[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.437469] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.672729] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 28.152381] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 28.926050] random: sshd: uninitialized urandom read (32 bytes read, 77 bits of entropy available) [ 69.913686] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 75.553605] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) 2018/08/22 14:51:05 parsed 1 programs [ 76.781291] random: cc1: uninitialized urandom read (8 bytes read, 100 bits of entropy available) 2018/08/22 14:51:07 executed programs: 0 [ 77.939028] IPVS: Creating netns size=2552 id=1 [ 78.009061] IPVS: Creating netns size=2552 id=2 [ 78.083781] IPVS: Creating netns size=2552 id=3 [ 78.188599] IPVS: Creating netns size=2552 id=4 [ 78.275483] IPVS: Creating netns size=2552 id=5 [ 78.367719] IPVS: Creating netns size=2552 id=6 [ 78.591238] IPVS: Creating netns size=2552 id=7 [ 78.683862] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 78.742248] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 78.822173] IPVS: Creating netns size=2552 id=8 [ 78.904150] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 78.951001] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 79.171498] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 79.254190] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 79.349135] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 79.453426] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 79.649708] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 79.663205] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 79.678586] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 79.688754] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 79.727596] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 79.744282] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 79.757221] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 79.769617] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 79.884695] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 79.964920] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 80.004700] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 80.070587] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 80.128633] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 80.192143] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 80.256785] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 80.270545] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 80.287564] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 80.295370] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 80.343991] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 80.409538] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 80.424710] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 80.516084] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 80.552478] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 80.652626] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 80.813002] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 80.822349] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 80.887186] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 80.899430] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 80.931056] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 80.942962] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 80.985500] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 81.021619] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 81.034685] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 81.053822] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.070955] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.085113] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 81.106934] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 81.130384] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 81.158061] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 81.178417] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 81.190790] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.269605] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 81.513643] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 81.572021] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 81.639873] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 81.742307] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 81.843599] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 81.864363] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 81.895917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 81.934557] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 82.029479] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 82.070216] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 82.125210] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 82.170566] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 82.264403] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 82.369550] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 85.657209] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 85.812755] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 85.917500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 86.068192] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 86.236970] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 86.312808] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 86.432038] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 86.547517] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 86.576151] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 86.674363] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 87.254456] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 87.278256] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 87.377112] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 87.493175] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 87.521268] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 87.672706] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/22 14:51:17 executed programs: 8 [ 89.494282] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 89.502546] IP: [] l2tp_session_create+0x948/0x1030 [ 89.509266] PGD b7ab7067 PUD b57f2067 PMD 0 [ 89.514078] Oops: 0002 [#1] PREEMPT SMP KASAN [ 89.519055] Dumping ftrace buffer: [ 89.522573] (ftrace buffer empty) [ 89.526270] Modules linked in: [ 89.529594] CPU: 0 PID: 6800 Comm: syz-executor2 Not tainted 4.4.151-ge917467 #84 [ 89.537200] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.546547] task: ffff8800b03c3000 task.stack: ffff8800afe08000 [ 89.552595] RIP: 0010:[] [] l2tp_session_create+0x948/0x1030 [ 89.561742] RSP: 0018:ffff8800afe0fb48 EFLAGS: 00010246 [ 89.567175] RAX: 0000000000000000 RBX: ffff8801d23f2f00 RCX: 0000000000000000 [ 89.574436] RDX: 1ffff1003a47e610 RSI: ffffffff835a4543 RDI: ffff8801d23f3080 [ 89.581686] RBP: ffff8800afe0fbb8 R08: ffff8800b03c3900 R09: 0000000000000000 [ 89.588954] R10: 0000000000000000 R11: ffffffff8463a140 R12: ffff8800b67d8fa8 [ 89.596200] R13: ffff8800afe0fcd0 R14: ffff8800b67d8f00 R15: ffffffff835a4020 [ 89.603475] FS: 00007f84a2b01700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 89.611696] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.617553] CR2: 0000000000000080 CR3: 00000000b3f64000 CR4: 00000000001606f0 [ 89.624809] Stack: [ 89.626949] ffffffff81140a6a ffff8801d23f2f20 ffff8800b67d9058 ffff8800b67d8f10 [ 89.634985] ffffffff838cba90 ffff8800b67d8fb0 ffff8800b67d9050 ffff8801d23f2fe0 [ 89.642994] ffffffff00000000 ffff8801d238f700 0000000000000000 ffff8801d238f730 [ 89.651006] Call Trace: [ 89.653573] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 89.659872] [] ? _raw_read_unlock_bh+0x30/0x40 [ 89.666088] [] pppol2tp_connect+0x10f0/0x1910 [ 89.672213] [] ? pppol2tp_recv+0x320/0x320 [ 89.678079] [] ? security_socket_connect+0x8f/0xc0 [ 89.684647] [] SYSC_connect+0x1b8/0x300 [ 89.690286] [] ? SYSC_bind+0x280/0x280 [ 89.695821] [] ? get_unused_fd_flags+0xd0/0xd0 [ 89.702035] [] ? do_futex+0x17f0/0x17f0 [ 89.707639] [] ? SyS_socket+0x121/0x1b0 [ 89.713245] [] ? move_addr_to_kernel+0x50/0x50 [ 89.719455] [] SyS_connect+0x24/0x30 [ 89.724852] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 89.731409] 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 36 06 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 b0 e8 f1 13 [ 89.758455] RIP [] l2tp_session_create+0x948/0x1030 [ 89.765228] RSP [ 89.769085] CR2: 0000000000000080 [ 89.774383] ---[ end trace 78ad132645e9757c ]--- [ 89.779798] Kernel panic - not syncing: Fatal exception [ 89.785461] Dumping ftrace buffer: [ 89.788985] (ftrace buffer empty) [ 89.792668] Kernel Offset: disabled [ 89.796271] Rebooting in 86400 seconds..