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-kasan-gce-5,10.128.0.48' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   39.971621] ------------[ cut here ]------------
[   39.976416] WARNING: CPU: 0 PID: 2983 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   39.984407] Kernel panic - not syncing: panic_on_warn set ...
[   39.984407] 
[   39.991740] CPU: 0 PID: 2983 Comm: syzkaller383631 Not tainted 4.14.0-rc4+ #131
[   39.999153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.008476] Call Trace:
[   40.011036]  dump_stack+0x194/0x257
[   40.014637]  ? arch_local_irq_restore+0x53/0x53
[   40.019288]  panic+0x1e4/0x417
[   40.022451]  ? __warn+0x1d9/0x1d9
[   40.025873]  ? show_regs_print_info+0x65/0x65
[   40.030352]  ? kmalloc_slab+0x5d/0x70
[   40.034120]  __warn+0x1c4/0x1d9
[   40.037369]  ? kmalloc_slab+0x5d/0x70
[   40.041141]  report_bug+0x211/0x2d0
[   40.044748]  fixup_bug+0x40/0x90
[   40.048085]  do_trap+0x260/0x390
[   40.051428]  do_error_trap+0x120/0x390
[   40.055291]  ? do_trap+0x390/0x390
[   40.058801]  ? kmalloc_slab+0x5d/0x70
[   40.062574]  ? lock_release+0xd70/0xd70
[   40.066525]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   40.071343]  do_invalid_op+0x1b/0x20
[   40.075026]  invalid_op+0x18/0x20
[   40.078446] RIP: 0010:kmalloc_slab+0x5d/0x70
[   40.082821] RSP: 0018:ffff8801c03074b0 EFLAGS: 00010246
[   40.088294] RAX: 0000000000000000 RBX: ffff8801c0307748 RCX: 0000000000000007
[   40.095562] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   40.102806] RBP: ffff8801c03074b0 R08: ffff8801d7aa88c0 R09: ffff8801c0307b10
[   40.110047] R10: ffff8801ce4e62c0 R11: 0000000000000000 R12: ffff8801c0307ab0
[   40.117286] R13: ffff8801c0307b10 R14: 00000000014080c0 R15: ffff8801cf390000
[   40.124553]  __kmalloc+0x25/0x760
[   40.127984]  ? __ipv6_dev_get_saddr+0x4f0/0x4f0
[   40.132621]  ? ip6_setup_cork+0x1e8/0x15c0
[   40.136830]  ip6_setup_cork+0x1e8/0x15c0
[   40.140869]  ? __ip6_append_data.isra.43+0x32b0/0x32b0
[   40.146126]  ip6_make_skb+0x282/0x530
[   40.149902]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.154195]  ? ip6_push_pending_frames+0xe0/0xe0
[   40.158922]  ? ip6_dst_hoplimit+0x10d/0x420
[   40.163215]  ? ip6_route_output_flags+0x1f1/0x2b0
[   40.168041]  ? __lock_is_held+0xbc/0x140
[   40.172085]  ? ip6_dst_hoplimit+0xc1/0x420
[   40.176290]  ? ip6_find_1stfragopt+0x240/0x240
[   40.180850]  udpv6_sendmsg+0x2769/0x3380
[   40.184884]  ? ip_reply_glue_bits+0xb0/0xb0
[   40.189188]  ? udpv6_setsockopt+0x80/0x80
[   40.193305]  ? find_held_lock+0x39/0x1d0
[   40.197347]  ? lock_downgrade+0x990/0x990
[   40.201465]  ? lock_downgrade+0x990/0x990
[   40.205589]  ? lock_release+0xd70/0xd70
[   40.209544]  ? do_raw_spin_trylock+0x190/0x190
[   40.214104]  ? __local_bh_enable_ip+0x9d/0x160
[   40.218659]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.223645]  ? release_sock+0x1d4/0x2a0
[   40.227597]  ? _raw_spin_unlock_bh+0x30/0x40
[   40.231975]  ? release_sock+0x1d4/0x2a0
[   40.235933]  ? udp_v6_get_port+0x9c/0xc0
[   40.239971]  inet_sendmsg+0x11f/0x5e0
[   40.243741]  ? inet_sendmsg+0x11f/0x5e0
[   40.247686]  ? __might_sleep+0x95/0x190
[   40.251630]  ? inet_recvmsg+0x5f0/0x5f0
[   40.255577]  ? selinux_socket_sendmsg+0x36/0x40
[   40.260216]  ? security_socket_sendmsg+0x89/0xb0
[   40.264943]  ? inet_recvmsg+0x5f0/0x5f0
[   40.268892]  sock_sendmsg+0xca/0x110
[   40.272578]  SYSC_sendto+0x358/0x5a0
[   40.276267]  ? SYSC_connect+0x480/0x480
[   40.280224]  ? mm_fault_error+0x2c0/0x2c0
[   40.284349]  ? ipv6_setsockopt+0xa8/0x150
[   40.288476]  ? __do_page_fault+0xd60/0xd60
[   40.292695]  ? lockdep_sys_exit+0x47/0xf0
[   40.296816]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   40.301630]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.306619]  SyS_sendto+0x40/0x50
[   40.310050]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   40.314774] RIP: 0033:0x43fea9
[   40.317933] RSP: 002b:00007ffcdf478f28 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   40.325613] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   40.332853] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   40.340094] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   40.347336] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   40.354577] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   40.361963] Dumping ftrace buffer:
[   40.365516]    (ftrace buffer empty)
[   40.369197] Kernel Offset: disabled
[   40.372799] Rebooting in 86400 seconds..