[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.190168] random: sshd: uninitialized urandom read (32 bytes read, 30 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.237813] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 25.606054] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 26.288611] random: sshd: uninitialized urandom read (32 bytes read, 64 bits of entropy available) [ 104.621030] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. [ 110.251028] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available) 2018/08/28 08:26:59 parsed 1 programs [ 111.864703] random: cc1: uninitialized urandom read (8 bytes read, 99 bits of entropy available) 2018/08/28 08:27:01 executed programs: 0 [ 112.854823] IPVS: Creating netns size=2552 id=1 [ 112.898636] IPVS: Creating netns size=2552 id=2 [ 112.944268] IPVS: Creating netns size=2552 id=3 [ 113.003483] IPVS: Creating netns size=2552 id=4 [ 113.054490] IPVS: Creating netns size=2552 id=5 [ 113.113621] IPVS: Creating netns size=2552 id=6 [ 113.205524] IPVS: Creating netns size=2552 id=7 [ 113.336433] IPVS: Creating netns size=2552 id=8 [ 113.477323] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 113.525186] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 113.642637] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 113.696967] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 113.814246] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 113.839497] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 113.851097] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 113.887889] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 113.935435] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 113.944463] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.096148] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 114.125867] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 114.150811] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.161999] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 114.173199] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.222263] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 114.254922] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 114.284118] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 114.293895] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 114.335900] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 114.379311] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 114.422682] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 114.430371] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.437971] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 114.449700] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 114.504721] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 114.518247] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 114.531711] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 114.588221] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 114.602594] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 114.635293] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 114.669797] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 114.681382] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 114.734767] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.744380] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 114.761759] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 114.795861] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 114.845551] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 114.901560] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 114.946956] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 114.997104] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.010755] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 115.029276] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 115.055828] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 115.073425] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 115.181515] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 115.191509] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 115.245395] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 115.301572] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 115.316644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 115.371319] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 115.383115] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 115.444962] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 115.481484] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 115.557081] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 115.573718] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 115.587353] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 115.692124] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 115.759844] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 115.833804] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 116.062791] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 116.108119] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 116.200195] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 116.243186] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 119.754323] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 119.844775] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 120.029782] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 120.051247] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 120.116902] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 120.304303] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 120.324939] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 120.418949] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready INIT: Id "2" respawning too fast: disabled for 5 minutes [ 120.569162] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes [ 120.635836] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 120.747715] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 120.878239] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 120.901271] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 121.130544] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 121.334187] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 121.600149] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/28 08:27:10 executed programs: 8 [ 123.722238] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 123.730524] IP: [] l2tp_session_create+0x948/0x1030 [ 123.737239] PGD b594a067 PUD b3f15067 PMD 0 [ 123.742564] Oops: 0002 [#1] PREEMPT SMP KASAN [ 123.747592] Dumping ftrace buffer: [ 123.751118] (ftrace buffer empty) [ 123.754837] Modules linked in: [ 123.758137] CPU: 1 PID: 6830 Comm: syz-executor7 Not tainted 4.4.153-g5e24b4e #26 [ 123.765767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.775106] task: ffff8801ce179800 task.stack: ffff8800b1c20000 [ 123.781147] RIP: 0010:[] [] l2tp_session_create+0x948/0x1030 [ 123.790278] RSP: 0018:ffff8800b1c27ad0 EFLAGS: 00010246 [ 123.795704] RAX: 0000000000000000 RBX: ffff8800b7649400 RCX: 0000000000000000 [ 123.802960] RDX: 1ffff10016ec92b0 RSI: ffffffff835a4c93 RDI: ffff8800b7649580 [ 123.810236] RBP: ffff8800b1c27b40 R08: 000000000000000a R09: 000000000000ffff [ 123.817516] R10: ffffed003a300b88 R11: ffffffff8463a200 R12: ffff8801d1805c28 [ 123.824762] R13: ffff8800b1c27c58 R14: ffff8801d1805b80 R15: ffffffff835a4770 [ 123.832030] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7770b40 [ 123.840229] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 123.846092] CR2: 0000000000000080 CR3: 00000000b11b8000 CR4: 00000000001606f0 [ 123.853338] Stack: [ 123.855461] ffffffff81140aba ffff8800b7649420 ffff8801d1805cd8 ffff8801d1805b90 [ 123.863510] ffffffff838cc1e0 ffff8801d1805c30 ffff8801d1805cd0 ffff8800b76494e0 [ 123.871534] ffffffff00000000 ffff8801ce0f2a80 0000000000000000 ffff8801ce0f2ab0 [ 123.879569] Call Trace: [ 123.882145] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 123.888454] [] ? _raw_read_unlock_bh+0x30/0x40 [ 123.894696] [] pppol2tp_connect+0x10f0/0x1910 [ 123.900834] [] ? pppol2tp_recv+0x320/0x320 [ 123.906700] [] ? security_socket_connect+0x8f/0xc0 [ 123.913255] [] SYSC_connect+0x1b8/0x300 [ 123.918854] [] ? SYSC_bind+0x280/0x280 [ 123.924368] [] ? get_unused_fd_flags+0xd0/0xd0 [ 123.930598] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 123.937585] [] ? SyS_socket+0x121/0x1b0 [ 123.943187] [] ? move_addr_to_kernel+0x50/0x50 [ 123.949405] [] SyS_connect+0x24/0x30 [ 123.954747] [] ? SyS_accept+0x30/0x30 [ 123.960202] [] do_fast_syscall_32+0x324/0x8b0 [ 123.966342] [] sysenter_flags_fixed+0xd/0x1a [ 123.972383] 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 [ 123.999414] RIP [] l2tp_session_create+0x948/0x1030 [ 124.006201] RSP [ 124.009811] CR2: 0000000000000080 [ 124.014633] ---[ end trace f4c96c440634a669 ]--- [ 124.019406] Kernel panic - not syncing: Fatal exception [ 124.025065] Dumping ftrace buffer: [ 124.028585] (ftrace buffer empty) [ 124.032270] Kernel Offset: disabled [ 124.035873] Rebooting in 86400 seconds..