[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.036334] 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: [ 20.969528] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.405288] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 22.267483] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) [ 22.423104] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. [ 28.417377] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) executing program [ 28.514766] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.435358] random: nonblocking pool is initialized executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.000082] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 38.008328] IP: [] l2tp_session_create+0x93e/0x10f0 [ 38.015000] PGD 80000000b6121067 PUD b60bf067 PMD 0 [ 38.020439] Oops: 0002 [#1] PREEMPT SMP KASAN [ 38.025373] Dumping ftrace buffer: [ 38.028902] (ftrace buffer empty) [ 38.032600] Modules linked in: [ 38.035899] CPU: 0 PID: 4339 Comm: syzkaller438807 Not tainted 4.4.115-g5e56f24 #14 [ 38.043673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.053005] task: ffff8800ae533000 task.stack: ffff8800baf48000 [ 38.059038] RIP: 0010:[] [] l2tp_session_create+0x93e/0x10f0 [ 38.068169] RSP: 0018:ffff8800baf4fad0 EFLAGS: 00010246 [ 38.073592] RAX: 0000000000000000 RBX: ffff8800baec2500 RCX: ffffffff834586d6 [ 38.080848] RDX: 1ffff100175d84d0 RSI: 0000000000000003 RDI: ffff8800baec2680 [ 38.088101] RBP: ffff8800baf4fb40 R08: 000000000000000a R09: 000000000000ffff [ 38.095395] R10: ffffffff85700680 R11: ffffffff84418180 R12: ffff8801da3d0828 [ 38.102641] R13: ffff8800baf4fc58 R14: ffff8800baec25e0 R15: ffff8801da3d0780 [ 38.109885] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77aeb40 [ 38.118082] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 38.123935] CR2: 0000000000000080 CR3: 00000000baec0000 CR4: 0000000000160670 [ 38.131186] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.138430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.145669] Stack: [ 38.147787] ffffffff8113bd9a ffff8800baec2520 ffff8801da3d08d8 ffff8800baf4fb00 [ 38.155747] ffff8801da3d0790 0000000000000000 ffff8801da3d0830 ffff8801da3d08d0 [ 38.163710] ffffffff00000000 0000000000000000 ffff8801ca8b6600 0000000000000000 [ 38.171677] Call Trace: [ 38.174237] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 38.180525] [] pppol2tp_connect+0x10fc/0x1930 [ 38.186636] [] ? pppol2tp_recv+0x330/0x330 [ 38.192488] [] ? retint_kernel+0x2d/0x2d [ 38.198184] [] ? __fget+0x20b/0x3b0 [ 38.203440] [] ? __might_fault+0xe4/0x1d0 [ 38.209222] [] ? check_stack_object+0x68/0x140 [ 38.215511] [] ? security_socket_connect+0x89/0xb0 [ 38.222060] [] SYSC_connect+0x1b6/0x310 [ 38.227650] [] ? SYSC_bind+0x280/0x280 [ 38.233157] [] ? handle_mm_fault+0x3f2/0x3190 [ 38.239270] [] ? __alloc_fd+0x1e3/0x500 [ 38.244862] [] ? memset+0x31/0x40 [ 38.249935] [] ? vmacache_update+0xfe/0x130 [ 38.255879] [] ? __do_page_fault+0x380/0xa00 [ 38.261908] [] SyS_connect+0x24/0x30 [ 38.267238] [] ? SyS_accept+0x30/0x30 [ 38.272671] [] do_fast_syscall_32+0x314/0x890 [ 38.278788] [] sysenter_flags_fixed+0xd/0x17 [ 38.284812] 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 [ 38.311341] RIP [] l2tp_session_create+0x93e/0x10f0 [ 38.318088] RSP [ 38.321682] CR2: 0000000000000080 [ 38.328799] ---[ end trace 56b7963866035c43 ]--- [ 38.333616] Kernel panic - not syncing: Fatal exception [ 38.339349] Dumping ftrace buffer: [ 38.342855] (ftrace buffer empty) [ 38.346532] Kernel Offset: disabled [ 38.350127] Rebooting in 86400 seconds..