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-1,10.128.15.195' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   53.420267] ------------[ cut here ]------------
[   53.425072] WARNING: CPU: 0 PID: 2981 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   53.433098] Kernel panic - not syncing: panic_on_warn set ...
[   53.433098] 
[   53.440437] CPU: 0 PID: 2981 Comm: syzkaller930434 Not tainted 4.14.0-rc4+ #80
[   53.447767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.457110] Call Trace:
[   53.459679]  dump_stack+0x194/0x257
[   53.463281]  ? arch_local_irq_restore+0x53/0x53
[   53.467933]  panic+0x1e4/0x417
[   53.471097]  ? __warn+0x1d9/0x1d9
[   53.474517]  ? show_regs_print_info+0x65/0x65
[   53.478999]  ? kmalloc_slab+0x5d/0x70
[   53.482772]  __warn+0x1c4/0x1d9
[   53.486021]  ? kmalloc_slab+0x5d/0x70
[   53.489795]  report_bug+0x211/0x2d0
[   53.493403]  fixup_bug+0x40/0x90
[   53.496742]  do_trap+0x260/0x390
[   53.500085]  do_error_trap+0x120/0x390
[   53.503947]  ? do_trap+0x390/0x390
[   53.507460]  ? kmalloc_slab+0x5d/0x70
[   53.511242]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   53.516064]  do_invalid_op+0x1b/0x20
[   53.519753]  invalid_op+0x18/0x20
[   53.523177] RIP: 0010:kmalloc_slab+0x5d/0x70
[   53.527553] RSP: 0018:ffff8801ce75f4b0 EFLAGS: 00010246
[   53.532890] RAX: 0000000000000000 RBX: ffff8801ce75f748 RCX: 0000000000000007
[   53.540139] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   53.547379] RBP: ffff8801ce75f4b0 R08: ffff8801c16c0380 R09: ffff8801ce75fb10
[   53.554628] R10: ffff8801ceaae180 R11: 0000000000000000 R12: ffff8801ce75fab0
[   53.561874] R13: ffff8801ce75fb10 R14: 00000000014080c0 R15: ffff8801d06d47c0
[   53.569137]  __kmalloc+0x25/0x760
[   53.572566]  ? inet6_dump_ifaddr+0x30/0x30
[   53.576770]  ? ip6_setup_cork+0x1e8/0x15c0
[   53.580981]  ip6_setup_cork+0x1e8/0x15c0
[   53.585022]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   53.590279]  ip6_make_skb+0x282/0x530
[   53.594050]  ? ip_reply_glue_bits+0xb0/0xb0
[   53.598343]  ? ip6_push_pending_frames+0xe0/0xe0
[   53.603070]  ? ip6_dst_hoplimit+0x10d/0x420
[   53.607365]  ? ip6_route_output_flags+0x1f1/0x2b0
[   53.612192]  ? __lock_is_held+0xbc/0x140
[   53.616239]  ? ip6_dst_hoplimit+0xc1/0x420
[   53.620446]  ? ip6_find_1stfragopt+0x240/0x240
[   53.625005]  udpv6_sendmsg+0x2769/0x3380
[   53.629038]  ? ip_reply_glue_bits+0xb0/0xb0
[   53.633343]  ? udpv6_setsockopt+0x80/0x80
[   53.637462]  ? find_held_lock+0x39/0x1d0
[   53.641505]  ? lock_downgrade+0x990/0x990
[   53.645623]  ? lock_downgrade+0x990/0x990
[   53.649742]  ? lock_release+0xd70/0xd70
[   53.653699]  ? do_raw_spin_trylock+0x190/0x190
[   53.658258]  ? __local_bh_enable_ip+0x9d/0x160
[   53.662811]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   53.667799]  ? release_sock+0x1d4/0x2a0
[   53.671749]  ? _raw_spin_unlock_bh+0x30/0x40
[   53.676128]  ? release_sock+0x1d4/0x2a0
[   53.680083]  ? udp_v6_get_port+0x9c/0xc0
[   53.684137]  inet_sendmsg+0x11f/0x5e0
[   53.687907]  ? inet_sendmsg+0x11f/0x5e0
[   53.691850]  ? __might_sleep+0x95/0x190
[   53.695796]  ? inet_recvmsg+0x5f0/0x5f0
[   53.699743]  ? selinux_socket_sendmsg+0x36/0x40
[   53.704387]  ? security_socket_sendmsg+0x89/0xb0
[   53.709112]  ? inet_recvmsg+0x5f0/0x5f0
[   53.713060]  sock_sendmsg+0xca/0x110
[   53.716748]  SYSC_sendto+0x358/0x5a0
[   53.720435]  ? SYSC_connect+0x480/0x480
[   53.724392]  ? mm_fault_error+0x2c0/0x2c0
[   53.728513]  ? ipv6_setsockopt+0xa8/0x150
[   53.732642]  ? __do_page_fault+0xd60/0xd60
[   53.736861]  ? lockdep_sys_exit+0x47/0xf0
[   53.740980]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   53.745796]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   53.750785]  SyS_sendto+0x40/0x50
[   53.754212]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   53.758935] RIP: 0033:0x43fea9
[   53.762094] RSP: 002b:00007ffd1ad46368 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   53.769773] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   53.777012] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   53.784266] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c
[   53.791506] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   53.798754] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   53.806142] Dumping ftrace buffer:
[   53.809690]    (ftrace buffer empty)
[   53.813374] Kernel Offset: disabled
[   53.816980] Rebooting in 86400 seconds..