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-net-kasan-gce-4,10.128.15.218' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   87.917466] ------------[ cut here ]------------
[   87.922272] WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   87.930294] Kernel panic - not syncing: panic_on_warn set ...
[   87.930294] 
[   87.937630] CPU: 0 PID: 2985 Comm: syzkaller571172 Not tainted 4.14.0-rc4+ #80
[   87.944963] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   87.954288] Call Trace:
[   87.956850]  dump_stack+0x194/0x257
[   87.960451]  ? arch_local_irq_restore+0x53/0x53
[   87.965103]  panic+0x1e4/0x417
[   87.968268]  ? __warn+0x1d9/0x1d9
[   87.971692]  ? show_regs_print_info+0x65/0x65
[   87.976187]  ? kmalloc_slab+0x5d/0x70
[   87.979960]  __warn+0x1c4/0x1d9
[   87.983210]  ? kmalloc_slab+0x5d/0x70
[   87.986983]  report_bug+0x211/0x2d0
[   87.990589]  fixup_bug+0x40/0x90
[   87.993927]  do_trap+0x260/0x390
[   87.997270]  do_error_trap+0x120/0x390
[   88.001132]  ? do_trap+0x390/0x390
[   88.004645]  ? kmalloc_slab+0x5d/0x70
[   88.008429]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   88.013251]  do_invalid_op+0x1b/0x20
[   88.016938]  invalid_op+0x18/0x20
[   88.020362] RIP: 0010:kmalloc_slab+0x5d/0x70
[   88.024739] RSP: 0018:ffff8801ce7d74b0 EFLAGS: 00010246
[   88.030077] RAX: 0000000000000000 RBX: ffff8801ce7d7748 RCX: 0000000000000007
[   88.037318] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   88.044560] RBP: ffff8801ce7d74b0 R08: ffff8801cfcf1540 R09: ffff8801ce7d7b10
[   88.051801] R10: ffff8801cf29e600 R11: 0000000000000000 R12: ffff8801ce7d7ab0
[   88.059040] R13: ffff8801ce7d7b10 R14: 00000000014080c0 R15: ffff8801ce7847c0
[   88.066303]  __kmalloc+0x25/0x760
[   88.069735]  ? inet6_dump_ifaddr+0x30/0x30
[   88.073942]  ? ip6_setup_cork+0x1e8/0x15c0
[   88.078153]  ip6_setup_cork+0x1e8/0x15c0
[   88.082193]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   88.087451]  ip6_make_skb+0x282/0x530
[   88.091229]  ? ip_reply_glue_bits+0xb0/0xb0
[   88.095527]  ? ip6_push_pending_frames+0xe0/0xe0
[   88.100251]  ? ip6_dst_hoplimit+0x10d/0x420
[   88.104546]  ? ip6_route_output_flags+0x1f1/0x2b0
[   88.109370]  ? __lock_is_held+0xbc/0x140
[   88.113415]  ? ip6_dst_hoplimit+0xc1/0x420
[   88.117626]  ? ip6_find_1stfragopt+0x240/0x240
[   88.122192]  udpv6_sendmsg+0x2769/0x3380
[   88.126229]  ? ip_reply_glue_bits+0xb0/0xb0
[   88.130540]  ? udpv6_setsockopt+0x80/0x80
[   88.134658]  ? find_held_lock+0x39/0x1d0
[   88.138705]  ? lock_downgrade+0x990/0x990
[   88.142827]  ? lock_downgrade+0x990/0x990
[   88.146947]  ? lock_release+0xd70/0xd70
[   88.150907]  ? do_raw_spin_trylock+0x190/0x190
[   88.155466]  ? __local_bh_enable_ip+0x9d/0x160
[   88.160025]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   88.165013]  ? release_sock+0x1d4/0x2a0
[   88.168964]  ? _raw_spin_unlock_bh+0x30/0x40
[   88.173356]  ? release_sock+0x1d4/0x2a0
[   88.177311]  ? udp_v6_get_port+0x9c/0xc0
[   88.181350]  inet_sendmsg+0x11f/0x5e0
[   88.185119]  ? inet_sendmsg+0x11f/0x5e0
[   88.189066]  ? __might_sleep+0x95/0x190
[   88.193015]  ? inet_recvmsg+0x5f0/0x5f0
[   88.196964]  ? selinux_socket_sendmsg+0x36/0x40
[   88.201618]  ? security_socket_sendmsg+0x89/0xb0
[   88.206347]  ? inet_recvmsg+0x5f0/0x5f0
[   88.210294]  sock_sendmsg+0xca/0x110
[   88.213983]  SYSC_sendto+0x358/0x5a0
[   88.217678]  ? SYSC_connect+0x480/0x480
[   88.221638]  ? mm_fault_error+0x2c0/0x2c0
[   88.225796]  ? ipv6_setsockopt+0xa8/0x150
[   88.229928]  ? __do_page_fault+0xd60/0xd60
[   88.234145]  ? lockdep_sys_exit+0x47/0xf0
[   88.238264]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   88.243080]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   88.248074]  SyS_sendto+0x40/0x50
[   88.251504]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   88.256232] RIP: 0033:0x43fea9
[   88.259393] RSP: 002b:00007ffdd328ea08 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   88.267075] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   88.274318] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   88.281567] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   88.288811] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   88.296054] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   88.303785] Dumping ftrace buffer:
[   88.307363]    (ftrace buffer empty)
[   88.311046] Kernel Offset: disabled
[   88.314652] Rebooting in 86400 seconds..