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 '10.128.0.19' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   36.046551] kasan: CONFIG_KASAN_INLINE enabled
[   36.051219] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   36.058745] general protection fault: 0000 [#1] SMP KASAN
[   36.064267] Dumping ftrace buffer:
[   36.067780]    (ftrace buffer empty)
[   36.071466] Modules linked in:
[   36.074645] CPU: 1 PID: 4443 Comm: syzkaller826180 Not tainted 4.16.0+ #377
[   36.081717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.091056] RIP: 0010:ucma_set_ib_path.isra.14+0x26a/0x850
[   36.096654] RSP: 0018:ffff8801da4cf7f0 EFLAGS: 00010202
[   36.102004] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000029
[   36.109265] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000148
[   36.116688] RBP: ffff8801da4cf9f0 R08: ffffed003b499f18 R09: ffffffff87b6c65c
[   36.123933] R10: 0000000000000002 R11: ffffed003b499f17 R12: ffff8801da4cf8a0
[   36.131201] R13: 1ffff1003b499f00 R14: ffff8801d91a11b0 R15: ffff8801d95cadc0
[   36.138449] FS:  0000000001ef1880(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
[   36.146649] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.152503] CR2: 0000000020000140 CR3: 00000001d956e001 CR4: 00000000001606e0
[   36.159768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.167012] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.174265] Call Trace:
[   36.176842]  ? ucma_event_handler+0xfa0/0xfa0
[   36.181318]  ? __might_fault+0x110/0x1d0
[   36.185356]  ? lock_downgrade+0x980/0x980
[   36.189481]  ? kasan_check_read+0x11/0x20
[   36.193607]  ? __might_sleep+0x95/0x190
[   36.197560]  ? kasan_check_write+0x14/0x20
[   36.201775]  ? _copy_from_user+0x99/0x110
[   36.205908]  ucma_set_option+0x234/0x520
[   36.209953]  ? ucma_set_option+0x234/0x520
[   36.214167]  ? ucma_set_ib_path.isra.14+0x850/0x850
[   36.219161]  ? kasan_check_write+0x14/0x20
[   36.223371]  ? _copy_from_user+0x99/0x110
[   36.227497]  ucma_write+0x2d6/0x3d0
[   36.231101]  ? ucma_set_ib_path.isra.14+0x850/0x850
[   36.236095]  ? ucma_close_id+0x60/0x60
[   36.239971]  ? do_raw_spin_unlock+0x9e/0x310
[   36.244356]  ? do_raw_spin_trylock+0x1a0/0x1a0
[   36.248913]  ? ucma_close_id+0x60/0x60
[   36.252785]  __vfs_write+0xef/0x970
[   36.256389]  ? kernel_read+0x120/0x120
[   36.260256]  ? may_open_dev+0xe0/0xe0
[   36.264044]  ? fsnotify+0x7b3/0x1140
[   36.267746]  ? rcu_is_watching+0x85/0x130
[   36.271881]  ? security_file_permission+0x89/0x1e0
[   36.276787]  ? rw_verify_area+0xe5/0x2b0
[   36.280832]  ? __fdget_raw+0x20/0x20
[   36.284523]  vfs_write+0x189/0x510
[   36.288039]  ksys_write+0xef/0x220
[   36.291555]  ? SyS_read+0x30/0x30
[   36.294988]  SyS_write+0x24/0x30
[   36.298327]  ? ksys_write+0x220/0x220
[   36.302106]  do_syscall_64+0x281/0x940
[   36.305972]  ? vmalloc_sync_all+0x30/0x30
[   36.310097]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   36.315438]  ? syscall_return_slowpath+0x550/0x550
[   36.320346]  ? syscall_return_slowpath+0x2ac/0x550
[   36.325249]  ? prepare_exit_to_usermode+0x350/0x350
[   36.330248]  ? entry_SYSCALL_64_after_hwframe+0x52/0xb7
[   36.335605]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   36.340453]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.345638] RIP: 0033:0x440039
[   36.348823] RSP: 002b:00007ffdc2f973a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000001
[   36.356521] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440039
[   36.363774] RDX: 0000000000000020 RSI: 0000000020001500 RDI: 0000000000000003
[   36.371035] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   36.378286] R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401960
[   36.385897] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
[   36.393169] Code: 00 00 48 c1 ea 03 80 3c 02 00 0f 85 0d 05 00 00 49 8b 07 48 ba 00 00 00 00 00 fc ff df 48 8d b8 48 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 54 05 00 00 48 c1 e3 04 48 03 98 48 01 00 00 
[   36.412406] RIP: ucma_set_ib_path.isra.14+0x26a/0x850 RSP: ffff8801da4cf7f0
[   36.419575] ---[ end trace 96ad186dbb9ca6d0 ]---
[   36.424331] Kernel panic - not syncing: Fatal exception
[   36.430089] Dumping ftrace buffer:
[   36.433606]    (ftrace buffer empty)
[   36.437305] Kernel Offset: disabled
[   36.440920] Rebooting in 86400 seconds..