[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.743960] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.098385] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.523542] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.245479] random: sshd: uninitialized urandom read (32 bytes read, 71 bits of entropy available) [ 68.281883] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts. [ 73.692790] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 79.512902] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 79.521187] IP: [] l2tp_session_create+0x93e/0x10f0 [ 79.527892] PGD 80000000b65bd067 PUD b6422067 PMD 0 [ 79.533364] Oops: 0002 [#1] PREEMPT SMP KASAN [ 79.538342] Dumping ftrace buffer: [ 79.541862] (ftrace buffer empty) [ 79.545559] Modules linked in: [ 79.548864] CPU: 1 PID: 6910 Comm: syzkaller912044 Not tainted 4.4.112-g3fc4284 #25 executing program executing program executing program [ 79.556642] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.565981] task: ffff8801ce3197c0 task.stack: ffff8801ce7b8000 [ 79.572021] RIP: 0010:[] [] l2tp_session_create+0x93e/0x10f0 [ 79.581152] RSP: 0018:ffff8801ce7bfad0 EFLAGS: 00010246 [ 79.586586] RAX: 0000000000000000 RBX: ffff8801cf6d9400 RCX: ffffffff8345a3e6 [ 79.593847] RDX: 1ffff10039edb2b0 RSI: 0000000000000002 RDI: ffff8801cf6d9580 [ 79.601108] RBP: ffff8801ce7bfb40 R08: 000000000000000a R09: 0000000000000000 executing program executing program executing program executing program [ 79.608369] R10: ffffffff856fe600 R11: ffffffff84417100 R12: ffff8801cf6d85a8 [ 79.615634] R13: ffff8801ce7bfc58 R14: ffff8801cf6d94e0 R15: ffff8801cf6d8500 [ 79.622894] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f774bb40 [ 79.631111] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 79.636980] CR2: 0000000000000080 CR3: 00000000b2e4a000 CR4: 0000000000160670 [ 79.644239] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.651496] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.658752] Stack: executing program executing program [ 79.660884] ffffffff8113bd0a ffff8801cf6d9420 ffff8801cf6d8658 ffff8801ce7bfb00 [ 79.668913] ffff8801cf6d8510 0000000000000000 ffff8801cf6d85b0 ffff8801cf6d8650 [ 79.676938] ffffffff00000000 0000000000000000 ffff8800b2a58000 0000000000000000 [ 79.684964] Call Trace: [ 79.687544] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 79.693855] [] pppol2tp_connect+0x10fc/0x1930 [ 79.699993] [] ? pppol2tp_recv+0x330/0x330 [ 79.705867] [] ? __might_fault+0xe4/0x1d0 executing program executing program executing program executing program [ 79.711656] [] ? check_stack_object+0x68/0x140 [ 79.717879] [] ? security_socket_connect+0x89/0xb0 [ 79.724447] [] SYSC_connect+0x1b6/0x310 [ 79.730061] [] ? SYSC_bind+0x280/0x280 [ 79.735590] [] ? handle_mm_fault+0x3f2/0x3190 [ 79.741728] [] ? vmacache_update+0xfe/0x130 [ 79.747689] [] ? __do_page_fault+0x380/0xa00 [ 79.753741] [] SyS_connect+0x24/0x30 executing program executing program [ 79.759093] [] ? SyS_accept+0x30/0x30 [ 79.765578] [] do_fast_syscall_32+0x314/0x890 [ 79.771715] [] sysenter_flags_fixed+0xd/0x17 [ 79.777757] 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 3b 4b [ 79.804963] RIP [] l2tp_session_create+0x93e/0x10f0 executing program executing program [ 79.811746] RSP [ 79.815352] CR2: 0000000000000080 [ 79.833522] ---[ end trace 289d7931c84adbbe ]--- [ 79.838416] Kernel panic - not syncing: Fatal exception [ 79.844213] Dumping ftrace buffer: [ 79.847729] (ftrace buffer empty) [ 79.851411] Kernel Offset: disabled [ 79.855005] Rebooting in 86400 seconds..