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-5,10.128.15.234' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   54.449848] ------------[ cut here ]------------
[   54.454650] WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   54.462791] Kernel panic - not syncing: panic_on_warn set ...
[   54.462791] 
[   54.470133] CPU: 0 PID: 2985 Comm: syzkaller121514 Not tainted 4.14.0-rc4-next-20171009+ #33
[   54.478680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.488006] Call Trace:
[   54.490567]  dump_stack+0x194/0x257
[   54.494167]  ? arch_local_irq_restore+0x53/0x53
[   54.498821]  panic+0x1e4/0x41c
[   54.501985]  ? refcount_error_report+0x214/0x214
[   54.506711]  ? show_regs_print_info+0x65/0x65
[   54.511194]  ? kmalloc_slab+0x5d/0x70
[   54.514964]  __warn+0x1c4/0x1e0
[   54.518214]  ? kmalloc_slab+0x5d/0x70
[   54.521991]  report_bug+0x211/0x2d0
[   54.525596]  fixup_bug+0x40/0x90
[   54.528935]  do_trap+0x260/0x390
[   54.532282]  do_error_trap+0x120/0x390
[   54.536145]  ? do_trap+0x390/0x390
[   54.539661]  ? kmalloc_slab+0x5d/0x70
[   54.543446]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   54.548267]  do_invalid_op+0x1b/0x20
[   54.551953]  invalid_op+0x18/0x20
[   54.555375] RIP: 0010:kmalloc_slab+0x5d/0x70
[   54.559751] RSP: 0018:ffff8801d359f4b0 EFLAGS: 00010246
[   54.565091] RAX: 0000000000000000 RBX: ffff8801d359f748 RCX: 0000000000000007
[   54.572329] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   54.579573] RBP: ffff8801d359f4b0 R08: ffff8801cf47ae00 R09: ffff8801d359fb10
[   54.586820] R10: ffff8801ce82c080 R11: 0000000000000000 R12: ffff8801d359fab0
[   54.594062] R13: ffff8801d359fb10 R14: 00000000014080c0 R15: ffff8801c03077c0
[   54.601324]  __kmalloc+0x25/0x760
[   54.604757]  ? inet6_dump_ifaddr+0x30/0x30
[   54.608963]  ? ip6_setup_cork+0x1e8/0x15c0
[   54.613173]  ip6_setup_cork+0x1e8/0x15c0
[   54.617212]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   54.622474]  ip6_make_skb+0x282/0x530
[   54.626247]  ? ip_reply_glue_bits+0xb0/0xb0
[   54.630542]  ? ip6_push_pending_frames+0xe0/0xe0
[   54.635269]  ? ip6_dst_hoplimit+0x10d/0x420
[   54.639566]  ? ip6_route_output_flags+0x1f1/0x2b0
[   54.644393]  ? __lock_is_held+0xbc/0x140
[   54.648437]  ? ip6_dst_hoplimit+0xc1/0x420
[   54.652658]  ? ip6_find_1stfragopt+0x240/0x240
[   54.657217]  udpv6_sendmsg+0x2769/0x3380
[   54.661249]  ? ip_reply_glue_bits+0xb0/0xb0
[   54.665554]  ? udpv6_setsockopt+0x80/0x80
[   54.669671]  ? find_held_lock+0x39/0x1d0
[   54.673717]  ? lock_downgrade+0x990/0x990
[   54.677835]  ? lock_downgrade+0x990/0x990
[   54.681956]  ? lock_release+0xd70/0xd70
[   54.685915]  ? do_raw_spin_trylock+0x190/0x190
[   54.690478]  ? __local_bh_enable_ip+0x9d/0x160
[   54.695032]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   54.700019]  ? release_sock+0x1d4/0x2a0
[   54.703969]  ? _raw_spin_unlock_bh+0x30/0x40
[   54.708350]  ? release_sock+0x1d4/0x2a0
[   54.712305]  ? udp_v6_get_port+0x9c/0xc0
[   54.716343]  inet_sendmsg+0x11f/0x5e0
[   54.720114]  ? inet_sendmsg+0x11f/0x5e0
[   54.724058]  ? __might_sleep+0x95/0x190
[   54.728006]  ? inet_recvmsg+0x5f0/0x5f0
[   54.731953]  ? selinux_socket_sendmsg+0x36/0x40
[   54.736591]  ? security_socket_sendmsg+0x89/0xb0
[   54.741317]  ? inet_recvmsg+0x5f0/0x5f0
[   54.745262]  sock_sendmsg+0xca/0x110
[   54.748945]  SYSC_sendto+0x358/0x5a0
[   54.752631]  ? SYSC_connect+0x480/0x480
[   54.756586]  ? mm_fault_error+0x2c0/0x2c0
[   54.760712]  ? ipv6_setsockopt+0xa8/0x150
[   54.764839]  ? __do_page_fault+0xd60/0xd60
[   54.769053]  ? lockdep_sys_exit+0x47/0xf0
[   54.773170]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   54.777984]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   54.782972]  SyS_sendto+0x40/0x50
[   54.786397]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   54.791120] RIP: 0033:0x43fea9
[   54.794278] RSP: 002b:00007ffee6719088 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   54.801958] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   54.809200] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   54.816438] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   54.823685] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   54.830930] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   54.838323] Dumping ftrace buffer:
[   54.841908]    (ftrace buffer empty)
[   54.845596] Kernel Offset: disabled
[   54.849204] Rebooting in 86400 seconds..