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-1,10.128.0.60' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   56.860843] ------------[ cut here ]------------
[   56.865675] WARNING: CPU: 1 PID: 2982 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70
[   56.873786] Kernel panic - not syncing: panic_on_warn set ...
[   56.873786] 
[   56.881123] CPU: 1 PID: 2982 Comm: syzkaller080846 Not tainted 4.14.0-rc4-mm1+ #16
[   56.888799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.898123] Call Trace:
[   56.900682]  dump_stack+0x194/0x257
[   56.904282]  ? arch_local_irq_restore+0x53/0x53
[   56.908937]  panic+0x1e4/0x41c
[   56.912101]  ? refcount_error_report+0x214/0x214
[   56.916826]  ? show_regs_print_info+0x65/0x65
[   56.921303]  ? kmalloc_slab+0x5d/0x70
[   56.925074]  __warn+0x1c4/0x1e0
[   56.928323]  ? kmalloc_slab+0x5d/0x70
[   56.932095]  report_bug+0x211/0x2d0
[   56.935699]  fixup_bug+0x40/0x90
[   56.939038]  do_trap+0x260/0x390
[   56.942381]  do_error_trap+0x120/0x390
[   56.946244]  ? do_trap+0x390/0x390
[   56.949755]  ? kmalloc_slab+0x5d/0x70
[   56.953538]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   56.958356]  do_invalid_op+0x1b/0x20
[   56.962041]  invalid_op+0x18/0x20
[   56.965466] RIP: 0010:kmalloc_slab+0x5d/0x70
[   56.969842] RSP: 0018:ffff8801ce0474b0 EFLAGS: 00010246
[   56.975177] RAX: 0000000000000000 RBX: ffff8801ce047748 RCX: 0000000000000007
[   56.982417] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   56.989658] RBP: ffff8801ce0474b0 R08: ffff8801d06ba1c0 R09: ffff8801ce047b10
[   56.996898] R10: ffff8801ce804040 R11: 0000000000000000 R12: ffff8801ce047ab0
[   57.004139] R13: ffff8801ce047b10 R14: 00000000014080c0 R15: ffff8801ce1a17c0
[   57.011401]  __kmalloc+0x25/0x760
[   57.014834]  ? inet6_dump_ifaddr+0x30/0x30
[   57.019039]  ? ip6_setup_cork+0x1e8/0x15c0
[   57.023250]  ip6_setup_cork+0x1e8/0x15c0
[   57.027291]  ? __ip6_append_data.isra.43+0x3340/0x3340
[   57.032552]  ip6_make_skb+0x282/0x530
[   57.036326]  ? ip_reply_glue_bits+0xb0/0xb0
[   57.040622]  ? ip6_push_pending_frames+0xe0/0xe0
[   57.045347]  ? ip6_dst_hoplimit+0x10d/0x420
[   57.049644]  ? ip6_route_output_flags+0x1f1/0x2b0
[   57.054471]  ? __lock_is_held+0xbc/0x140
[   57.058517]  ? ip6_dst_hoplimit+0xc1/0x420
[   57.062720]  ? ip6_find_1stfragopt+0x240/0x240
[   57.067282]  udpv6_sendmsg+0x2769/0x3380
[   57.071315]  ? ip_reply_glue_bits+0xb0/0xb0
[   57.075623]  ? udpv6_setsockopt+0x80/0x80
[   57.079741]  ? find_held_lock+0x39/0x1d0
[   57.083782]  ? lock_downgrade+0x990/0x990
[   57.087900]  ? lock_downgrade+0x990/0x990
[   57.092019]  ? lock_release+0xd70/0xd70
[   57.095979]  ? do_raw_spin_trylock+0x190/0x190
[   57.100538]  ? __local_bh_enable_ip+0x9d/0x160
[   57.105096]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   57.110086]  ? release_sock+0x1d4/0x2a0
[   57.114035]  ? _raw_spin_unlock_bh+0x30/0x40
[   57.118416]  ? release_sock+0x1d4/0x2a0
[   57.122373]  ? udp_v6_get_port+0x9c/0xc0
[   57.126413]  inet_sendmsg+0x11f/0x5e0
[   57.130185]  ? inet_sendmsg+0x11f/0x5e0
[   57.134143]  ? __might_sleep+0x95/0x190
[   57.138088]  ? inet_recvmsg+0x5f0/0x5f0
[   57.142040]  ? selinux_socket_sendmsg+0x36/0x40
[   57.146682]  ? security_socket_sendmsg+0x89/0xb0
[   57.151410]  ? inet_recvmsg+0x5f0/0x5f0
[   57.155359]  sock_sendmsg+0xca/0x110
[   57.159046]  SYSC_sendto+0x358/0x5a0
[   57.162734]  ? SYSC_connect+0x480/0x480
[   57.166692]  ? mm_fault_error+0x2c0/0x2c0
[   57.170817]  ? ipv6_setsockopt+0xa8/0x150
[   57.174948]  ? __do_page_fault+0xd60/0xd60
[   57.179165]  ? lockdep_sys_exit+0x47/0xf0
[   57.183282]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   57.188097]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   57.193087]  SyS_sendto+0x40/0x50
[   57.196519]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   57.201246] RIP: 0033:0x43fea9
[   57.204407] RSP: 002b:00007ffe34538778 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[   57.212087] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9
[   57.219329] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003
[   57.226572] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   57.233816] R10: 0000000000000000 R11: 0000000000000217 R12: 04a17b4203d90165
[   57.241057] R13: 0100000000000000 R14: 0000000000000000 R15: 0000000000000000
[   57.248455] Dumping ftrace buffer:
[   57.252003]    (ftrace buffer empty)
[   57.255687] Kernel Offset: disabled
[   57.259293] Rebooting in 86400 seconds..