[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.957080] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.507759] random: sshd: uninitialized urandom read (32 bytes read) [ 20.848598] random: sshd: uninitialized urandom read (32 bytes read) [ 21.365689] random: sshd: uninitialized urandom read (32 bytes read) [ 64.824196] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts. [ 70.394826] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/29 10:11:19 parsed 1 programs [ 71.531629] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/29 10:11:20 executed programs: 0 [ 72.693486] IPVS: Creating netns size=2536 id=1 [ 72.720745] IPVS: Creating netns size=2536 id=2 [ 72.747315] IPVS: Creating netns size=2536 id=3 [ 72.783899] IPVS: Creating netns size=2536 id=4 [ 72.824216] IPVS: Creating netns size=2536 id=5 [ 72.875122] IPVS: Creating netns size=2536 id=6 [ 72.931442] IPVS: Creating netns size=2536 id=7 [ 72.975190] IPVS: Creating netns size=2536 id=8 [ 73.216544] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.264381] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.351506] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.406699] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.427004] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.472461] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.493478] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.503051] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 73.517465] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.531865] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.556274] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 73.574172] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.662382] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 73.680294] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.703831] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 73.720833] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.769723] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 73.830416] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 73.841975] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.853244] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 73.862515] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 73.872996] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 73.890045] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 73.897173] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 73.906369] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.919567] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 73.956574] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 73.972057] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.995808] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 74.003553] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 74.017889] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.025488] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.041406] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 74.049765] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 74.057596] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.065135] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.080115] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.095281] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.116913] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.124410] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.138628] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.148465] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 74.163152] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.182913] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.191691] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.200830] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.215930] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.224925] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.237268] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.248330] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.255726] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 74.263733] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.273147] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.283601] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.300183] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.314297] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.324809] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.333875] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.352684] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.370818] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.381554] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.395674] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.403442] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.413886] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.424208] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 74.433332] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.443360] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.451534] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.464086] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.476209] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 74.488091] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.495608] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.506452] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.526495] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.537851] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.555482] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.567009] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.577973] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.585458] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.620067] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.675355] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.688931] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.696654] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.713142] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.735455] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.747308] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.764031] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 74.819263] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 74.856388] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 74.869042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.876542] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.921917] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 74.940400] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.950021] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 75.771265] ip (5142) used greatest stack depth: 24072 bytes left [ 77.680391] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.690040] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.736273] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.788305] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.818986] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 77.827654] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 77.834527] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.867185] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 77.873348] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 77.887396] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.901762] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 77.911216] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 77.925717] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.970796] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.991441] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 78.004612] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.012334] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.071566] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 78.093546] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 78.153077] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 78.163216] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.171960] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.231314] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 78.240817] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.252328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.270141] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 78.303508] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 78.314393] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.322033] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.411180] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 78.434328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.442201] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/08/29 10:11:27 executed programs: 8 [ 79.424045] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 79.432331] IP: [] l2tp_session_create+0xc60/0x16f0 [ 79.439048] PGD 1d507e067 [ 79.441712] PUD 1da178067 PMD 0 [ 79.445218] [ 79.446844] Oops: 0002 [#1] PREEMPT SMP KASAN [ 79.451329] Dumping ftrace buffer: [ 79.454857] (ftrace buffer empty) [ 79.458563] Modules linked in: [ 79.461885] CPU: 0 PID: 6903 Comm: syz-executor3 Not tainted 4.9.124-g09eb2ba #31 [ 79.469500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.478853] task: ffff8801bac68000 task.stack: ffff8801bb110000 [ 79.484897] RIP: 0010:[] [] l2tp_session_create+0xc60/0x16f0 [ 79.494052] RSP: 0018:ffff8801bb117ac0 EFLAGS: 00010246 [ 79.499497] RAX: 0000000000000000 RBX: ffff8801cc2dcc80 RCX: 1ffff1003758d11d [ 79.506764] RDX: 1ffff100395ca660 RSI: ffff8801bac688c8 RDI: ffff8801cae53300 [ 79.514028] RBP: ffff8801bb117b60 R08: ffff8801bac688e8 R09: 0000000000000000 [ 79.521292] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cae531d8 [ 79.528548] R13: 0000000000000000 R14: ffff8801cae53180 R15: 0000000000000000 [ 79.535796] FS: 00007fafff0f5700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 79.544000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.549879] CR2: 0000000000000080 CR3: 00000001c0891000 CR4: 00000000001606f0 [ 79.557128] Stack: [ 79.559271] ffffffff836c8e27 ffffffff836c9ec1 ffff8801cd872a48 0000000000000000 [ 79.567307] ffff8801cae53180 ffff8801cc2dcdd8 ffff8801cae531d8 ffff8801cc2dcdd0 [ 79.575334] ffff8801cc2dcd30 ffff8801cae531a0 ffff8801cd872200 0000000000000000 [ 79.583342] Call Trace: [ 79.585919] [] ? l2tp_session_create+0xed7/0x16f0 [ 79.592386] [] ? l2tp_session_get+0x1d1/0x790 [ 79.598543] [] pppol2tp_connect+0x10d7/0x18f0 [ 79.604668] [] ? pppol2tp_seq_show+0xc30/0xc30 [ 79.610884] [] ? security_socket_connect+0x8f/0xc0 [ 79.617464] [] SYSC_connect+0x1b8/0x300 [ 79.623074] [] ? SYSC_bind+0x280/0x280 [ 79.628588] [] ? get_unused_fd_flags+0xd0/0xd0 [ 79.634797] [] ? do_futex+0x17c0/0x17c0 [ 79.640400] [] ? SyS_socket+0x121/0x1b0 [ 79.646009] [] ? move_addr_to_kernel+0x50/0x50 [ 79.652232] [] SyS_connect+0x24/0x30 [ 79.657582] [] ? SyS_accept+0x30/0x30 [ 79.663021] [] do_syscall_64+0x1a6/0x490 [ 79.668711] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 79.675610] Code: 00 00 49 8d be 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 7b 09 00 00 49 8b 86 80 01 00 00 ff 80 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 55 d0 [ 79.702654] RIP [] l2tp_session_create+0xc60/0x16f0 [ 79.709427] RSP [ 79.713037] CR2: 0000000000000080 [ 79.718629] ---[ end trace eae5dc1093b169f3 ]--- [ 79.723397] Kernel panic - not syncing: Fatal exception [ 79.729051] Dumping ftrace buffer: [ 79.732578] (ftrace buffer empty) [ 79.736263] Kernel Offset: disabled [ 79.739867] Rebooting in 86400 seconds..