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 '10.128.0.22' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   25.396604] detected buffer overflow in memcpy
[   25.401369] ------------[ cut here ]------------
[   25.406101] kernel BUG at lib/string.c:1052!
[   25.410797] invalid opcode: 0000 [#1] SMP KASAN
[   25.415457] Dumping ftrace buffer:
[   25.419081]    (ftrace buffer empty)
[   25.422776] Modules linked in:
[   25.425943] CPU: 1 PID: 4420 Comm: syzkaller185831 Not tainted 4.16.0-rc7+ #4
[   25.433195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   25.443328] RIP: 0010:fortify_panic+0x13/0x20
[   25.447791] RSP: 0018:ffff8801b02bf940 EFLAGS: 00010282
[   25.453127] RAX: 0000000000000022 RBX: 1ffff10036057f2d RCX: 0000000000000000
[   25.460372] RDX: 0000000000000022 RSI: 1ffff10036057edd RDI: ffffed0036057f1c
[   25.467618] RBP: ffff8801b02bf940 R08: 0000000000000000 R09: 0000000000000000
[   25.474861] R10: 0000000000000006 R11: 0000000000000000 R12: ffff8801b02bf9e8
[   25.482110] R13: ffff8801b02bf988 R14: ffff8801b02bfaa8 R15: 000000000000fa00
[   25.489354] FS:  00000000019ff880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   25.497551] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.503403] CR2: 0000000020000140 CR3: 00000001b0f1b005 CR4: 00000000001606e0
[   25.510646] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   25.517895] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   25.525138] Call Trace:
[   25.527708]  ucma_join_ip_multicast+0x37a/0x3c0
[   25.532353]  ? ucma_join_multicast+0x130/0x130
[   25.536909]  ? check_same_owner+0x320/0x320
[   25.541208]  ? __might_sleep+0x95/0x190
[   25.545160]  ? kasan_check_write+0x14/0x20
[   25.549371]  ucma_write+0x2d6/0x3d0
[   25.552969]  ? ucma_join_multicast+0x130/0x130
[   25.557521]  ? ucma_close_id+0x60/0x60
[   25.561383]  ? ucma_close_id+0x60/0x60
[   25.565258]  __vfs_write+0xef/0x970
[   25.568856]  ? kernel_read+0x120/0x120
[   25.572726]  ? rcu_pm_notify+0xc0/0xc0
[   25.576589]  ? putname+0xee/0x130
[   25.580021]  ? security_file_permission+0x89/0x1e0
[   25.584926]  ? rw_verify_area+0xe5/0x2b0
[   25.588964]  ? __fdget_raw+0x20/0x20
[   25.592648]  vfs_write+0x189/0x510
[   25.596162]  SyS_write+0xef/0x220
[   25.599584]  ? filp_open+0x70/0x70
[   25.603101]  ? SyS_read+0x220/0x220
[   25.606705]  ? do_syscall_64+0xb7/0x940
[   25.610670]  ? SyS_read+0x220/0x220
[   25.614275]  do_syscall_64+0x281/0x940
[   25.618136]  ? __do_page_fault+0xc90/0xc90
[   25.622344]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   25.627504]  ? syscall_return_slowpath+0x550/0x550
[   25.632404]  ? syscall_return_slowpath+0x2ac/0x550
[   25.637307]  ? prepare_exit_to_usermode+0x350/0x350
[   25.642310]  ? entry_SYSCALL_64_after_hwframe+0x52/0xb7
[   25.647646]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   25.652465]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   25.657626] RIP: 0033:0x43fd29
[   25.660786] RSP: 002b:00007ffed3ea1058 EFLAGS: 00000213 ORIG_RAX: 0000000000000001
[   25.668461] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd29
[   25.675699] RDX: 0000000000000118 RSI: 0000000020000f80 RDI: 0000000000000003
[   25.682943] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   25.690185] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401650
[   25.697426] R13: 00000000004016e0 R14: 0000000000000000 R15: 0000000000000000
[   25.704675] Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 d2 a7 3f fb eb de 55 48 89 fe 48 c7 c7 c0 43 44 87 48 89 e5 e8 d5 05 f1 fa <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 
[   25.723759] RIP: fortify_panic+0x13/0x20 RSP: ffff8801b02bf940
[   25.729965] ---[ end trace 71f07011b6e6886b ]---
[   25.734732] Kernel panic - not syncing: Fatal exception
[   25.740558] Dumping ftrace buffer:
[   25.744081]    (ftrace buffer empty)
[   25.747762] Kernel Offset: disabled
[   25.751360] Rebooting in 86400 seconds..