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 '10.128.0.36' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
syzkaller login: [   43.675118] list_add corruption. prev->next should be next (00000000f634c78e), but was           (null). (prev=000000004ec1b2e1).
[   43.687226] ------------[ cut here ]------------
[   43.691990] kernel BUG at lib/list_debug.c:28!
[   43.696679] invalid opcode: 0000 [#1] SMP PTI
[   43.701203] Dumping ftrace buffer:
[   43.704739]    (ftrace buffer empty)
[   43.708439] Modules linked in:
[   43.711666] CPU: 1 PID: 4686 Comm: syz-executor918 Not tainted 4.16.0+ #87
[   43.718672] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.728141] RIP: 0010:__list_add_valid+0x43c/0x450
[   43.733077] RSP: 0018:ffff8801af0df9e0 EFLAGS: 00010286
[   43.738442] RAX: 0000000000000075 RBX: 0000000000000000 RCX: 0000000000000000
[   43.745713] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
[   43.752983] RBP: ffff8801af0dfa48 R08: 0000000001080020 R09: 0000000000000002
[   43.760257] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8acd0d90
[   43.767527] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88019d514418
[   43.774910] FS:  0000000001259880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   43.783162] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.789066] CR2: 00000000006cc0a0 CR3: 000000019d4a4000 CR4: 00000000001406e0
[   43.796348] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.803790] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.811079] Call Trace:
[   43.813745]  rdma_listen+0x65f/0x10f0
[   43.817573]  ucma_listen+0x4e9/0x630
[   43.821303]  ucma_write+0x576/0x5e0
[   43.824931]  ? show_ibdev+0xf0/0xf0
[   43.828564]  __vfs_write+0x1a3/0x9f0
[   43.832294]  vfs_write+0x463/0x8d0
[   43.835905]  SYSC_write+0x172/0x360
[   43.839583]  SyS_write+0x55/0x80
[   43.843027]  do_syscall_64+0x309/0x430
[   43.846951]  ? SYSC_read+0x360/0x360
[   43.850671]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   43.855861] RIP: 0033:0x4417b9
[   43.859055] RSP: 002b:00007ffd97fcaf88 EFLAGS: 00000207 ORIG_RAX: 0000000000000001
[   43.866784] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004417b9
[   43.874063] RDX: 0000000000000010 RSI: 0000000020000100 RDI: 0000000000000003
[   43.881338] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
[   43.888609] R10: 0000000000000001 R11: 0000000000000207 R12: 000000000000aa92
[   43.895883] R13: 00000000006cd448 R14: 0000000000000000 R15: 0000000000000000
[   43.903166] Code: 80 0c 00 00 00 00 00 00 41 c7 87 20 03 00 00 00 00 00 00 48 c7 c7 c8 f6 82 8a 31 c0 4c 89 e6 4c 89 ea 48 8b 4d c0 e8 34 ab 51 fd <0f> 0b 66 90 eb fe 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 
[   43.922607] RIP: __list_add_valid+0x43c/0x450 RSP: ffff8801af0df9e0
[   43.929170] ---[ end trace 0c643a8ef7cc369f ]---
[   43.934020] Kernel panic - not syncing: Fatal exception
[   43.939950] Dumping ftrace buffer:
[   43.943489]    (ftrace buffer empty)
[   43.947186] Kernel Offset: disabled
[   43.950811] Rebooting in 86400 seconds..