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-386-3,10.128.15.234' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   44.182860] ------------[ cut here ]------------
[   44.187692] WARNING: CPU: 1 PID: 2987 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   44.195735] Kernel panic - not syncing: panic_on_warn set ...
[   44.195735] 
[   44.203069] CPU: 1 PID: 2987 Comm: syzkaller578687 Not tainted 4.14.0-rc4+ #40
[   44.210400] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.219722] Call Trace:
[   44.222285]  dump_stack+0x194/0x257
[   44.225885]  ? arch_local_irq_restore+0x53/0x53
[   44.230537]  panic+0x1e4/0x417
[   44.233700]  ? __warn+0x1d9/0x1d9
[   44.237123]  ? show_regs_print_info+0x65/0x65
[   44.241602]  ? kmalloc_slab+0x5d/0x70
[   44.245372]  __warn+0x1c4/0x1d9
[   44.248624]  ? kmalloc_slab+0x5d/0x70
[   44.252397]  report_bug+0x211/0x2d0
[   44.256005]  fixup_bug+0x40/0x90
[   44.259342]  do_trap+0x260/0x390
[   44.262684]  do_error_trap+0x120/0x390
[   44.266547]  ? do_trap+0x390/0x390
[   44.270059]  ? kmalloc_slab+0x5d/0x70
[   44.273833]  ? lock_release+0xd70/0xd70
[   44.277786]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.282608]  do_invalid_op+0x1b/0x20
[   44.286295]  invalid_op+0x18/0x20
[   44.289717] RIP: 0010:kmalloc_slab+0x5d/0x70
[   44.294093] RSP: 0018:ffff8801d5b6f310 EFLAGS: 00010246
[   44.299432] RAX: 0000000000000000 RBX: ffff8801d5b6f5a8 RCX: 0000000000000007
[   44.306674] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff
[   44.313916] RBP: ffff8801d5b6f310 R08: ffff8801d9151c40 R09: ffff8801d5b6f970
[   44.321158] R10: ffff8801ce5cc4c0 R11: 0000000000000000 R12: ffff8801d5b6f910
[   44.328401] R13: ffff8801d5b6f970 R14: 00000000014080c0 R15: ffff8801d3ed17c0
[   44.335666]  __kmalloc+0x25/0x760
[   44.339095]  ? __ipv6_dev_get_saddr+0x4f0/0x4f0
[   44.343734]  ? ip6_setup_cork+0x1e8/0x15c0
[   44.347946]  ip6_setup_cork+0x1e8/0x15c0
[   44.351985]  ? __ip6_append_data.isra.43+0x32b0/0x32b0
[   44.357244]  ip6_make_skb+0x282/0x530
[   44.361020]  ? ip_reply_glue_bits+0xb0/0xb0
[   44.365317]  ? ip6_push_pending_frames+0xe0/0xe0
[   44.370043]  ? ip6_dst_hoplimit+0x10d/0x420
[   44.374337]  ? ip6_route_output_flags+0x1f1/0x2b0
[   44.379163]  ? __lock_is_held+0xbc/0x140
[   44.383209]  ? ip6_dst_hoplimit+0xc1/0x420
[   44.387433]  ? ip6_find_1stfragopt+0x240/0x240
[   44.391995]  udpv6_sendmsg+0x2769/0x3380
[   44.396029]  ? ip_reply_glue_bits+0xb0/0xb0
[   44.400334]  ? udpv6_setsockopt+0x80/0x80
[   44.404465]  ? lock_downgrade+0x990/0x990
[   44.408585]  ? lock_downgrade+0x990/0x990
[   44.412702]  ? lock_release+0xd70/0xd70
[   44.416668]  ? __local_bh_enable_ip+0x9d/0x160
[   44.421223]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   44.426211]  ? release_sock+0x1d4/0x2a0
[   44.430164]  ? _raw_spin_unlock_bh+0x30/0x40
[   44.434542]  ? release_sock+0x1d4/0x2a0
[   44.438498]  ? udp_v6_get_port+0x9c/0xc0
[   44.442539]  inet_sendmsg+0x11f/0x5e0
[   44.446311]  ? inet_sendmsg+0x11f/0x5e0
[   44.450257]  ? __might_sleep+0x95/0x190
[   44.454212]  ? inet_recvmsg+0x5f0/0x5f0
[   44.458163]  ? selinux_socket_sendmsg+0x36/0x40
[   44.462802]  ? security_socket_sendmsg+0x89/0xb0
[   44.467529]  ? inet_recvmsg+0x5f0/0x5f0
[   44.471477]  sock_sendmsg+0xca/0x110
[   44.475165]  SYSC_sendto+0x358/0x5a0
[   44.478854]  ? SYSC_connect+0x480/0x480
[   44.482828]  ? __handle_mm_fault+0x39c0/0x39c0
[   44.487381]  ? vmacache_find+0x5f/0x280
[   44.491335]  ? up_read+0x1a/0x40
[   44.494683]  ? __do_page_fault+0x3d6/0xd60
[   44.498900]  SyS_sendto+0x40/0x50
[   44.502326]  ? SyS_getpeername+0x30/0x30
[   44.506360]  do_fast_syscall_32+0x3f2/0xf05
[   44.510661]  ? do_int80_syscall_32+0x940/0x940
[   44.515216]  ? kasan_check_read+0x11/0x20
[   44.519338]  ? syscall_return_slowpath+0x510/0x510
[   44.524240]  ? SyS_rt_sigaction+0x94/0x1b0
[   44.528449]  ? lockdep_sys_exit+0x47/0xf0
[   44.532568]  ? retint_user+0x18/0x20
[   44.536260]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.541080]  entry_SYSENTER_compat+0x51/0x60
[   44.545459] RIP: 0023:0xf7fe7c79
[   44.548825] RSP: 002b:00000000ffb45c0c EFLAGS: 00000282 ORIG_RAX: 0000000000000171
[   44.556506] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020b3efff
[   44.563748] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4
[   44.570989] RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000
[   44.578231] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   44.585472] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   44.592901] Dumping ftrace buffer:
[   44.596457]    (ftrace buffer empty)
[   44.600140] Kernel Offset: disabled
[   44.603745] Rebooting in 86400 seconds..