[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 20.460879] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.669051] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.526188] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) [ 28.524307] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) [ 28.653267] random: nonblocking pool is initialized Warning: Permanently added '10.128.15.199' (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 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 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 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 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 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 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 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 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 [ 36.219415] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 36.227693] IP: [] l2tp_session_create+0x93e/0x10f0 [ 36.234419] PGD 80000001cc710067 PUD 1c6832067 PMD 0 [ 36.240007] Oops: 0002 [#1] PREEMPT SMP KASAN [ 36.245037] Dumping ftrace buffer: [ 36.248561] (ftrace buffer empty) [ 36.252255] Modules linked in: [ 36.255559] CPU: 1 PID: 3781 Comm: syzkaller804204 Not tainted 4.4.115-gaa856bd #7 executing program executing program executing program executing program executing program executing program executing program executing program [ 36.263254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.272600] task: ffff8801d30c8000 task.stack: ffff8801d8cf8000 [ 36.278647] RIP: 0010:[] [] l2tp_session_create+0x93e/0x10f0 [ 36.287812] RSP: 0018:ffff8801d8cffad0 EFLAGS: 00010246 [ 36.293265] RAX: 0000000000000000 RBX: ffff8800b3e90000 RCX: ffffffff83458606 [ 36.300534] RDX: 1ffff100167d2030 RSI: 0000000000000002 RDI: ffff8800b3e90180 [ 36.307793] RBP: ffff8801d8cffb40 R08: 000000000000000a R09: 000000000000ffff executing program executing program executing program executing program executing program executing program executing program executing program [ 36.315063] R10: ffffffff85700680 R11: ffffffff84418180 R12: ffff8801cfe56aa8 [ 36.322339] R13: ffff8801d8cffc58 R14: ffff8800b3e900e0 R15: ffff8801cfe56a00 [ 36.329609] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7790b40 [ 36.337829] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.343708] CR2: 0000000000000080 CR3: 00000001ca300000 CR4: 0000000000160670 [ 36.350972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.358244] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.365587] Stack: executing program executing program executing program executing program executing program executing program executing program executing program [ 36.367731] ffffffff8113bd9a ffff8800b3e90020 ffff8801cfe56b58 ffff8801d8cffb00 [ 36.375799] ffff8801cfe56a10 0000000000000000 ffff8801cfe56ab0 ffff8801cfe56b50 [ 36.383877] ffffffff00000000 0000000000000000 ffff8801c618cc80 0000000000000000 [ 36.391923] Call Trace: [ 36.394505] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 36.400829] [] pppol2tp_connect+0x10fc/0x1930 [ 36.406983] [] ? pppol2tp_recv+0x330/0x330 [ 36.412869] [] ? __fget+0x20b/0x3b0 executing program executing program executing program executing program executing program executing program executing program executing program [ 36.418151] [] ? __might_fault+0xe4/0x1d0 [ 36.423953] [] ? check_stack_object+0x68/0x140 [ 36.430184] [] ? security_socket_connect+0x89/0xb0 [ 36.436759] [] SYSC_connect+0x1b6/0x310 [ 36.442384] [] ? SYSC_bind+0x280/0x280 [ 36.447935] [] ? handle_mm_fault+0x3f2/0x3190 [ 36.454092] [] ? debug_check_no_obj_freed+0x2d2/0x9b0 [ 36.460943] [] ? __do_page_fault+0x290/0xa00 executing program executing program executing program executing program executing program executing program executing program [ 36.467020] [] ? __do_page_fault+0x380/0xa00 [ 36.473088] [] SyS_connect+0x24/0x30 [ 36.478448] [] ? SyS_accept+0x30/0x30 [ 36.483900] [] do_fast_syscall_32+0x314/0x890 [ 36.491222] [] sysenter_flags_fixed+0xd/0x17 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.497269] 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 4b 4b [ 36.524961] RIP [] l2tp_session_create+0x93e/0x10f0 [ 36.531765] RSP [ 36.535389] CR2: 0000000000000080 [ 36.545431] ---[ end trace 07a9d84de0c03773 ]--- [ 36.571748] Kernel panic - not syncing: Fatal exception [ 36.577619] Dumping ftrace buffer: [ 36.581137] (ftrace buffer empty) [ 36.584815] Kernel Offset: disabled [ 36.588412] Rebooting in 86400 seconds..