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-8,10.128.0.17' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.556704] ------------[ cut here ]------------
[   33.557534] WARNING: CPU: 0 PID: 2996 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70
[   33.558746] Kernel panic - not syncing: panic_on_warn set ...
[   33.558746] 
[   33.559768] CPU: 0 PID: 2996 Comm: syzkaller991547 Not tainted 4.14.0-rc5+ #141
[   33.560743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.561973] Call Trace:
[   33.562333]  dump_stack+0x194/0x257
[   33.562829]  ? arch_local_irq_restore+0x53/0x53
[   33.563466]  panic+0x1e4/0x417
[   33.563912]  ? __warn+0x1d9/0x1d9
[   33.564395]  ? show_regs_print_info+0x65/0x65
[   33.565007]  ? kmalloc_slab+0x5d/0x70
[   33.565517]  __warn+0x1c4/0x1d9
[   33.565965]  ? kmalloc_slab+0x5d/0x70
[   33.566496]  report_bug+0x211/0x2d0
[   33.567044]  fixup_bug+0x40/0x90
[   33.567503]  do_trap+0x260/0x390
[   33.567987]  do_error_trap+0x120/0x390
[   33.568514]  ? do_trap+0x390/0x390
[   33.568993]  ? kmalloc_slab+0x5d/0x70
[   33.569511]  ? ipv6_dev_get_saddr+0x418/0xa20
[   33.570125]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.570806]  do_invalid_op+0x1b/0x20
[   33.571361]  invalid_op+0x18/0x20
[   33.571827] RIP: 0010:kmalloc_slab+0x5d/0x70
[   33.572425] RSP: 0018:ffff8801d1d1f4b0 EFLAGS: 00010246
[   33.573137] RAX: 0000000000000000 RBX: ffff8801d1d1f748 RCX: 0000000000000007
[   33.574089] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801
[   33.575061] RBP: ffff8801d1d1f4b0 R08: ffff8801d65331c0 R09: ffff8801d1d1fb10
[   33.576032] R10: ffff8801d1d1f678 R11: 0000000000000000 R12: ffff8801d1d1fab0
[   33.578088] R13: ffff8801d1d1fb10 R14: 00000000014080c0 R15: ffff8801cdfdb880
[   33.585349]  __kmalloc+0x25/0x760
[   33.588777]  ? __ipv6_dev_get_saddr+0x4f0/0x4f0
[   33.593418]  ? ip6_setup_cork+0x1e8/0x15c0
[   33.597634]  ip6_setup_cork+0x1e8/0x15c0
[   33.601675]  ? __ip6_append_data.isra.43+0x32b0/0x32b0
[   33.606926]  ? ip6_pol_route_output+0x4c/0x60
[   33.611394]  ? ip6_pol_route_input+0x70/0x70
[   33.615779]  ip6_make_skb+0x282/0x530
[   33.619551]  ? ip_reply_glue_bits+0xb0/0xb0
[   33.623847]  ? ip6_push_pending_frames+0xe0/0xe0
[   33.628574]  ? ip6_dst_hoplimit+0x26c/0x420
[   33.632873]  ? lock_downgrade+0x990/0x990
[   33.637001]  ? __lock_is_held+0xb6/0x140
[   33.641054]  ? ip6_dst_hoplimit+0xc1/0x420
[   33.645258]  ? ip6_find_1stfragopt+0x240/0x240
[   33.649818]  udpv6_sendmsg+0x2769/0x3380
[   33.653856]  ? ip_reply_glue_bits+0xb0/0xb0
[   33.658161]  ? udpv6_setsockopt+0x80/0x80
[   33.662283]  ? reacquire_held_locks+0x1fd/0x3d0
[   33.666919]  ? reacquire_held_locks+0x1fd/0x3d0
[   33.671559]  ? find_held_lock+0x35/0x1d0
[   33.675596]  ? release_sock+0x1d4/0x2a0
[   33.679540]  ? lock_downgrade+0x990/0x990
[   33.683656]  ? lock_downgrade+0x990/0x990
[   33.687775]  ? do_raw_spin_trylock+0x190/0x190
[   33.692333]  ? __local_bh_enable_ip+0x9d/0x160
[   33.696888]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.701873]  ? release_sock+0x1d4/0x2a0
[   33.705822]  ? _raw_spin_unlock_bh+0x30/0x40
[   33.710201]  ? release_sock+0x1d4/0x2a0
[   33.714153]  ? udp_v6_get_port+0x9c/0xc0
[   33.718192]  inet_sendmsg+0x11f/0x5e0
[   33.721962]  ? inet_sendmsg+0x11f/0x5e0
[   33.725905]  ? __might_sleep+0x95/0x190
[   33.729847]  ? inet_recvmsg+0x5f0/0x5f0
[   33.733796]  ? selinux_socket_sendmsg+0x36/0x40
[   33.738437]  ? security_socket_sendmsg+0x89/0xb0
[   33.743164]  ? inet_recvmsg+0x5f0/0x5f0
[   33.747109]  sock_sendmsg+0xca/0x110
[   33.750793]  SYSC_sendto+0x352/0x5a0
[   33.754481]  ? SYSC_connect+0x470/0x470
[   33.758434]  ? mm_fault_error+0x2c0/0x2c0
[   33.762554]  ? ipv6_setsockopt+0xa8/0x150
[   33.766677]  ? __do_page_fault+0xd60/0xd60
[   33.770891]  ? SyS_recv+0x40/0x40
[   33.774316]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   33.779674]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.784665]  SyS_sendto+0x40/0x50
[   33.788090]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   33.792814] RIP: 0033:0x440009
[   33.795972] RSP: 002b:00007fff6703e6d8 EFLAGS: 00000216 ORIG_RAX: 000000000000002c
[   33.803645] RAX: ffffffffffffffda RBX: 00000000006ccd60 RCX: 0000000000440009
[   33.810882] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000006
[   33.818120] RBP: 0000000000000082 R08: 0000000020e0afe4 R09: 000000000000001c
[   33.825357] R10: 0000000000000000 R11: 0000000000000216 R12: 505daaef76b36d7c
[   33.832612] R13: 04a17b4203d90165 R14: 0000000000000000 R15: 0000000000000000
[   33.840002] Dumping ftrace buffer:
[   33.843548]    (ftrace buffer empty)
[   33.847229] Kernel Offset: disabled
[   33.850828] Rebooting in 86400 seconds..