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-3,10.128.0.45' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   22.588256] ------------[ cut here ]------------
[   22.593073] WARNING: CPU: 0 PID: 2977 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70
[   22.601206] Kernel panic - not syncing: panic_on_warn set ...
[   22.601206] 
[   22.608564] CPU: 0 PID: 2977 Comm: syzkaller935788 Not tainted 4.14.0-rc1+ #67
[   22.615900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   22.625225] Call Trace:
[   22.627792]  dump_stack+0x194/0x257
[   22.631397]  ? arch_local_irq_restore+0x53/0x53
[   22.636067]  panic+0x1e4/0x417
[   22.639233]  ? __warn+0x1d9/0x1d9
[   22.642656]  ? show_regs_print_info+0x65/0x65
[   22.647138]  ? kmalloc_slab+0x5d/0x70
[   22.650915]  __warn+0x1c4/0x1d9
[   22.654167]  ? kmalloc_slab+0x5d/0x70
[   22.657943]  report_bug+0x211/0x2d0
[   22.661549]  fixup_bug+0x40/0x90
[   22.664889]  do_trap+0x260/0x390
[   22.668235]  do_error_trap+0x120/0x390
[   22.672097]  ? do_trap+0x390/0x390
[   22.675608]  ? kmalloc_slab+0x5d/0x70
[   22.679381]  ? lock_release+0xd70/0xd70
[   22.683330]  ? ipv6_dev_get_saddr+0x2ae/0xa20
[   22.687799]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   22.692621]  do_invalid_op+0x1b/0x20
[   22.696309]  invalid_op+0x18/0x20
[   22.699731] RIP: 0010:kmalloc_slab+0x5d/0x70
[   22.704107] RSP: 0018:ffff8801ce56f4b0 EFLAGS: 00010246
[   22.709444] RAX: 0000000000000000 RBX: ffff8801ce56f748 RCX: 0000000000000007
[   22.716691] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   22.723938] RBP: ffff8801ce56f4b0 R08: ffff8801d68ec000 R09: ffff8801ce56fb10
[   22.731180] R10: ffff8801cf2985c0 R11: 0000000000000000 R12: ffff8801ce56fab0
[   22.738418] R13: ffff8801ce56fb10 R14: 00000000014080c0 R15: ffff8801ceb247c0
[   22.745681]  __kmalloc+0x25/0x760
[   22.749113]  ? __ipv6_dev_get_saddr+0x4f0/0x4f0
[   22.753755]  ? ip6_setup_cork+0x1e8/0x15c0
[   22.757964]  ip6_setup_cork+0x1e8/0x15c0
[   22.762004]  ? __ip6_append_data.isra.43+0x32b0/0x32b0
[   22.767266]  ip6_make_skb+0x282/0x530
[   22.771048]  ? ip_reply_glue_bits+0xb0/0xb0
[   22.775342]  ? ip6_push_pending_frames+0xe0/0xe0
[   22.780076]  ? ip6_dst_hoplimit+0x10d/0x420
[   22.784369]  ? ip6_route_output_flags+0x1f1/0x2b0
[   22.789193]  ? __lock_is_held+0xbc/0x140
[   22.793242]  ? ip6_dst_hoplimit+0xc1/0x420
[   22.797448]  ? ip6_find_1stfragopt+0x240/0x240
[   22.802016]  udpv6_sendmsg+0x2769/0x3380
[   22.806060]  ? ip_reply_glue_bits+0xb0/0xb0
[   22.810365]  ? udpv6_setsockopt+0x80/0x80
[   22.814485]  ? find_held_lock+0x39/0x1d0
[   22.818527]  ? lock_downgrade+0x990/0x990
[   22.822645]  ? lock_downgrade+0x990/0x990
[   22.826764]  ? lock_release+0xd70/0xd70
[   22.830721]  ? do_raw_spin_trylock+0x190/0x190
[   22.835280]  ? __local_bh_enable_ip+0x9d/0x160
[   22.839836]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   22.844824]  ? release_sock+0x1d4/0x2a0
[   22.848777]  ? _raw_spin_unlock_bh+0x30/0x40
[   22.853156]  ? release_sock+0x1d4/0x2a0
[   22.857113]  ? udp_v6_get_port+0x9c/0xc0
[   22.861156]  inet_sendmsg+0x11f/0x5e0
[   22.864926]  ? inet_sendmsg+0x11f/0x5e0
[   22.868871]  ? __might_sleep+0x95/0x190
[   22.872829]  ? inet_recvmsg+0x5f0/0x5f0
[   22.876778]  ? selinux_socket_sendmsg+0x36/0x40
[   22.881417]  ? security_socket_sendmsg+0x89/0xb0
[   22.886143]  ? inet_recvmsg+0x5f0/0x5f0
[   22.890093]  sock_sendmsg+0xca/0x110
[   22.893779]  SYSC_sendto+0x358/0x5a0
[   22.897467]  ? SYSC_connect+0x480/0x480
[   22.901412]  ? __handle_mm_fault+0x39c0/0x39c0
[   22.905976]  ? up_read+0x1a/0x40
[   22.909313]  ? __do_page_fault+0x35b/0xb60
[   22.913531]  ? __do_page_fault+0xb60/0xb60
[   22.917748]  ? lockdep_sys_exit+0x47/0xf0
[   22.921869]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   22.926690]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   22.931681]  SyS_sendto+0x40/0x50
[   22.935114]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   22.939840] RIP: 0033:0x43fea9
[   22.943001] RSP: 002b:00007ffd24c25288 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   22.950697] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   22.957937] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   22.965179] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   22.972802] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810
[   22.980052] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000
[   22.987887] Dumping ftrace buffer:
[   22.991460]    (ftrace buffer empty)
[   22.995142] Kernel Offset: disabled
[   22.998748] Rebooting in 86400 seconds..