40.755715]  ? SYSC_connect+0x470/0x470
[   40.759665]  ? mm_fault_error+0x2c0/0x2c0
[   40.763786]  ? ipv6_setsockopt+0xa8/0x150
[   40.767908]  ? __do_page_fault+0xd60/0xd60
[   40.772120]  ? SyS_recv+0x40/0x40
[   40.775543]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   40.780353]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.785339]  SyS_sendto+0x40/0x50
[   40.788763]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   40.793485] RIP: 0033:0x43ff99
[   40.796641] RSP: 002b:00007ffd86cf5dc8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   40.804315] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043ff99
[   40.811552] RDX: 0000000000000000 RSI: 0000000020fd1000 RDI: 0000000000000003
[   40.818787] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   40.826022] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   40.833260] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   40.840974] Dumping ftrace buffer:
[   40.844523]    (ftrace buffer empty)
[   40.848200] Kernel Offset: disabled
[   40.851796] Rebooting in 86400 seconds..