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-mmots-kasan-gce-7,10.128.15.211' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   41.097162] ------------[ cut here ]------------
[   41.101967] WARNING: CPU: 1 PID: 2981 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   41.110125] Kernel panic - not syncing: panic_on_warn set ...
[   41.110125] 
[   41.117466] CPU: 1 PID: 2981 Comm: syzkaller973742 Not tainted 4.14.0-rc4-mm1+ #16
[   41.125140] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.134464] Call Trace:
[   41.137025]  dump_stack+0x194/0x257
[   41.140628]  ? arch_local_irq_restore+0x53/0x53
[   41.145281]  panic+0x1e4/0x41c
[   41.148444]  ? refcount_error_report+0x214/0x214
[   41.153169]  ? show_regs_print_info+0x65/0x65
[   41.157655]  ? kmalloc_slab+0x5d/0x70
[   41.161423]  __warn+0x1c4/0x1e0
[   41.164676]  ? kmalloc_slab+0x5d/0x70
[   41.168453]  report_bug+0x211/0x2d0
[   41.172057]  fixup_bug+0x40/0x90
[   41.175394]  do_trap+0x260/0x390
[   41.178736]  do_error_trap+0x120/0x390
[   41.182599]  ? do_trap+0x390/0x390
[   41.186111]  ? kmalloc_slab+0x5d/0x70
[   41.189893]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   41.194714]  do_invalid_op+0x1b/0x20
[   41.198398]  invalid_op+0x18/0x20
[   41.201821] RIP: 0010:kmalloc_slab+0x5d/0x70
[   41.206220] RSP: 0018:ffff8801d00bf4b0 EFLAGS: 00010246
[   41.211556] RAX: 0000000000000000 RBX: ffff8801d00bf748 RCX: 0000000000000007
[   41.218796] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   41.226036] RBP: ffff8801d00bf4b0 R08: ffff8801d512c1c0 R09: ffff8801d00bfb10
[   41.233279] R10: ffff8801cf3e85c0 R11: 0000000000000000 R12: ffff8801d00bfab0
[   41.240517] R13: ffff8801d00bfb10 R14: 00000000014080c0 R15: ffff8801cf612000
[   41.247777]  __kmalloc+0x25/0x760
[   41.251206]  ? inet6_dump_ifaddr+0x30/0x30
[   41.255409]  ? ip6_setup_cork+0x1e8/0x15c0
[   41.259622]  ip6_setup_cork+0x1e8/0x15c0
[   41.263661]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   41.268920]  ip6_make_skb+0x282/0x530
[   41.272693]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.276987]  ? ip6_push_pending_frames+0xe0/0xe0
[   41.281714]  ? ip6_dst_hoplimit+0x10d/0x420
[   41.286007]  ? ip6_route_output_flags+0x1f1/0x2b0
[   41.290834]  ? __lock_is_held+0xbc/0x140
[   41.294881]  ? ip6_dst_hoplimit+0xc1/0x420
[   41.299089]  ? ip6_find_1stfragopt+0x240/0x240
[   41.303652]  udpv6_sendmsg+0x2769/0x3380
[   41.307689]  ? ip_reply_glue_bits+0xb0/0xb0
[   41.311999]  ? udpv6_setsockopt+0x80/0x80
[   41.316122]  ? find_held_lock+0x39/0x1d0
[   41.320165]  ? lock_downgrade+0x990/0x990
[   41.324284]  ? lock_downgrade+0x990/0x990
[   41.328404]  ? lock_release+0xd70/0xd70
[   41.332359]  ? do_raw_spin_trylock+0x190/0x190
[   41.336918]  ? __local_bh_enable_ip+0x9d/0x160
[   41.341481]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.346469]  ? release_sock+0x1d4/0x2a0
[   41.350427]  ? _raw_spin_unlock_bh+0x30/0x40
[   41.354805]  ? release_sock+0x1d4/0x2a0
[   41.358761]  ? udp_v6_get_port+0x9c/0xc0
[   41.362798]  inet_sendmsg+0x11f/0x5e0
[   41.366565]  ? inet_sendmsg+0x11f/0x5e0
[   41.370508]  ? __might_sleep+0x95/0x190
[   41.374452]  ? inet_recvmsg+0x5f0/0x5f0
[   41.378408]  ? selinux_socket_sendmsg+0x36/0x40
[   41.383047]  ? security_socket_sendmsg+0x89/0xb0
[   41.387772]  ? inet_recvmsg+0x5f0/0x5f0
[   41.391717]  sock_sendmsg+0xca/0x110
[   41.395403]  SYSC_sendto+0x358/0x5a0
[   41.399090]  ? SYSC_connect+0x480/0x480
[   41.403049]  ? mm_fault_error+0x2c0/0x2c0
[   41.407171]  ? ipv6_setsockopt+0xa8/0x150
[   41.411301]  ? __do_page_fault+0xd60/0xd60
[   41.415518]  ? lockdep_sys_exit+0x47/0xf0
[   41.419637]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   41.424456]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.429475]  SyS_sendto+0x40/0x50
[   41.432910]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   41.437634] RIP: 0033:0x43fea9
[   41.440792] RSP: 002b:00007ffd2b6a7c88 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   41.448479] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   41.455733] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   41.462985] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   41.470240] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   41.477493] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   41.484954] Dumping ftrace buffer:
[   41.488561]    (ftrace buffer empty)
[   41.492250] Kernel Offset: disabled
[   41.495862] Rebooting in 86400 seconds..