[ 20.335728] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 20.849982] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [ 21.104176] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.105838] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available) [ 37.636347] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts. [ 42.994926] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) 2018/03/15 13:55:05 parsed 1 programs 2018/03/15 13:55:05 executed programs: 0 [ 43.365918] IPVS: Creating netns size=2552 id=1 [ 43.390891] IPVS: Creating netns size=2552 id=2 [ 43.436305] IPVS: Creating netns size=2552 id=3 [ 43.487423] IPVS: Creating netns size=2552 id=4 [ 43.529707] IPVS: Creating netns size=2552 id=5 [ 43.570901] IPVS: Creating netns size=2552 id=6 [ 43.601809] IPVS: Creating netns size=2552 id=7 [ 43.656458] IPVS: Creating netns size=2552 id=8 2018/03/15 13:55:10 executed programs: 670 2018/03/15 13:55:15 executed programs: 1253 [ 55.466737] random: nonblocking pool is initialized [ 56.652529] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 56.660802] IP: [] l2tp_session_create+0x93e/0x10f0 [ 56.667532] PGD 80000001cd5d8067 PUD 1cd7b0067 PMD 0 [ 56.673225] Oops: 0002 [#1] PREEMPT SMP KASAN [ 56.678269] Dumping ftrace buffer: [ 56.681789] (ftrace buffer empty) [ 56.685487] Modules linked in: [ 56.688796] CPU: 1 PID: 8866 Comm: syz-executor4 Not tainted 4.4.120-gd63fdf6 #28 [ 56.696401] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.705746] task: ffff8801cc6d4800 task.stack: ffff8801ce9c8000 [ 56.711802] RIP: 0010:[] [] l2tp_session_create+0x93e/0x10f0 [ 56.720918] RSP: 0018:ffff8801ce9cfb48 EFLAGS: 00010246 [ 56.726342] RAX: 0000000000000000 RBX: ffff8801d143d400 RCX: ffffffff83458dd6 [ 56.733589] RDX: 1ffff1003a287ab0 RSI: 0000000000000002 RDI: ffff8801d143d580 [ 56.740835] RBP: ffff8801ce9cfbb8 R08: 000000000000000a R09: 0000000000000000 [ 56.748085] R10: ffffffff85700600 R11: ffffffff84418340 R12: ffff8801d143d228 [ 56.755332] R13: ffff8801ce9cfcd0 R14: ffff8801d143d4e0 R15: ffff8801d143d180 [ 56.762580] FS: 00007f9c090cc700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 56.770779] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.776640] CR2: 0000000000000080 CR3: 00000001c9a20000 CR4: 0000000000160670 [ 56.783891] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.791137] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.798382] Stack: [ 56.800505] ffffffff8113bd95 ffff8801d143d420 ffff8801d143d2d8 ffff8801ce9cfb78 [ 56.808513] ffff8801d143d190 0000000000000000 ffff8801d143d230 ffff8801d143d2d0 [ 56.816524] eebac54300000000 0000000000000000 ffff8800ab815500 0000000000000000 [ 56.824523] Call Trace: [ 56.827092] [] ? __local_bh_enable_ip+0xc5/0xd0 [ 56.833387] [] pppol2tp_connect+0x10fc/0x1930 [ 56.839508] [] ? pppol2tp_recv+0x330/0x330 [ 56.845369] [] ? __might_fault+0xe4/0x1d0 [ 56.851149] [] ? check_stack_object+0x68/0x140 [ 56.857360] [] ? security_socket_connect+0x89/0xb0 [ 56.863915] [] SYSC_connect+0x1b6/0x310 [ 56.869512] [] ? SYSC_bind+0x280/0x280 [ 56.875025] [] ? get_unused_fd_flags+0xd0/0xd0 [ 56.881235] [] ? _raw_spin_unlock+0x2c/0x50 [ 56.887179] [] ? __alloc_fd+0x1e3/0x500 [ 56.892777] [] ? do_futex+0x15d0/0x15d0 [ 56.898375] [] ? SyS_socket+0x121/0x1b0 [ 56.903977] [] ? move_addr_to_kernel+0x50/0x50 [ 56.910185] [] SyS_connect+0x24/0x30 [ 56.915522] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 56.922074] Code: 00 00 48 8d bb 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4f 07 00 00 48 8b 83 80 01 00 00 ff 80 80 00 00 00 48 8d 43 20 48 89 c7 48 89 45 b8 e8 cb 38 [ 56.949160] RIP [] l2tp_session_create+0x93e/0x10f0 [ 56.955923] RSP [ 56.959524] CR2: 0000000000000080 [ 57.075210] ---[ end trace 95d08f65baa7fc9f ]--- [ 57.080181] Kernel panic - not syncing: Fatal exception [ 57.086056] Dumping ftrace buffer: [ 57.089574] (ftrace buffer empty) [ 57.093259] Kernel Offset: disabled [ 57.096857] Rebooting in 86400 seconds..