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-386-4,10.128.15.228' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   20.868808] detected buffer overflow in strlen
[   20.873548] ------------[ cut here ]------------
[   20.878474] kernel BUG at lib/string.c:1051!
[   20.882888] invalid opcode: 0000 [#1] SMP KASAN
[   20.887525] Dumping ftrace buffer:
[   20.891029]    (ftrace buffer empty)
[   20.894705] Modules linked in:
[   20.897867] CPU: 0 PID: 2980 Comm: syzkaller272443 Not tainted 4.14.0-rc1+ #1
[   20.905103] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   20.914432] task: ffff8801ce4402c0 task.stack: ffff8801cf3f8000
[   20.920459] RIP: 0010:fortify_panic+0x13/0x20
[   20.924917] RSP: 0018:ffff8801cf3ff9b0 EFLAGS: 00010282
[   20.930245] RAX: 0000000000000022 RBX: 1ffff10039e7ff3a RCX: 0000000000000000
[   20.937481] RDX: 0000000000000022 RSI: 1ffff10039e7fef6 RDI: ffffed0039e7ff2a
[   20.944717] RBP: ffff8801cf3ff9b0 R08: ffff8801cf3ff0a0 R09: 0000000000000000
[   20.951954] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000024
[   20.959190] R13: dffffc0000000000 R14: 0000000000000030 R15: ffff8801cf3ffaf8
[   20.966432] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008fe7840
[   20.974621] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   20.980467] CR2: 0000000020000000 CR3: 00000001cd516000 CR4: 00000000001406f0
[   20.987704] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   20.994943] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   21.002178] Call Trace:
[   21.004743]  xt_copy_counters_from_user+0x38d/0x3b0
[   21.009724]  ? xt_alloc_table_info+0xe0/0xe0
[   21.014102]  ? wait_for_completion+0x770/0x770
[   21.018651]  ? lock_downgrade+0x990/0x990
[   21.022765]  do_add_counters+0x96/0x550
[   21.026705]  ? module_unload_free+0x5b0/0x5b0
[   21.031170]  ? compat_table_info+0x4a0/0x4a0
[   21.035545]  ? security_capable+0x8e/0xc0
[   21.039661]  ? ns_capable_common+0xcf/0x160
[   21.043950]  compat_do_ip6t_set_ctl+0xc5/0x150
[   21.048501]  compat_nf_setsockopt+0x88/0x130
[   21.052875]  ? compat_do_replace.isra.14+0x6f0/0x6f0
[   21.057952]  compat_ipv6_setsockopt+0x13a/0x1e0
[   21.062589]  inet_csk_compat_setsockopt+0x95/0x120
[   21.067484]  ? ipv6_setsockopt+0x150/0x150
[   21.071689]  compat_tcp_setsockopt+0x3d/0x70
[   21.076068]  compat_sock_common_setsockopt+0xb2/0x140
[   21.081225]  ? tcp_setsockopt+0xd0/0xd0
[   21.085168]  compat_SyS_setsockopt+0x17c/0x410
[   21.089714]  ? sock_common_setsockopt+0xd0/0xd0
[   21.094356]  ? scm_detach_fds_compat+0x3c0/0x3c0
[   21.099083]  ? do_fast_syscall_32+0x158/0xeed
[   21.103545]  ? scm_detach_fds_compat+0x3c0/0x3c0
[   21.108266]  do_fast_syscall_32+0x3f2/0xeed
[   21.112557]  ? do_int80_syscall_32+0x930/0x930
[   21.117105]  ? kasan_check_read+0x11/0x20
[   21.121219]  ? syscall_return_slowpath+0x500/0x500
[   21.126116]  ? SyS_rt_sigaction+0x94/0x1b0
[   21.130320]  ? lockdep_sys_exit+0x47/0xf0
[   21.134437]  ? retint_user+0x18/0x20
[   21.138119]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   21.142932]  entry_SYSENTER_compat+0x51/0x60
[   21.147305] RIP: 0023:0xf7fbbc79
[   21.150643] RSP: 002b:00000000ffb4d8cc EFLAGS: 00000282 ORIG_RAX: 000000000000016e
[   21.158317] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000029
[   21.165562] RDX: 0000000000000041 RSI: 0000000020000000 RDI: 0000000000000030
[   21.172796] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[   21.180034] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   21.187275] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   21.194521] Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 e2 94 d1 fc eb de 55 48 89 fe 48 c7 c7 80 06 4a 85 48 89 e5 e8 02 96 87 fc <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 
[   21.213588] RIP: fortify_panic+0x13/0x20 RSP: ffff8801cf3ff9b0
[   21.219585] ---[ end trace 01f8daf3547f6ebb ]---
[   21.224332] Kernel panic - not syncing: Fatal exception
[   21.230211] Dumping ftrace buffer:
[   21.233727]    (ftrace buffer empty)
[   21.237401] Kernel Offset: disabled
[   21.240994] Rebooting in 86400 seconds..